/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:45:12,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:45:12,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:45:12,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:45:12,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:45:12,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:45:12,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:45:12,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:45:12,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:45:12,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:45:12,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:45:12,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:45:12,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:45:12,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:45:12,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:45:12,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:45:12,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:45:12,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:45:12,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:45:12,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:45:12,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:45:12,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:45:12,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:45:12,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:45:12,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:45:12,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:45:12,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:45:12,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:45:12,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:45:12,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:45:12,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:45:12,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:45:12,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:45:12,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:45:12,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:45:12,918 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:45:12,919 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:45:12,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:45:12,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:45:12,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:45:12,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:45:12,923 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:45:12,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:45:12,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:45:12,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:45:12,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:45:12,954 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:45:12,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:45:12,955 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:45:12,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:45:12,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:45:12,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:45:12,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:45:12,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:45:12,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:45:12,956 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:45:12,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:45:12,956 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:45:12,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:45:12,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:45:12,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:45:12,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:45:12,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:45:12,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:45:12,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:45:12,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:45:12,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:45:12,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:45:12,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:45:12,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:45:12,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:45:12,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:45:13,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:45:13,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:45:13,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:45:13,377 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:45:13,377 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:45:13,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-27 23:45:13,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37ecf7ce5/8b6c51b75ffc44358dfff9f1cfe72614/FLAGabcea7869 [2020-10-27 23:45:14,346 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:45:14,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-27 23:45:14,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37ecf7ce5/8b6c51b75ffc44358dfff9f1cfe72614/FLAGabcea7869 [2020-10-27 23:45:14,532 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37ecf7ce5/8b6c51b75ffc44358dfff9f1cfe72614 [2020-10-27 23:45:14,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:45:14,548 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:45:14,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:45:14,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:45:14,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:45:14,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:45:14" (1/1) ... [2020-10-27 23:45:14,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc7cbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:14, skipping insertion in model container [2020-10-27 23:45:14,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:45:14" (1/1) ... [2020-10-27 23:45:14,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:45:14,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:45:15,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:45:15,313 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:45:15,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:45:15,636 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:45:15,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:15 WrapperNode [2020-10-27 23:45:15,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:45:15,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:45:15,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:45:15,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:45:15,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:15" (1/1) ... [2020-10-27 23:45:15,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:15" (1/1) ... [2020-10-27 23:45:15,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:15" (1/1) ... [2020-10-27 23:45:15,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:15" (1/1) ... [2020-10-27 23:45:15,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:15" (1/1) ... [2020-10-27 23:45:15,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:15" (1/1) ... [2020-10-27 23:45:15,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:15" (1/1) ... [2020-10-27 23:45:15,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:45:15,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:45:15,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:45:15,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:45:15,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:45:15,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:45:15,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:45:15,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:45:15,891 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:45:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:45:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:45:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:45:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:45:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:45:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:45:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:45:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:45:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:45:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:45:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:45:15,896 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:45:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:45:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:45:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:45:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:45:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:45:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:45:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:45:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:45:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:45:15,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:45:15,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:45:15,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:45:17,878 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:45:17,878 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:45:17,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:45:17 BoogieIcfgContainer [2020-10-27 23:45:17,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:45:17,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:45:17,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:45:17,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:45:17,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:45:14" (1/3) ... [2020-10-27 23:45:17,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c00ba2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:45:17, skipping insertion in model container [2020-10-27 23:45:17,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:15" (2/3) ... [2020-10-27 23:45:17,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c00ba2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:45:17, skipping insertion in model container [2020-10-27 23:45:17,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:45:17" (3/3) ... [2020-10-27 23:45:17,891 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-27 23:45:17,904 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:45:17,910 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:45:17,925 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:45:17,957 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:45:17,957 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:45:17,958 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:45:17,958 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:45:17,958 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:45:17,958 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:45:17,958 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:45:17,958 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:45:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states. [2020-10-27 23:45:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 23:45:18,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:18,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:18,004 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:18,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1822577129, now seen corresponding path program 1 times [2020-10-27 23:45:18,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:18,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728987221] [2020-10-27 23:45:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:18,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:18,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:18,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:19,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:19,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:20,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:20,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:23,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:23,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 23:45:23,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:45:23,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 23:45:23,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:45:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:45:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:45:23,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:45:23,804 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2020-10-27 23:45:24,361 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:45:24,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:24,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:24,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:24,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:24,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:24,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 23:45:24,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:24,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:24,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:24,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:24,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:24,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728987221] [2020-10-27 23:45:24,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:24,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:45:24,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271449737] [2020-10-27 23:45:24,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:45:24,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:24,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:45:24,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:45:24,469 INFO L87 Difference]: Start difference. First operand 367 states. Second operand 9 states. [2020-10-27 23:45:25,083 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:45:28,513 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-27 23:45:29,772 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:45:29,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:29,906 INFO L93 Difference]: Finished difference Result 839 states and 1401 transitions. [2020-10-27 23:45:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 23:45:29,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-10-27 23:45:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:29,932 INFO L225 Difference]: With dead ends: 839 [2020-10-27 23:45:29,932 INFO L226 Difference]: Without dead ends: 665 [2020-10-27 23:45:29,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-27 23:45:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2020-10-27 23:45:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 381. [2020-10-27 23:45:30,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-27 23:45:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 487 transitions. [2020-10-27 23:45:30,025 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 487 transitions. Word has length 64 [2020-10-27 23:45:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:30,026 INFO L481 AbstractCegarLoop]: Abstraction has 381 states and 487 transitions. [2020-10-27 23:45:30,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:45:30,027 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 487 transitions. [2020-10-27 23:45:30,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 23:45:30,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:30,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:30,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:45:30,032 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:30,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1887238205, now seen corresponding path program 1 times [2020-10-27 23:45:30,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:30,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317721207] [2020-10-27 23:45:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:30,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:30,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:30,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:30,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:30,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:31,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:31,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:35,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:35,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 23:45:35,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:45:35,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:45:35,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:35,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:45:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:45:35,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:35,681 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:45:35,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:35,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:35,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:35,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:35,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:35,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:45:35,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:35,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:35,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:35,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:35,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:35,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317721207] [2020-10-27 23:45:35,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:35,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:35,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766189635] [2020-10-27 23:45:35,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:35,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:35,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:35,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:35,748 INFO L87 Difference]: Start difference. First operand 381 states and 487 transitions. Second operand 7 states. [2020-10-27 23:45:36,347 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:45:38,853 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-27 23:45:39,411 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:45:40,079 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:45:40,570 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:45:41,663 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:45:42,158 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-27 23:45:42,880 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-10-27 23:45:42,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:42,943 INFO L93 Difference]: Finished difference Result 1469 states and 2033 transitions. [2020-10-27 23:45:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:45:42,944 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-10-27 23:45:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:42,951 INFO L225 Difference]: With dead ends: 1469 [2020-10-27 23:45:42,951 INFO L226 Difference]: Without dead ends: 1224 [2020-10-27 23:45:42,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:45:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2020-10-27 23:45:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 642. [2020-10-27 23:45:43,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-10-27 23:45:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 883 transitions. [2020-10-27 23:45:43,014 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 883 transitions. Word has length 64 [2020-10-27 23:45:43,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:43,015 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 883 transitions. [2020-10-27 23:45:43,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 883 transitions. [2020-10-27 23:45:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:45:43,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:43,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:43,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:45:43,019 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:43,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:43,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1203174146, now seen corresponding path program 1 times [2020-10-27 23:45:43,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:43,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205461193] [2020-10-27 23:45:43,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:43,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:44,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:48,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:48,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:45:48,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:45:48,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:45:48,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:48,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:48,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:45:48,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:45:48,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:48,658 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:45:48,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:48,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:48,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:48,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:48,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:48,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:45:48,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:48,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:48,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:48,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:48,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:48,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205461193] [2020-10-27 23:45:48,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:48,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:48,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756020602] [2020-10-27 23:45:48,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:48,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:48,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:48,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:48,710 INFO L87 Difference]: Start difference. First operand 642 states and 883 transitions. Second operand 7 states. [2020-10-27 23:45:49,294 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:45:51,583 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-27 23:45:52,178 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:45:52,835 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:45:53,345 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:45:54,489 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-27 23:45:54,982 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:45:55,590 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-10-27 23:45:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:55,620 INFO L93 Difference]: Finished difference Result 3364 states and 4925 transitions. [2020-10-27 23:45:55,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:45:55,621 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-27 23:45:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:55,639 INFO L225 Difference]: With dead ends: 3364 [2020-10-27 23:45:55,639 INFO L226 Difference]: Without dead ends: 2842 [2020-10-27 23:45:55,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:45:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2020-10-27 23:45:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 1419. [2020-10-27 23:45:55,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1419 states. [2020-10-27 23:45:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 2058 transitions. [2020-10-27 23:45:55,768 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 2058 transitions. Word has length 65 [2020-10-27 23:45:55,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:55,771 INFO L481 AbstractCegarLoop]: Abstraction has 1419 states and 2058 transitions. [2020-10-27 23:45:55,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 2058 transitions. [2020-10-27 23:45:55,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:45:55,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:55,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:55,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:45:55,776 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:55,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:55,777 INFO L82 PathProgramCache]: Analyzing trace with hash 199708409, now seen corresponding path program 1 times [2020-10-27 23:45:55,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:55,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121858065] [2020-10-27 23:45:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:55,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:55,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:55,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:56,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:56,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:57,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:58,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:58,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:58,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:59,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:59,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:00,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:00,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:46:00,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:46:00,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:46:00,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:00,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:46:00,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:46:00,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:46:00,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:01,694 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:46:01,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:01,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:01,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:01,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:01,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:01,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 23:46:01,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:01,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:01,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121858065] [2020-10-27 23:46:01,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:01,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:46:01,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51120785] [2020-10-27 23:46:01,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:46:01,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:01,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:46:01,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:46:01,760 INFO L87 Difference]: Start difference. First operand 1419 states and 2058 transitions. Second operand 10 states. [2020-10-27 23:46:02,345 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-27 23:46:04,584 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:46:05,746 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:46:05,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:05,932 INFO L93 Difference]: Finished difference Result 3137 states and 4630 transitions. [2020-10-27 23:46:05,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 23:46:05,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-27 23:46:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:05,947 INFO L225 Difference]: With dead ends: 3137 [2020-10-27 23:46:05,947 INFO L226 Difference]: Without dead ends: 2457 [2020-10-27 23:46:05,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-27 23:46:05,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2020-10-27 23:46:06,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 1461. [2020-10-27 23:46:06,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1461 states. [2020-10-27 23:46:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2101 transitions. [2020-10-27 23:46:06,091 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2101 transitions. Word has length 66 [2020-10-27 23:46:06,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:06,093 INFO L481 AbstractCegarLoop]: Abstraction has 1461 states and 2101 transitions. [2020-10-27 23:46:06,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:46:06,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2101 transitions. [2020-10-27 23:46:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:46:06,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:06,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:06,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:46:06,097 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:06,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:06,098 INFO L82 PathProgramCache]: Analyzing trace with hash -460869141, now seen corresponding path program 1 times [2020-10-27 23:46:06,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:06,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113473908] [2020-10-27 23:46:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:06,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:07,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:07,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:07,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:07,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:08,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:09,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:11,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:46:11,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:46:11,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:46:11,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:11,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:46:11,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:46:11,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:46:11,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:11,938 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:46:11,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:11,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:11,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:11,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:11,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:46:11,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:11,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:11,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:11,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:11,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:11,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113473908] [2020-10-27 23:46:11,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:11,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:46:11,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543228525] [2020-10-27 23:46:11,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:46:11,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:11,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:46:11,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:46:11,998 INFO L87 Difference]: Start difference. First operand 1461 states and 2101 transitions. Second operand 10 states. [2020-10-27 23:46:12,520 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:46:14,729 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-27 23:46:15,403 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-27 23:46:17,097 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:46:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:17,430 INFO L93 Difference]: Finished difference Result 5994 states and 8834 transitions. [2020-10-27 23:46:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 23:46:17,431 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-27 23:46:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:17,460 INFO L225 Difference]: With dead ends: 5994 [2020-10-27 23:46:17,460 INFO L226 Difference]: Without dead ends: 5373 [2020-10-27 23:46:17,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2020-10-27 23:46:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5373 states. [2020-10-27 23:46:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5373 to 1471. [2020-10-27 23:46:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1471 states. [2020-10-27 23:46:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2117 transitions. [2020-10-27 23:46:17,637 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2117 transitions. Word has length 66 [2020-10-27 23:46:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:17,637 INFO L481 AbstractCegarLoop]: Abstraction has 1471 states and 2117 transitions. [2020-10-27 23:46:17,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:46:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2117 transitions. [2020-10-27 23:46:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:46:17,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:17,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:17,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:46:17,641 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:17,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:17,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1338605175, now seen corresponding path program 1 times [2020-10-27 23:46:17,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:17,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570157210] [2020-10-27 23:46:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:17,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:17,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:17,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:17,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:18,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:21,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:21,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:22,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:22,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:22,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:22,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:46:22,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:46:22,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:46:22,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:22,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:46:22,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:46:22,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:46:22,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:23,202 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:46:23,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:23,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:23,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:23,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:23,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:23,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 23:46:23,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:23,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:23,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570157210] [2020-10-27 23:46:23,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:23,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:46:23,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254784453] [2020-10-27 23:46:23,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:46:23,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:23,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:46:23,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:46:23,278 INFO L87 Difference]: Start difference. First operand 1471 states and 2117 transitions. Second operand 6 states. [2020-10-27 23:46:23,897 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:46:26,092 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:46:26,789 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:46:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:28,272 INFO L93 Difference]: Finished difference Result 5799 states and 8568 transitions. [2020-10-27 23:46:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:46:28,275 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-27 23:46:28,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:28,299 INFO L225 Difference]: With dead ends: 5799 [2020-10-27 23:46:28,300 INFO L226 Difference]: Without dead ends: 5316 [2020-10-27 23:46:28,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:46:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2020-10-27 23:46:28,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 3174. [2020-10-27 23:46:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-10-27 23:46:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 4633 transitions. [2020-10-27 23:46:28,624 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 4633 transitions. Word has length 66 [2020-10-27 23:46:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:28,624 INFO L481 AbstractCegarLoop]: Abstraction has 3174 states and 4633 transitions. [2020-10-27 23:46:28,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:46:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 4633 transitions. [2020-10-27 23:46:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:46:28,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:28,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:28,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:46:28,629 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:28,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:28,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1664294486, now seen corresponding path program 1 times [2020-10-27 23:46:28,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:28,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55722935] [2020-10-27 23:46:28,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:28,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:28,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:28,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:28,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:29,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:29,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:29,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:30,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:30,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:31,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:31,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:31,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:31,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:31,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:32,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:33,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:33,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:46:33,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:46:33,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:46:33,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:46:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:46:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 23:46:33,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:34,180 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:46:34,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:34,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:34,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:34,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:34,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:34,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:46:34,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:34,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:34,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55722935] [2020-10-27 23:46:34,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:34,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:46:34,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5678461] [2020-10-27 23:46:34,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:46:34,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:34,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:46:34,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:46:34,224 INFO L87 Difference]: Start difference. First operand 3174 states and 4633 transitions. Second operand 7 states. [2020-10-27 23:46:34,779 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:46:36,627 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-27 23:46:37,175 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:46:37,780 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:46:38,281 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:46:39,713 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-27 23:46:40,250 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:46:41,089 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-10-27 23:46:41,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:41,166 INFO L93 Difference]: Finished difference Result 10624 states and 15792 transitions. [2020-10-27 23:46:41,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:46:41,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-27 23:46:41,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:41,207 INFO L225 Difference]: With dead ends: 10624 [2020-10-27 23:46:41,207 INFO L226 Difference]: Without dead ends: 9093 [2020-10-27 23:46:41,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:46:41,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9093 states. [2020-10-27 23:46:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9093 to 4069. [2020-10-27 23:46:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4069 states. [2020-10-27 23:46:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 5987 transitions. [2020-10-27 23:46:41,804 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 5987 transitions. Word has length 66 [2020-10-27 23:46:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:41,804 INFO L481 AbstractCegarLoop]: Abstraction has 4069 states and 5987 transitions. [2020-10-27 23:46:41,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:46:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 5987 transitions. [2020-10-27 23:46:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:46:41,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:41,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:41,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:46:41,808 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:41,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1794733537, now seen corresponding path program 1 times [2020-10-27 23:46:41,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:41,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920733605] [2020-10-27 23:46:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:41,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:41,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:41,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:42,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:42,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:42,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:43,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:44,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:46,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:46,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:46,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:46,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:46,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:46,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:46,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:46:46,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:46:46,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 23:46:46,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:46,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:46:46,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:46:46,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:46:46,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:47,364 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:46:47,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:47,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:47,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:47,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:47,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:47,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:46:47,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:47,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:47,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920733605] [2020-10-27 23:46:47,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:47,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:46:47,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664704674] [2020-10-27 23:46:47,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:46:47,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:47,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:46:47,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:46:47,408 INFO L87 Difference]: Start difference. First operand 4069 states and 5987 transitions. Second operand 6 states. [2020-10-27 23:46:47,903 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:46:49,770 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:46:50,415 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:46:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:51,281 INFO L93 Difference]: Finished difference Result 7869 states and 11598 transitions. [2020-10-27 23:46:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:46:51,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-27 23:46:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:51,303 INFO L225 Difference]: With dead ends: 7869 [2020-10-27 23:46:51,303 INFO L226 Difference]: Without dead ends: 7003 [2020-10-27 23:46:51,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:46:51,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7003 states. [2020-10-27 23:46:51,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7003 to 5313. [2020-10-27 23:46:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5313 states. [2020-10-27 23:46:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 7812 transitions. [2020-10-27 23:46:51,878 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 7812 transitions. Word has length 66 [2020-10-27 23:46:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:51,878 INFO L481 AbstractCegarLoop]: Abstraction has 5313 states and 7812 transitions. [2020-10-27 23:46:51,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:46:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 7812 transitions. [2020-10-27 23:46:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:46:51,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:51,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:51,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:46:51,882 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:51,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:51,883 INFO L82 PathProgramCache]: Analyzing trace with hash 961920175, now seen corresponding path program 1 times [2020-10-27 23:46:51,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:51,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117432848] [2020-10-27 23:46:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:51,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:51,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:53,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:53,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:53,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:53,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:53,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:54,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:55,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:55,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:55,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:55,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:55,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:56,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:56,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:56,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:56,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:56,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:56,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:46:56,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 23:46:56,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:46:56,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:46:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:46:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:46:56,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:57,542 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:46:57,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:57,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:57,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:57,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:57,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:57,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:46:57,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:57,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:57,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:57,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:57,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:57,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117432848] [2020-10-27 23:46:57,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:57,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:46:57,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527216363] [2020-10-27 23:46:57,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:46:57,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:57,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:46:57,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:46:57,578 INFO L87 Difference]: Start difference. First operand 5313 states and 7812 transitions. Second operand 9 states. [2020-10-27 23:46:58,169 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2020-10-27 23:47:00,267 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-10-27 23:47:03,734 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:47:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:04,212 INFO L93 Difference]: Finished difference Result 21109 states and 31326 transitions. [2020-10-27 23:47:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:47:04,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-10-27 23:47:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:04,253 INFO L225 Difference]: With dead ends: 21109 [2020-10-27 23:47:04,254 INFO L226 Difference]: Without dead ends: 17085 [2020-10-27 23:47:04,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-27 23:47:04,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17085 states. [2020-10-27 23:47:05,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17085 to 4173. [2020-10-27 23:47:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4173 states. [2020-10-27 23:47:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 6083 transitions. [2020-10-27 23:47:05,060 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 6083 transitions. Word has length 66 [2020-10-27 23:47:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:05,060 INFO L481 AbstractCegarLoop]: Abstraction has 4173 states and 6083 transitions. [2020-10-27 23:47:05,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:47:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 6083 transitions. [2020-10-27 23:47:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:47:05,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:05,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:05,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:47:05,065 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:05,065 INFO L82 PathProgramCache]: Analyzing trace with hash 355325837, now seen corresponding path program 1 times [2020-10-27 23:47:05,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:05,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441327187] [2020-10-27 23:47:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:05,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:05,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:05,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:05,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:05,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:05,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:06,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:06,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:06,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:07,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:07,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:07,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:08,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:08,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:08,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:08,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:08,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:08,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:08,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:09,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:09,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:09,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:10,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:10,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:47:10,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 23:47:10,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:47:10,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:47:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:47:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:47:10,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:10,757 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:47:10,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:10,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:10,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:10,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:10,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:10,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:47:10,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:10,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:10,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:10,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:10,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:10,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441327187] [2020-10-27 23:47:10,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:10,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:47:10,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76830954] [2020-10-27 23:47:10,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:47:10,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:10,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:47:10,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:47:10,792 INFO L87 Difference]: Start difference. First operand 4173 states and 6083 transitions. Second operand 9 states. [2020-10-27 23:47:11,455 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:47:13,576 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-27 23:47:15,016 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:47:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:15,538 INFO L93 Difference]: Finished difference Result 11351 states and 16747 transitions. [2020-10-27 23:47:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 23:47:15,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-10-27 23:47:15,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:15,558 INFO L225 Difference]: With dead ends: 11351 [2020-10-27 23:47:15,559 INFO L226 Difference]: Without dead ends: 8502 [2020-10-27 23:47:15,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-27 23:47:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8502 states. [2020-10-27 23:47:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8502 to 4170. [2020-10-27 23:47:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4170 states. [2020-10-27 23:47:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4170 states to 4170 states and 6069 transitions. [2020-10-27 23:47:16,122 INFO L78 Accepts]: Start accepts. Automaton has 4170 states and 6069 transitions. Word has length 66 [2020-10-27 23:47:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:16,122 INFO L481 AbstractCegarLoop]: Abstraction has 4170 states and 6069 transitions. [2020-10-27 23:47:16,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:47:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states and 6069 transitions. [2020-10-27 23:47:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:47:16,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:16,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:16,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:47:16,125 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:16,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1303735664, now seen corresponding path program 1 times [2020-10-27 23:47:16,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:16,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130639613] [2020-10-27 23:47:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:16,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:16,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:16,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:16,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:16,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:18,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:21,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:21,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:47:21,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:47:21,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:47:21,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:21,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:47:21,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:47:21,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:47:21,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:21,723 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:47:21,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:21,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:21,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:21,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:21,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:21,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:47:21,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:21,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:21,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:21,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:21,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:21,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130639613] [2020-10-27 23:47:21,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:21,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:47:21,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847845267] [2020-10-27 23:47:21,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:47:21,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:21,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:47:21,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:47:21,773 INFO L87 Difference]: Start difference. First operand 4170 states and 6069 transitions. Second operand 7 states. [2020-10-27 23:47:22,343 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:47:24,399 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-27 23:47:24,944 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:47:25,538 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:47:26,048 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:47:27,699 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-27 23:47:28,229 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:47:29,205 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-10-27 23:47:29,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:29,377 INFO L93 Difference]: Finished difference Result 9248 states and 13549 transitions. [2020-10-27 23:47:29,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:47:29,378 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-27 23:47:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:29,396 INFO L225 Difference]: With dead ends: 9248 [2020-10-27 23:47:29,396 INFO L226 Difference]: Without dead ends: 8088 [2020-10-27 23:47:29,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:47:29,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8088 states. [2020-10-27 23:47:29,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8088 to 3727. [2020-10-27 23:47:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3727 states. [2020-10-27 23:47:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 5413 transitions. [2020-10-27 23:47:29,923 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 5413 transitions. Word has length 66 [2020-10-27 23:47:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:29,924 INFO L481 AbstractCegarLoop]: Abstraction has 3727 states and 5413 transitions. [2020-10-27 23:47:29,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:47:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 5413 transitions. [2020-10-27 23:47:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:47:29,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:29,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:29,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:47:29,926 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:29,926 INFO L82 PathProgramCache]: Analyzing trace with hash -996789686, now seen corresponding path program 1 times [2020-10-27 23:47:29,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:29,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083060731] [2020-10-27 23:47:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:29,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:34,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:34,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:34,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:47:34,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:47:34,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:47:34,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:34,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:47:34,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:47:34,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:47:34,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:35,450 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:47:35,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:35,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:35,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:35,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:35,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:35,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:47:35,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:35,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:35,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:35,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:35,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:35,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083060731] [2020-10-27 23:47:35,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:35,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:47:35,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279551015] [2020-10-27 23:47:35,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:47:35,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:35,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:47:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:47:35,483 INFO L87 Difference]: Start difference. First operand 3727 states and 5413 transitions. Second operand 6 states. [2020-10-27 23:47:35,980 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:47:38,230 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:47:38,929 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:47:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:41,831 INFO L93 Difference]: Finished difference Result 15950 states and 23594 transitions. [2020-10-27 23:47:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:47:41,831 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-27 23:47:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:41,859 INFO L225 Difference]: With dead ends: 15950 [2020-10-27 23:47:41,859 INFO L226 Difference]: Without dead ends: 13944 [2020-10-27 23:47:41,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:47:41,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13944 states. [2020-10-27 23:47:43,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13944 to 6512. [2020-10-27 23:47:43,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6512 states. [2020-10-27 23:47:43,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 9519 transitions. [2020-10-27 23:47:43,085 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 9519 transitions. Word has length 66 [2020-10-27 23:47:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:43,085 INFO L481 AbstractCegarLoop]: Abstraction has 6512 states and 9519 transitions. [2020-10-27 23:47:43,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:47:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 9519 transitions. [2020-10-27 23:47:43,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:47:43,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:43,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:43,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:47:43,088 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:43,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:43,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1753851309, now seen corresponding path program 1 times [2020-10-27 23:47:43,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:43,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261708941] [2020-10-27 23:47:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:43,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:43,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:43,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:43,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:43,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:44,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:44,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:44,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:44,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:44,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:45,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:45,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:45,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:45,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:45,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:45,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:46,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:46,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:48,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:48,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:47:48,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:47:48,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:47:48,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:48,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:47:48,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:47:48,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:47:48,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:48,621 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:47:48,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:48,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:48,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:48,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:48,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:47:48,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:48,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:48,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:48,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:48,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:48,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261708941] [2020-10-27 23:47:48,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:48,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:47:48,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372723596] [2020-10-27 23:47:48,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:47:48,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:48,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:47:48,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:47:48,651 INFO L87 Difference]: Start difference. First operand 6512 states and 9519 transitions. Second operand 7 states. [2020-10-27 23:47:49,180 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:47:51,085 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-27 23:47:51,670 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:47:52,303 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:47:52,855 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:47:54,512 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-27 23:47:55,062 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-27 23:47:56,029 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-10-27 23:47:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:56,114 INFO L93 Difference]: Finished difference Result 9519 states and 13920 transitions. [2020-10-27 23:47:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:47:56,115 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-27 23:47:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:56,126 INFO L225 Difference]: With dead ends: 9519 [2020-10-27 23:47:56,126 INFO L226 Difference]: Without dead ends: 7036 [2020-10-27 23:47:56,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:47:56,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7036 states. [2020-10-27 23:47:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7036 to 4060. [2020-10-27 23:47:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4060 states. [2020-10-27 23:47:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 5884 transitions. [2020-10-27 23:47:56,892 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 5884 transitions. Word has length 66 [2020-10-27 23:47:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:56,892 INFO L481 AbstractCegarLoop]: Abstraction has 4060 states and 5884 transitions. [2020-10-27 23:47:56,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:47:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 5884 transitions. [2020-10-27 23:47:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:47:56,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:56,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:56,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:47:56,895 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:56,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1878700648, now seen corresponding path program 1 times [2020-10-27 23:47:56,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:56,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472721343] [2020-10-27 23:47:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:56,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:56,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:57,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:57,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:57,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:57,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:57,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:57,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:58,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:58,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:58,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:58,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:59,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:59,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:59,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:01,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:01,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:01,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:48:01,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:48:01,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:48:01,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:01,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:48:01,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:48:01,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 23:48:01,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:02,567 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:48:02,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:02,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:02,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:02,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:02,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:02,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:48:02,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:02,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:02,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:02,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:48:02,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472721343] [2020-10-27 23:48:02,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:02,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:48:02,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46080336] [2020-10-27 23:48:02,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:48:02,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:02,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:48:02,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:48:02,602 INFO L87 Difference]: Start difference. First operand 4060 states and 5884 transitions. Second operand 11 states. [2020-10-27 23:48:03,250 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification that was a NOOP. DAG size: 270 [2020-10-27 23:48:05,976 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-27 23:48:06,583 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:48:07,221 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-10-27 23:48:10,451 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-27 23:48:12,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:12,821 INFO L93 Difference]: Finished difference Result 14824 states and 21536 transitions. [2020-10-27 23:48:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 23:48:12,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-27 23:48:12,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:12,842 INFO L225 Difference]: With dead ends: 14824 [2020-10-27 23:48:12,842 INFO L226 Difference]: Without dead ends: 14816 [2020-10-27 23:48:12,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 23:48:12,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14816 states. [2020-10-27 23:48:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14816 to 4060. [2020-10-27 23:48:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4060 states. [2020-10-27 23:48:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 5878 transitions. [2020-10-27 23:48:13,508 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 5878 transitions. Word has length 67 [2020-10-27 23:48:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:13,508 INFO L481 AbstractCegarLoop]: Abstraction has 4060 states and 5878 transitions. [2020-10-27 23:48:13,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:48:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 5878 transitions. [2020-10-27 23:48:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:48:13,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:13,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:48:13,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:48:13,511 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:13,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1418433303, now seen corresponding path program 1 times [2020-10-27 23:48:13,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:13,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469105193] [2020-10-27 23:48:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:13,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:13,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:13,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:13,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:13,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:14,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:14,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:15,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:15,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:15,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:15,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:16,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:16,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:18,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:18,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:48:18,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:48:18,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:48:18,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:48:18,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:48:18,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:48:18,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:19,050 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:48:19,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:19,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:19,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:19,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:19,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:19,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:48:19,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:19,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:48:19,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469105193] [2020-10-27 23:48:19,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:19,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:48:19,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034514965] [2020-10-27 23:48:19,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:48:19,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:19,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:48:19,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:48:19,079 INFO L87 Difference]: Start difference. First operand 4060 states and 5878 transitions. Second operand 6 states. [2020-10-27 23:48:19,605 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:48:21,711 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 23:48:22,420 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:48:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:24,853 INFO L93 Difference]: Finished difference Result 9494 states and 13891 transitions. [2020-10-27 23:48:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:48:24,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 23:48:24,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:24,871 INFO L225 Difference]: With dead ends: 9494 [2020-10-27 23:48:24,871 INFO L226 Difference]: Without dead ends: 9487 [2020-10-27 23:48:24,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:48:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9487 states. [2020-10-27 23:48:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9487 to 4060. [2020-10-27 23:48:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4060 states. [2020-10-27 23:48:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 5874 transitions. [2020-10-27 23:48:25,537 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 5874 transitions. Word has length 67 [2020-10-27 23:48:25,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:25,537 INFO L481 AbstractCegarLoop]: Abstraction has 4060 states and 5874 transitions. [2020-10-27 23:48:25,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:48:25,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 5874 transitions. [2020-10-27 23:48:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:48:25,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:25,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:48:25,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:48:25,540 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:25,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1654061994, now seen corresponding path program 1 times [2020-10-27 23:48:25,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:25,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641351034] [2020-10-27 23:48:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:25,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:25,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:25,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:25,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:25,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:26,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:27,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:27,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:30,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:30,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:30,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:30,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:48:30,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:48:30,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 23:48:30,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:30,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:48:30,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:48:30,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 23:48:30,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:31,273 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:48:31,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:31,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:31,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:31,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:31,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:31,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:48:31,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:31,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:31,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:31,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:31,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:48:31,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641351034] [2020-10-27 23:48:31,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:31,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:48:31,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94038221] [2020-10-27 23:48:31,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:48:31,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:31,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:48:31,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:48:31,319 INFO L87 Difference]: Start difference. First operand 4060 states and 5874 transitions. Second operand 9 states. [2020-10-27 23:48:31,945 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-27 23:48:34,023 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-27 23:48:34,738 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-27 23:48:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:36,668 INFO L93 Difference]: Finished difference Result 10717 states and 15802 transitions. [2020-10-27 23:48:36,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:48:36,669 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-27 23:48:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:36,678 INFO L225 Difference]: With dead ends: 10717 [2020-10-27 23:48:36,678 INFO L226 Difference]: Without dead ends: 9316 [2020-10-27 23:48:36,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:48:36,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2020-10-27 23:48:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 4008. [2020-10-27 23:48:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4008 states. [2020-10-27 23:48:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 5785 transitions. [2020-10-27 23:48:37,350 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 5785 transitions. Word has length 67 [2020-10-27 23:48:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:37,350 INFO L481 AbstractCegarLoop]: Abstraction has 4008 states and 5785 transitions. [2020-10-27 23:48:37,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:48:37,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 5785 transitions. [2020-10-27 23:48:37,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:48:37,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:37,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:48:37,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:48:37,353 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:37,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:37,353 INFO L82 PathProgramCache]: Analyzing trace with hash 115748410, now seen corresponding path program 1 times [2020-10-27 23:48:37,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:37,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901428300] [2020-10-27 23:48:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:37,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:37,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:37,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:37,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:37,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:38,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:39,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:39,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:39,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:40,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:42,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:42,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:48:42,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:48:42,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:48:42,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:42,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:48:42,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:48:42,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:48:42,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:42,933 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-27 23:48:42,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:42,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:42,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:42,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:42,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:42,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:48:42,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:42,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:42,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:42,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:42,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:48:42,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901428300] [2020-10-27 23:48:42,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:42,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:48:42,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101980131] [2020-10-27 23:48:42,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:48:42,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:42,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:48:42,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:48:42,976 INFO L87 Difference]: Start difference. First operand 4008 states and 5785 transitions. Second operand 6 states. [2020-10-27 23:48:43,541 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:48:46,185 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-27 23:48:46,739 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 249