/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=NARROWEST --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 -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:34:21,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:34:21,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:34:21,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:34:21,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:34:21,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:34:21,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:34:21,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:34:21,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:34:21,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:34:21,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:34:21,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:34:21,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:34:21,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:34:21,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:34:21,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:34:21,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:34:21,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:34:21,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:34:21,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:34:21,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:34:21,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:34:21,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:34:21,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:34:21,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:34:21,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:34:21,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:34:21,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:34:21,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:34:21,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:34:21,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:34:21,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:34:21,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:34:21,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:34:21,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:34:21,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:34:21,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:34:21,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:34:21,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:34:21,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:34:21,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:34:21,936 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 [2020-10-13 14:34:21,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:34:21,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:34:21,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:34:21,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:34:21,968 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:34:21,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:34:21,969 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:34:21,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:34:21,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:34:21,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:34:21,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:34:21,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:34:21,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:34:21,970 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:34:21,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:34:21,970 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:34:21,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:34:21,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:34:21,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:34:21,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:34:21,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:34:21,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:34:21,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:34:21,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:34:21,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:34:21,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:34:21,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:34:21,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:34:21,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:34:21,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:34:22,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:34:22,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:34:22,296 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:34:22,298 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:34:22,298 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:34:22,299 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 14:34:22,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d633ba715/638a5f7e586149cfb4044fdadd0df34a/FLAG536fbe8aa [2020-10-13 14:34:22,872 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:34:22,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 14:34:22,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d633ba715/638a5f7e586149cfb4044fdadd0df34a/FLAG536fbe8aa [2020-10-13 14:34:23,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d633ba715/638a5f7e586149cfb4044fdadd0df34a [2020-10-13 14:34:23,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:34:23,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:34:23,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:34:23,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:34:23,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:34:23,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:34:23" (1/1) ... [2020-10-13 14:34:23,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103260cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:34:23, skipping insertion in model container [2020-10-13 14:34:23,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:34:23" (1/1) ... [2020-10-13 14:34:23,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:34:23,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:34:23,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:34:23,651 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:34:23,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:34:23,791 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:34:23,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:34:23 WrapperNode [2020-10-13 14:34:23,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:34:23,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:34:23,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:34:23,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:34:23,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:34:23" (1/1) ... [2020-10-13 14:34:23,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:34:23" (1/1) ... [2020-10-13 14:34:23,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:34:23" (1/1) ... [2020-10-13 14:34:23,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:34:23" (1/1) ... [2020-10-13 14:34:23,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:34:23" (1/1) ... [2020-10-13 14:34:23,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:34:23" (1/1) ... [2020-10-13 14:34:23,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:34:23" (1/1) ... [2020-10-13 14:34:23,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:34:23,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:34:23,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:34:23,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:34:23,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:34:23" (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 [2020-10-13 14:34:23,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:34:23,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:34:23,968 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:34:23,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:34:23,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:34:23,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:34:23,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:34:23,969 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:34:23,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:34:23,969 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:34:23,969 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:34:23,969 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:34:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:34:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:34:23,975 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:34:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:34:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:34:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:34:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:34:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:34:24,727 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:34:24,728 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:34:24,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:34:24 BoogieIcfgContainer [2020-10-13 14:34:24,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:34:24,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:34:24,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:34:24,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:34:24,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:34:23" (1/3) ... [2020-10-13 14:34:24,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bcb3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:34:24, skipping insertion in model container [2020-10-13 14:34:24,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:34:23" (2/3) ... [2020-10-13 14:34:24,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bcb3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:34:24, skipping insertion in model container [2020-10-13 14:34:24,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:34:24" (3/3) ... [2020-10-13 14:34:24,742 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 14:34:24,753 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:34:24,761 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:34:24,776 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:34:24,803 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:34:24,803 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:34:24,803 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:34:24,803 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:34:24,804 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:34:24,804 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:34:24,804 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:34:24,804 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:34:24,827 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states. [2020-10-13 14:34:24,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 14:34:24,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:24,837 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] [2020-10-13 14:34:24,838 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:24,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:24,845 INFO L82 PathProgramCache]: Analyzing trace with hash 962755420, now seen corresponding path program 1 times [2020-10-13 14:34:24,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:24,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442277435] [2020-10-13 14:34:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:25,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:25,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:25,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:26,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:26,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 14:34:26,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:34:26,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1587 [2020-10-13 14:34:26,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:26,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:34:26,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:34:26,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:34:26,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:34:26,991 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 14:34:26,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:34:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:27,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:27,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:27,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:34:27,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:34:27,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:34:27,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:27,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:34:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:34:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:34:27,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:34:27,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442277435] [2020-10-13 14:34:27,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:34:27,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:34:27,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961201986] [2020-10-13 14:34:27,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:34:27,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:34:27,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:34:27,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:34:27,073 INFO L87 Difference]: Start difference. First operand 153 states. Second operand 4 states. [2020-10-13 14:34:27,267 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-13 14:34:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:34:27,990 INFO L93 Difference]: Finished difference Result 293 states and 472 transitions. [2020-10-13 14:34:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:34:27,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-13 14:34:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:34:28,008 INFO L225 Difference]: With dead ends: 293 [2020-10-13 14:34:28,008 INFO L226 Difference]: Without dead ends: 222 [2020-10-13 14:34:28,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:34:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-13 14:34:28,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2020-10-13 14:34:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-13 14:34:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 323 transitions. [2020-10-13 14:34:28,084 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 323 transitions. Word has length 53 [2020-10-13 14:34:28,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:34:28,084 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 323 transitions. [2020-10-13 14:34:28,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:34:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 323 transitions. [2020-10-13 14:34:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 14:34:28,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:28,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:34:28,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:34:28,088 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:28,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:28,088 INFO L82 PathProgramCache]: Analyzing trace with hash 997989080, now seen corresponding path program 1 times [2020-10-13 14:34:28,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:28,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119709970] [2020-10-13 14:34:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:28,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:28,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:28,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:28,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:29,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:31,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:31,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 14:34:31,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:34:31,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3616 [2020-10-13 14:34:31,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:31,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:34:31,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 14:34:31,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 14:34:31,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:34:31,937 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 14:34:31,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:34:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:31,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:31,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:31,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:34:31,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:34:31,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:34:31,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:31,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:34:31,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:34:31,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:34:31,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 14:34:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:34:31,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119709970] [2020-10-13 14:34:31,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:34:31,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:34:31,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966493681] [2020-10-13 14:34:31,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:34:31,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:34:31,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:34:31,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:34:31,988 INFO L87 Difference]: Start difference. First operand 220 states and 323 transitions. Second operand 4 states. [2020-10-13 14:34:32,124 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-13 14:34:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:34:32,761 INFO L93 Difference]: Finished difference Result 544 states and 821 transitions. [2020-10-13 14:34:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:34:32,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-13 14:34:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:34:32,766 INFO L225 Difference]: With dead ends: 544 [2020-10-13 14:34:32,768 INFO L226 Difference]: Without dead ends: 382 [2020-10-13 14:34:32,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:34:32,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-13 14:34:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 380. [2020-10-13 14:34:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-13 14:34:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 560 transitions. [2020-10-13 14:34:32,824 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 560 transitions. Word has length 56 [2020-10-13 14:34:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:34:32,824 INFO L479 AbstractCegarLoop]: Abstraction has 380 states and 560 transitions. [2020-10-13 14:34:32,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:34:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 560 transitions. [2020-10-13 14:34:32,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 14:34:32,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:32,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:34:32,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:34:32,830 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:32,830 INFO L82 PathProgramCache]: Analyzing trace with hash 411303576, now seen corresponding path program 1 times [2020-10-13 14:34:32,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:32,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495986058] [2020-10-13 14:34:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:32,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:32,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:32,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:33,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:33,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:35,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:35,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 14:34:35,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:34:35,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2956 [2020-10-13 14:34:35,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:35,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:34:35,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 14:34:35,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 14:34:35,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:35,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:34:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:35,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:35,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:35,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:34:35,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:34:35,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:34:35,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:35,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:34:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:34:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:34:35,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:34:35,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495986058] [2020-10-13 14:34:35,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:34:35,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:34:35,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630822645] [2020-10-13 14:34:35,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:34:35,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:34:35,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:34:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:34:35,981 INFO L87 Difference]: Start difference. First operand 380 states and 560 transitions. Second operand 4 states. [2020-10-13 14:34:36,107 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-13 14:34:36,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:34:36,620 INFO L93 Difference]: Finished difference Result 896 states and 1339 transitions. [2020-10-13 14:34:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:34:36,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-13 14:34:36,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:34:36,624 INFO L225 Difference]: With dead ends: 896 [2020-10-13 14:34:36,625 INFO L226 Difference]: Without dead ends: 638 [2020-10-13 14:34:36,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:34:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-10-13 14:34:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 636. [2020-10-13 14:34:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2020-10-13 14:34:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 931 transitions. [2020-10-13 14:34:36,657 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 931 transitions. Word has length 56 [2020-10-13 14:34:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:34:36,657 INFO L479 AbstractCegarLoop]: Abstraction has 636 states and 931 transitions. [2020-10-13 14:34:36,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:34:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 931 transitions. [2020-10-13 14:34:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 14:34:36,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:36,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:34:36,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:34:36,660 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:36,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1138605866, now seen corresponding path program 1 times [2020-10-13 14:34:36,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:36,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545457757] [2020-10-13 14:34:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:36,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:36,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:36,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:36,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:37,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:39,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:39,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 14:34:39,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:34:39,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2887 [2020-10-13 14:34:39,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:39,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:34:39,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 14:34:39,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 14:34:39,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:39,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:34:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:39,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:39,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:39,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:34:39,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:34:39,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:34:39,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:39,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:34:39,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:34:39,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:34:39,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:34:39,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545457757] [2020-10-13 14:34:39,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:34:39,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:34:39,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726858787] [2020-10-13 14:34:39,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:34:39,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:34:39,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:34:39,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:34:39,727 INFO L87 Difference]: Start difference. First operand 636 states and 931 transitions. Second operand 4 states. [2020-10-13 14:34:39,852 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-13 14:34:40,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:34:40,478 INFO L93 Difference]: Finished difference Result 1616 states and 2377 transitions. [2020-10-13 14:34:40,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:34:40,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-13 14:34:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:34:40,484 INFO L225 Difference]: With dead ends: 1616 [2020-10-13 14:34:40,485 INFO L226 Difference]: Without dead ends: 1110 [2020-10-13 14:34:40,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:34:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2020-10-13 14:34:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1108. [2020-10-13 14:34:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1108 states. [2020-10-13 14:34:40,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1593 transitions. [2020-10-13 14:34:40,534 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1593 transitions. Word has length 56 [2020-10-13 14:34:40,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:34:40,534 INFO L479 AbstractCegarLoop]: Abstraction has 1108 states and 1593 transitions. [2020-10-13 14:34:40,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:34:40,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1593 transitions. [2020-10-13 14:34:40,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:34:40,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:40,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:34:40,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:34:40,537 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:40,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:40,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1440067778, now seen corresponding path program 1 times [2020-10-13 14:34:40,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:40,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463285255] [2020-10-13 14:34:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:40,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:40,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:40,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:40,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:41,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:43,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:43,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:34:43,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:34:43,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2661 [2020-10-13 14:34:43,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:43,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:34:43,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:34:43,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:34:43,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:43,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:34:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:43,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:43,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:43,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:34:43,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:34:43,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:34:43,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:43,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:34:43,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:34:43,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:34:43,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:34:43,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463285255] [2020-10-13 14:34:43,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:34:43,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:34:43,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436703600] [2020-10-13 14:34:43,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:34:43,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:34:43,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:34:43,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:34:43,376 INFO L87 Difference]: Start difference. First operand 1108 states and 1593 transitions. Second operand 6 states. [2020-10-13 14:34:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:34:44,306 INFO L93 Difference]: Finished difference Result 4644 states and 6773 transitions. [2020-10-13 14:34:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 14:34:44,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-13 14:34:44,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:34:44,327 INFO L225 Difference]: With dead ends: 4644 [2020-10-13 14:34:44,327 INFO L226 Difference]: Without dead ends: 3862 [2020-10-13 14:34:44,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:34:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2020-10-13 14:34:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 1120. [2020-10-13 14:34:44,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2020-10-13 14:34:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1593 transitions. [2020-10-13 14:34:44,462 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1593 transitions. Word has length 57 [2020-10-13 14:34:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:34:44,463 INFO L479 AbstractCegarLoop]: Abstraction has 1120 states and 1593 transitions. [2020-10-13 14:34:44,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:34:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1593 transitions. [2020-10-13 14:34:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:34:44,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:44,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:34:44,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:34:44,465 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:44,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:44,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1157062699, now seen corresponding path program 1 times [2020-10-13 14:34:44,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:44,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001274462] [2020-10-13 14:34:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:44,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:44,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:44,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:44,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:44,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:46,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:46,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:34:46,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:34:46,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2157 [2020-10-13 14:34:46,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:46,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:34:46,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:34:46,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 14:34:46,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:46,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:34:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:46,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:46,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:46,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:34:46,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:34:46,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:34:46,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:46,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:34:46,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:34:46,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:34:46,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:34:46,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001274462] [2020-10-13 14:34:46,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:34:46,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:34:46,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827913725] [2020-10-13 14:34:46,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:34:46,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:34:46,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:34:46,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:34:46,806 INFO L87 Difference]: Start difference. First operand 1120 states and 1593 transitions. Second operand 6 states. [2020-10-13 14:34:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:34:47,718 INFO L93 Difference]: Finished difference Result 4782 states and 6889 transitions. [2020-10-13 14:34:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 14:34:47,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-13 14:34:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:34:47,740 INFO L225 Difference]: With dead ends: 4782 [2020-10-13 14:34:47,741 INFO L226 Difference]: Without dead ends: 4026 [2020-10-13 14:34:47,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:34:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2020-10-13 14:34:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 1224. [2020-10-13 14:34:47,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1224 states. [2020-10-13 14:34:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1705 transitions. [2020-10-13 14:34:47,884 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1705 transitions. Word has length 57 [2020-10-13 14:34:47,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:34:47,884 INFO L479 AbstractCegarLoop]: Abstraction has 1224 states and 1705 transitions. [2020-10-13 14:34:47,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:34:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1705 transitions. [2020-10-13 14:34:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:34:47,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:47,887 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] [2020-10-13 14:34:47,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:34:47,887 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:47,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:47,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1491106980, now seen corresponding path program 1 times [2020-10-13 14:34:47,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:47,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035159769] [2020-10-13 14:34:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:47,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:47,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:47,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:48,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:48,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:49,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:49,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:34:49,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:34:49,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2048 [2020-10-13 14:34:49,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:49,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:34:49,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:34:49,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:34:49,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:50,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:34:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:50,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:50,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:50,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:34:50,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:34:50,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:34:50,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:50,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:34:50,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:34:50,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:34:50,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:34:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:34:50,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035159769] [2020-10-13 14:34:50,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:34:50,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:34:50,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931127139] [2020-10-13 14:34:50,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:34:50,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:34:50,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:34:50,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:34:50,132 INFO L87 Difference]: Start difference. First operand 1224 states and 1705 transitions. Second operand 6 states. [2020-10-13 14:34:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:34:51,399 INFO L93 Difference]: Finished difference Result 4346 states and 6098 transitions. [2020-10-13 14:34:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 14:34:51,400 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-13 14:34:51,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:34:51,422 INFO L225 Difference]: With dead ends: 4346 [2020-10-13 14:34:51,423 INFO L226 Difference]: Without dead ends: 3502 [2020-10-13 14:34:51,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:34:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2020-10-13 14:34:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 1266. [2020-10-13 14:34:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1266 states. [2020-10-13 14:34:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1731 transitions. [2020-10-13 14:34:51,621 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1731 transitions. Word has length 58 [2020-10-13 14:34:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:34:51,622 INFO L479 AbstractCegarLoop]: Abstraction has 1266 states and 1731 transitions. [2020-10-13 14:34:51,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:34:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1731 transitions. [2020-10-13 14:34:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:34:51,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:51,625 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] [2020-10-13 14:34:51,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:34:51,626 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:51,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:51,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1472408937, now seen corresponding path program 1 times [2020-10-13 14:34:51,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:51,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501442316] [2020-10-13 14:34:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:51,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:51,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:51,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:51,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:51,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:52,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:52,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:52,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:52,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:52,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:52,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:53,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:56,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:56,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:34:56,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:34:56,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:34:56,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:56,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:34:56,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:34:56,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:34:56,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:56,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:34:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:56,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:56,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:56,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:34:56,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:34:56,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:34:56,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:56,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:34:56,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:34:56,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:34:56,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:34:56,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501442316] [2020-10-13 14:34:56,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:34:56,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:34:56,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730418859] [2020-10-13 14:34:56,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:34:56,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:34:56,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:34:56,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:34:56,840 INFO L87 Difference]: Start difference. First operand 1266 states and 1731 transitions. Second operand 7 states. [2020-10-13 14:34:58,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:34:58,554 INFO L93 Difference]: Finished difference Result 7792 states and 11053 transitions. [2020-10-13 14:34:58,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:34:58,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-13 14:34:58,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:34:58,588 INFO L225 Difference]: With dead ends: 7792 [2020-10-13 14:34:58,588 INFO L226 Difference]: Without dead ends: 6666 [2020-10-13 14:34:58,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:34:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6666 states. [2020-10-13 14:34:58,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6666 to 4907. [2020-10-13 14:34:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4907 states. [2020-10-13 14:34:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4907 states to 4907 states and 6898 transitions. [2020-10-13 14:34:58,993 INFO L78 Accepts]: Start accepts. Automaton has 4907 states and 6898 transitions. Word has length 58 [2020-10-13 14:34:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:34:58,993 INFO L479 AbstractCegarLoop]: Abstraction has 4907 states and 6898 transitions. [2020-10-13 14:34:58,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:34:58,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4907 states and 6898 transitions. [2020-10-13 14:34:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:34:58,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:58,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:34:58,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:34:58,996 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:58,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:58,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1587501246, now seen corresponding path program 1 times [2020-10-13 14:34:58,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:58,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116041831] [2020-10-13 14:34:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:59,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:59,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:59,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:59,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:59,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:00,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:00,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:00,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:00,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:02,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:02,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:02,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:04,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:04,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:35:04,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:35:04,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:35:04,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:04,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:35:04,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:35:04,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:35:04,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:04,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:35:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:04,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:04,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:04,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:35:04,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:35:04,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:35:04,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:04,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:35:04,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:35:04,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:35:04,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:35:04,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116041831] [2020-10-13 14:35:04,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:35:04,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:35:04,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720499120] [2020-10-13 14:35:04,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:35:04,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:35:04,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:35:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:35:04,195 INFO L87 Difference]: Start difference. First operand 4907 states and 6898 transitions. Second operand 7 states. [2020-10-13 14:35:04,341 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-13 14:35:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:35:06,791 INFO L93 Difference]: Finished difference Result 27141 states and 38591 transitions. [2020-10-13 14:35:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:35:06,792 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-13 14:35:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:35:06,867 INFO L225 Difference]: With dead ends: 27141 [2020-10-13 14:35:06,867 INFO L226 Difference]: Without dead ends: 23243 [2020-10-13 14:35:06,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:35:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23243 states. [2020-10-13 14:35:07,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23243 to 7900. [2020-10-13 14:35:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7900 states. [2020-10-13 14:35:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 11229 transitions. [2020-10-13 14:35:07,736 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 11229 transitions. Word has length 59 [2020-10-13 14:35:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:35:07,736 INFO L479 AbstractCegarLoop]: Abstraction has 7900 states and 11229 transitions. [2020-10-13 14:35:07,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:35:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 11229 transitions. [2020-10-13 14:35:07,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:35:07,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:35:07,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:35:07,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:35:07,740 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:35:07,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:35:07,741 INFO L82 PathProgramCache]: Analyzing trace with hash -422943727, now seen corresponding path program 1 times [2020-10-13 14:35:07,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:35:07,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551503082] [2020-10-13 14:35:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:35:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:07,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:07,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:07,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:07,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:08,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:08,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:08,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:08,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:09,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:09,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:09,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:10,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:12,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:12,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:35:12,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:35:12,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:35:12,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:12,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:35:12,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:35:12,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:35:12,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:12,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:35:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:12,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:12,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:12,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:35:12,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:35:12,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:35:12,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:12,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:35:12,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:35:12,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:35:12,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:35:12,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551503082] [2020-10-13 14:35:12,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:35:12,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:35:12,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944943982] [2020-10-13 14:35:12,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:35:12,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:35:12,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:35:12,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:35:12,922 INFO L87 Difference]: Start difference. First operand 7900 states and 11229 transitions. Second operand 7 states. [2020-10-13 14:35:13,069 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-13 14:35:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:35:16,026 INFO L93 Difference]: Finished difference Result 37537 states and 53528 transitions. [2020-10-13 14:35:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:35:16,026 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-13 14:35:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:35:16,098 INFO L225 Difference]: With dead ends: 37537 [2020-10-13 14:35:16,098 INFO L226 Difference]: Without dead ends: 32235 [2020-10-13 14:35:16,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:35:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32235 states. [2020-10-13 14:35:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32235 to 17281. [2020-10-13 14:35:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17281 states. [2020-10-13 14:35:17,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17281 states to 17281 states and 24613 transitions. [2020-10-13 14:35:17,723 INFO L78 Accepts]: Start accepts. Automaton has 17281 states and 24613 transitions. Word has length 59 [2020-10-13 14:35:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:35:17,724 INFO L479 AbstractCegarLoop]: Abstraction has 17281 states and 24613 transitions. [2020-10-13 14:35:17,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:35:17,724 INFO L276 IsEmpty]: Start isEmpty. Operand 17281 states and 24613 transitions. [2020-10-13 14:35:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:35:17,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:35:17,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:35:17,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:35:17,729 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:35:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:35:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash -221206129, now seen corresponding path program 1 times [2020-10-13 14:35:17,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:35:17,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49308536] [2020-10-13 14:35:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:35:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:17,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:17,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:17,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:17,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:18,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:18,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:19,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:20,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:20,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:20,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:20,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:21,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:21,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:21,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:21,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:21,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:21,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:21,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:22,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:22,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:22,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:35:22,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 14:35:22,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:35:22,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:22,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 14:35:22,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:35:22,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:35:22,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:23,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:35:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:23,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:23,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:23,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:35:23,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:35:23,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:35:23,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:23,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:35:23,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:35:23,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:35:23,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:35:23,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49308536] [2020-10-13 14:35:23,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:35:23,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 14:35:23,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374738083] [2020-10-13 14:35:23,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 14:35:23,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:35:23,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 14:35:23,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:35:23,074 INFO L87 Difference]: Start difference. First operand 17281 states and 24613 transitions. Second operand 11 states. [2020-10-13 14:35:31,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:35:31,514 INFO L93 Difference]: Finished difference Result 132611 states and 186531 transitions. [2020-10-13 14:35:31,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 14:35:31,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-13 14:35:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:35:31,779 INFO L225 Difference]: With dead ends: 132611 [2020-10-13 14:35:31,779 INFO L226 Difference]: Without dead ends: 118935 [2020-10-13 14:35:31,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-10-13 14:35:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118935 states. [2020-10-13 14:35:34,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118935 to 17282. [2020-10-13 14:35:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17282 states. [2020-10-13 14:35:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17282 states to 17282 states and 24611 transitions. [2020-10-13 14:35:34,034 INFO L78 Accepts]: Start accepts. Automaton has 17282 states and 24611 transitions. Word has length 59 [2020-10-13 14:35:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:35:34,035 INFO L479 AbstractCegarLoop]: Abstraction has 17282 states and 24611 transitions. [2020-10-13 14:35:34,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 14:35:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 17282 states and 24611 transitions. [2020-10-13 14:35:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:35:34,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:35:34,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:35:34,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:35:34,040 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:35:34,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:35:34,040 INFO L82 PathProgramCache]: Analyzing trace with hash 771374794, now seen corresponding path program 1 times [2020-10-13 14:35:34,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:35:34,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360226584] [2020-10-13 14:35:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:35:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:34,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:34,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:34,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:34,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:34,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:34,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:35,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:38,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:38,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:35:38,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:35:38,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4394 [2020-10-13 14:35:38,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:38,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:35:38,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:35:38,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 14:35:38,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:38,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:35:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:38,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:38,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:38,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:35:38,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:35:38,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:35:38,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:38,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:35:38,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:35:38,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:35:38,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:35:38,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360226584] [2020-10-13 14:35:38,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:35:38,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:35:38,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198852498] [2020-10-13 14:35:38,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:35:38,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:35:38,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:35:38,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:35:38,604 INFO L87 Difference]: Start difference. First operand 17282 states and 24611 transitions. Second operand 6 states. [2020-10-13 14:35:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:35:45,941 INFO L93 Difference]: Finished difference Result 83436 states and 119476 transitions. [2020-10-13 14:35:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:35:45,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-13 14:35:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:35:46,036 INFO L225 Difference]: With dead ends: 83436 [2020-10-13 14:35:46,036 INFO L226 Difference]: Without dead ends: 70056 [2020-10-13 14:35:46,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:35:46,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70056 states. [2020-10-13 14:35:47,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70056 to 15496. [2020-10-13 14:35:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15496 states. [2020-10-13 14:35:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15496 states to 15496 states and 22102 transitions. [2020-10-13 14:35:47,787 INFO L78 Accepts]: Start accepts. Automaton has 15496 states and 22102 transitions. Word has length 59 [2020-10-13 14:35:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:35:47,787 INFO L479 AbstractCegarLoop]: Abstraction has 15496 states and 22102 transitions. [2020-10-13 14:35:47,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:35:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 15496 states and 22102 transitions. [2020-10-13 14:35:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:35:47,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:35:47,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:35:47,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:35:47,790 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:35:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:35:47,791 INFO L82 PathProgramCache]: Analyzing trace with hash -709174528, now seen corresponding path program 1 times [2020-10-13 14:35:47,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:35:47,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591756903] [2020-10-13 14:35:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:35:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:47,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:47,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:47,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:48,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:48,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:48,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:49,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:51,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:51,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:35:51,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:35:51,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3276 [2020-10-13 14:35:51,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:51,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:35:51,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:35:51,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:35:51,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:51,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:35:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:51,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:51,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:51,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:35:51,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:35:51,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:35:51,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:51,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:35:51,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:35:51,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:35:51,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:35:51,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591756903] [2020-10-13 14:35:51,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:35:51,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:35:51,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803229794] [2020-10-13 14:35:51,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:35:51,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:35:51,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:35:51,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:35:51,242 INFO L87 Difference]: Start difference. First operand 15496 states and 22102 transitions. Second operand 6 states. [2020-10-13 14:35:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:35:53,381 INFO L93 Difference]: Finished difference Result 21391 states and 30449 transitions. [2020-10-13 14:35:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:35:53,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-13 14:35:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:35:53,396 INFO L225 Difference]: With dead ends: 21391 [2020-10-13 14:35:53,396 INFO L226 Difference]: Without dead ends: 13741 [2020-10-13 14:35:53,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:35:53,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13741 states. [2020-10-13 14:35:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13741 to 13685. [2020-10-13 14:35:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13685 states. [2020-10-13 14:35:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13685 states to 13685 states and 19462 transitions. [2020-10-13 14:35:54,755 INFO L78 Accepts]: Start accepts. Automaton has 13685 states and 19462 transitions. Word has length 60 [2020-10-13 14:35:54,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:35:54,755 INFO L479 AbstractCegarLoop]: Abstraction has 13685 states and 19462 transitions. [2020-10-13 14:35:54,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:35:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 13685 states and 19462 transitions. [2020-10-13 14:35:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:35:54,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:35:54,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:35:54,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:35:54,758 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:35:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:35:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1575347795, now seen corresponding path program 1 times [2020-10-13 14:35:54,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:35:54,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376570801] [2020-10-13 14:35:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:35:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:54,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:54,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:54,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:54,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:55,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:55,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:55,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:55,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:55,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:55,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:55,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:55,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:56,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:56,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:56,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:56,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:56,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:56,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:56,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:58,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:59,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:59,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:35:59,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 14:35:59,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:35:59,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:59,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 14:35:59,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:35:59,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 14:35:59,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:36:00,006 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2020-10-13 14:36:00,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:36:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:36:00,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:00,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:36:00,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:36:00,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:36:00,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:36:00,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:36:00,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:36:00,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:36:00,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:36:00,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:36:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:36:00,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376570801] [2020-10-13 14:36:00,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:36:00,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 14:36:00,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336364837] [2020-10-13 14:36:00,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 14:36:00,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:36:00,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 14:36:00,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:36:00,200 INFO L87 Difference]: Start difference. First operand 13685 states and 19462 transitions. Second operand 11 states. [2020-10-13 14:36:00,391 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:36:09,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:36:09,284 INFO L93 Difference]: Finished difference Result 61439 states and 86668 transitions. [2020-10-13 14:36:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 14:36:09,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-13 14:36:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:36:09,355 INFO L225 Difference]: With dead ends: 61439 [2020-10-13 14:36:09,356 INFO L226 Difference]: Without dead ends: 54463 [2020-10-13 14:36:09,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:36:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54463 states. [2020-10-13 14:36:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54463 to 13665. [2020-10-13 14:36:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13665 states. [2020-10-13 14:36:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13665 states to 13665 states and 19428 transitions. [2020-10-13 14:36:11,198 INFO L78 Accepts]: Start accepts. Automaton has 13665 states and 19428 transitions. Word has length 60 [2020-10-13 14:36:11,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:36:11,198 INFO L479 AbstractCegarLoop]: Abstraction has 13665 states and 19428 transitions. [2020-10-13 14:36:11,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 14:36:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 13665 states and 19428 transitions. [2020-10-13 14:36:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:36:11,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:36:11,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:36:11,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:36:11,201 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:36:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:36:11,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1277281989, now seen corresponding path program 1 times [2020-10-13 14:36:11,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:36:11,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105688516] [2020-10-13 14:36:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:36:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:36:11,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:11,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:11,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:11,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:11,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:11,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:11,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:11,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:13,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:13,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:13,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:13,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:13,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:14,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:15,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:15,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:15,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:15,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:16,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:36:16,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:36:16,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 14:36:16,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:36:16,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:36:16,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:36:16,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:36:16,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 14:36:16,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:36:16,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:36:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:36:16,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:16,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:36:16,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:36:16,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:36:16,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:36:16,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:36:16,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:36:16,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:36:16,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:36:16,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:36:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:36:16,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105688516] [2020-10-13 14:36:16,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:36:16,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:36:16,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430991322] [2020-10-13 14:36:16,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:36:16,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:36:16,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:36:16,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:36:16,394 INFO L87 Difference]: Start difference. First operand 13665 states and 19428 transitions. Second operand 6 states. [2020-10-13 14:36:16,532 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-13 14:36:20,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:36:20,462 INFO L93 Difference]: Finished difference Result 36430 states and 51969 transitions. [2020-10-13 14:36:20,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:36:20,463 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-13 14:36:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:36:20,493 INFO L225 Difference]: With dead ends: 36430 [2020-10-13 14:36:20,494 INFO L226 Difference]: Without dead ends: 23972 [2020-10-13 14:36:20,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:36:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23972 states. [2020-10-13 14:36:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23972 to 18260. [2020-10-13 14:36:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18260 states. [2020-10-13 14:36:22,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18260 states to 18260 states and 26061 transitions. [2020-10-13 14:36:22,653 INFO L78 Accepts]: Start accepts. Automaton has 18260 states and 26061 transitions. Word has length 60 [2020-10-13 14:36:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:36:22,653 INFO L479 AbstractCegarLoop]: Abstraction has 18260 states and 26061 transitions. [2020-10-13 14:36:22,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:36:22,653 INFO L276 IsEmpty]: Start isEmpty. Operand 18260 states and 26061 transitions. [2020-10-13 14:36:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:36:22,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:36:22,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:36:22,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:36:22,656 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:36:22,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:36:22,657 INFO L82 PathProgramCache]: Analyzing trace with hash -478428082, now seen corresponding path program 1 times [2020-10-13 14:36:22,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:36:22,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371362157] [2020-10-13 14:36:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:36:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:36:22,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:22,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:22,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:22,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:22,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:22,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:23,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:23,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:24,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:24,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:26,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:27,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:36:27,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:36:27,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:36:27,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:36:27,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:36:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:36:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:36:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 14:36:27,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:36:27,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:36:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:36:27,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:27,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:36:27,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:36:27,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:36:27,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:36:27,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:36:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:36:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:36:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:36:27,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:36:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:36:28,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371362157] [2020-10-13 14:36:28,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:36:28,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:36:28,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093767141] [2020-10-13 14:36:28,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:36:28,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:36:28,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:36:28,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:36:28,003 INFO L87 Difference]: Start difference. First operand 18260 states and 26061 transitions. Second operand 12 states. [2020-10-13 14:36:28,193 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-13 14:36:49,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:36:49,586 INFO L93 Difference]: Finished difference Result 124655 states and 174057 transitions. [2020-10-13 14:36:49,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-13 14:36:49,586 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-10-13 14:36:49,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:36:49,731 INFO L225 Difference]: With dead ends: 124655 [2020-10-13 14:36:49,731 INFO L226 Difference]: Without dead ends: 116220 [2020-10-13 14:36:49,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=670, Invalid=3752, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 14:36:49,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116220 states. [2020-10-13 14:36:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116220 to 18299. [2020-10-13 14:36:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18299 states. [2020-10-13 14:36:52,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18299 states to 18299 states and 26119 transitions. [2020-10-13 14:36:52,993 INFO L78 Accepts]: Start accepts. Automaton has 18299 states and 26119 transitions. Word has length 60 [2020-10-13 14:36:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:36:52,994 INFO L479 AbstractCegarLoop]: Abstraction has 18299 states and 26119 transitions. [2020-10-13 14:36:52,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:36:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 18299 states and 26119 transitions. [2020-10-13 14:36:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 14:36:52,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:36:52,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:36:52,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:36:52,996 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:36:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:36:52,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1200190269, now seen corresponding path program 1 times [2020-10-13 14:36:52,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:36:52,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940949773] [2020-10-13 14:36:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:36:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:36:53,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:53,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:53,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:53,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:53,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:53,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:53,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:53,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:54,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:54,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:54,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:58,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:36:58,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 14:36:58,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:36:58,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:36:58,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:36:58,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:36:58,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:36:58,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 14:36:58,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:36:58,297 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 31 [2020-10-13 14:36:58,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:36:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:36:58,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:58,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:36:58,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:36:58,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:36:58,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:36:58,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:36:58,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:36:58,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:36:58,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:36:58,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:36:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:36:58,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940949773] [2020-10-13 14:36:58,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:36:58,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:36:58,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910865192] [2020-10-13 14:36:58,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:36:58,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:36:58,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:36:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:36:58,475 INFO L87 Difference]: Start difference. First operand 18299 states and 26119 transitions. Second operand 12 states. [2020-10-13 14:36:58,648 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-13 14:37:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:37:16,009 INFO L93 Difference]: Finished difference Result 93325 states and 131273 transitions. [2020-10-13 14:37:16,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 14:37:16,009 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-13 14:37:16,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:37:16,087 INFO L225 Difference]: With dead ends: 93325 [2020-10-13 14:37:16,088 INFO L226 Difference]: Without dead ends: 76639 [2020-10-13 14:37:16,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 14:37:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76639 states. [2020-10-13 14:37:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76639 to 18303. [2020-10-13 14:37:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18303 states. [2020-10-13 14:37:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18303 states to 18303 states and 26116 transitions. [2020-10-13 14:37:19,296 INFO L78 Accepts]: Start accepts. Automaton has 18303 states and 26116 transitions. Word has length 61 [2020-10-13 14:37:19,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:37:19,297 INFO L479 AbstractCegarLoop]: Abstraction has 18303 states and 26116 transitions. [2020-10-13 14:37:19,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:37:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 18303 states and 26116 transitions. [2020-10-13 14:37:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 14:37:19,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:37:19,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:37:19,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:37:19,299 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:37:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:37:19,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2088752994, now seen corresponding path program 1 times [2020-10-13 14:37:19,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:37:19,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30470320] [2020-10-13 14:37:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:37:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:19,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:19,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:19,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:19,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:19,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:19,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:19,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:19,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:19,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:19,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:21,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:23,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:23,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 14:37:23,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:37:23,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4332 [2020-10-13 14:37:23,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:37:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:37:23,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:37:23,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:37:23,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:37:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:23,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:23,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:23,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:37:23,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:37:23,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:37:23,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:23,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:37:23,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:37:23,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:37:23,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:37:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:37:23,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30470320] [2020-10-13 14:37:23,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:37:23,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:37:23,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406752832] [2020-10-13 14:37:23,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:37:23,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:37:23,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:37:23,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:37:23,810 INFO L87 Difference]: Start difference. First operand 18303 states and 26116 transitions. Second operand 6 states. [2020-10-13 14:37:23,948 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:37:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:37:26,023 INFO L93 Difference]: Finished difference Result 18343 states and 26154 transitions. [2020-10-13 14:37:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:37:26,024 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-13 14:37:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:37:26,034 INFO L225 Difference]: With dead ends: 18343 [2020-10-13 14:37:26,034 INFO L226 Difference]: Without dead ends: 9423 [2020-10-13 14:37:26,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:37:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9423 states. [2020-10-13 14:37:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9423 to 9385. [2020-10-13 14:37:27,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9385 states. [2020-10-13 14:37:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9385 states to 9385 states and 13336 transitions. [2020-10-13 14:37:27,555 INFO L78 Accepts]: Start accepts. Automaton has 9385 states and 13336 transitions. Word has length 61 [2020-10-13 14:37:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:37:27,555 INFO L479 AbstractCegarLoop]: Abstraction has 9385 states and 13336 transitions. [2020-10-13 14:37:27,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:37:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 9385 states and 13336 transitions. [2020-10-13 14:37:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 14:37:27,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:37:27,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:37:27,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:37:27,557 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:37:27,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:37:27,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1745764763, now seen corresponding path program 1 times [2020-10-13 14:37:27,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:37:27,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735789164] [2020-10-13 14:37:27,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:37:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:27,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:27,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:27,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:27,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:27,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:27,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:28,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:28,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:28,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:28,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:29,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:32,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:32,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 14:37:32,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:37:32,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:37:32,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:32,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:37:32,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:37:32,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:37:32,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:37:32,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:37:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:32,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:32,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:32,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:37:32,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:37:32,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:37:32,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:37:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:37:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:37:32,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:37:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:37:32,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735789164] [2020-10-13 14:37:32,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:37:32,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:37:32,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606328787] [2020-10-13 14:37:32,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:37:32,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:37:32,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:37:32,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:37:32,876 INFO L87 Difference]: Start difference. First operand 9385 states and 13336 transitions. Second operand 12 states. [2020-10-13 14:37:33,121 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:37:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:37:48,174 INFO L93 Difference]: Finished difference Result 78571 states and 109740 transitions. [2020-10-13 14:37:48,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 14:37:48,175 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-13 14:37:48,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:37:48,250 INFO L225 Difference]: With dead ends: 78571 [2020-10-13 14:37:48,250 INFO L226 Difference]: Without dead ends: 70112 [2020-10-13 14:37:48,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=1401, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 14:37:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70112 states. [2020-10-13 14:37:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70112 to 9380. [2020-10-13 14:37:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9380 states. [2020-10-13 14:37:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9380 states to 9380 states and 13328 transitions. [2020-10-13 14:37:50,352 INFO L78 Accepts]: Start accepts. Automaton has 9380 states and 13328 transitions. Word has length 61 [2020-10-13 14:37:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:37:50,352 INFO L479 AbstractCegarLoop]: Abstraction has 9380 states and 13328 transitions. [2020-10-13 14:37:50,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:37:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 9380 states and 13328 transitions. [2020-10-13 14:37:50,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 14:37:50,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:37:50,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:37:50,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:37:50,354 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:37:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:37:50,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1375392029, now seen corresponding path program 1 times [2020-10-13 14:37:50,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:37:50,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684660806] [2020-10-13 14:37:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:37:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:50,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:50,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:50,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:50,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 14:37:50,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:37:50,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-13 14:37:50,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:50,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:37:50,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:37:50,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 14:37:50,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:37:50,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:37:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:50,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:50,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:50,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:37:50,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:37:50,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:37:50,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:50,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:37:50,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:37:50,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:37:50,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:37:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:37:50,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684660806] [2020-10-13 14:37:50,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:37:50,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:37:50,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499060471] [2020-10-13 14:37:50,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:37:50,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:37:50,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:37:50,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:37:50,973 INFO L87 Difference]: Start difference. First operand 9380 states and 13328 transitions. Second operand 6 states. [2020-10-13 14:37:51,116 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-13 14:37:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:37:55,922 INFO L93 Difference]: Finished difference Result 30862 states and 44113 transitions. [2020-10-13 14:37:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:37:55,923 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-13 14:37:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:37:55,945 INFO L225 Difference]: With dead ends: 30862 [2020-10-13 14:37:55,946 INFO L226 Difference]: Without dead ends: 22508 [2020-10-13 14:37:55,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:37:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22508 states. [2020-10-13 14:37:58,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22508 to 11746. [2020-10-13 14:37:58,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11746 states. [2020-10-13 14:37:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11746 states to 11746 states and 16770 transitions. [2020-10-13 14:37:58,167 INFO L78 Accepts]: Start accepts. Automaton has 11746 states and 16770 transitions. Word has length 61 [2020-10-13 14:37:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:37:58,168 INFO L479 AbstractCegarLoop]: Abstraction has 11746 states and 16770 transitions. [2020-10-13 14:37:58,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:37:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 11746 states and 16770 transitions. [2020-10-13 14:37:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 14:37:58,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:37:58,170 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] [2020-10-13 14:37:58,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:37:58,170 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:37:58,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:37:58,170 INFO L82 PathProgramCache]: Analyzing trace with hash 941005032, now seen corresponding path program 1 times [2020-10-13 14:37:58,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:37:58,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176184728] [2020-10-13 14:37:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:37:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:58,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:58,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:58,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:58,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 14:37:58,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:37:58,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-13 14:37:58,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:58,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:37:58,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:37:58,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:37:58,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:37:58,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:37:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:58,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:58,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:58,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:37:58,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:37:58,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:37:58,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:58,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:37:58,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:37:58,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:37:58,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:37:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:37:58,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176184728] [2020-10-13 14:37:58,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:37:58,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-13 14:37:58,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706621796] [2020-10-13 14:37:58,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:37:58,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:37:58,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:37:58,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:37:58,974 INFO L87 Difference]: Start difference. First operand 11746 states and 16770 transitions. Second operand 10 states. [2020-10-13 14:37:59,125 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-13 14:38:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:38:05,545 INFO L93 Difference]: Finished difference Result 33736 states and 47941 transitions. [2020-10-13 14:38:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:38:05,546 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-10-13 14:38:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:38:05,571 INFO L225 Difference]: With dead ends: 33736 [2020-10-13 14:38:05,571 INFO L226 Difference]: Without dead ends: 25204 [2020-10-13 14:38:05,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-13 14:38:05,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25204 states. [2020-10-13 14:38:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25204 to 11669. [2020-10-13 14:38:08,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11669 states. [2020-10-13 14:38:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11669 states to 11669 states and 16655 transitions. [2020-10-13 14:38:08,019 INFO L78 Accepts]: Start accepts. Automaton has 11669 states and 16655 transitions. Word has length 62 [2020-10-13 14:38:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:38:08,019 INFO L479 AbstractCegarLoop]: Abstraction has 11669 states and 16655 transitions. [2020-10-13 14:38:08,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:38:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 11669 states and 16655 transitions. [2020-10-13 14:38:08,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 14:38:08,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:38:08,021 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] [2020-10-13 14:38:08,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:38:08,021 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:38:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:38:08,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2081488496, now seen corresponding path program 1 times [2020-10-13 14:38:08,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:38:08,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465616654] [2020-10-13 14:38:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:38:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:08,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:08,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:08,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:08,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 14:38:08,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:38:08,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-13 14:38:08,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:38:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:38:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 14:38:08,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:38:08,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:38:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:08,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:08,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:08,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:38:08,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:38:08,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:38:08,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:08,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:38:08,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:38:08,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:38:08,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:38:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:38:08,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465616654] [2020-10-13 14:38:08,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:38:08,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-13 14:38:08,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570470841] [2020-10-13 14:38:08,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:38:08,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:38:08,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:38:08,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:38:08,827 INFO L87 Difference]: Start difference. First operand 11669 states and 16655 transitions. Second operand 10 states. [2020-10-13 14:38:09,047 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127