/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 03:15:20,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 03:15:20,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 03:15:20,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 03:15:20,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 03:15:20,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 03:15:20,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 03:15:20,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 03:15:20,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 03:15:20,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 03:15:20,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 03:15:20,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 03:15:20,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 03:15:20,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 03:15:20,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 03:15:20,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 03:15:20,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 03:15:20,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 03:15:20,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 03:15:20,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 03:15:20,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 03:15:20,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 03:15:20,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 03:15:20,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 03:15:20,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 03:15:20,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 03:15:20,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 03:15:20,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 03:15:20,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 03:15:20,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 03:15:20,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 03:15:20,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 03:15:20,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 03:15:20,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 03:15:20,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 03:15:20,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 03:15:20,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 03:15:20,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 03:15:20,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 03:15:20,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 03:15:20,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 03:15:20,922 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 [2020-10-15 03:15:20,980 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 03:15:20,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 03:15:20,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 03:15:20,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 03:15:20,982 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 03:15:20,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 03:15:20,982 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 03:15:20,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 03:15:20,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 03:15:20,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 03:15:20,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 03:15:20,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 03:15:20,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 03:15:20,984 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 03:15:20,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 03:15:20,984 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 03:15:20,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 03:15:20,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 03:15:20,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 03:15:20,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 03:15:20,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 03:15:20,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:15:20,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 03:15:20,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 03:15:20,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 03:15:20,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 03:15:20,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 03:15:20,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 03:15:20,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 03:15:20,987 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 03:15:21,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 03:15:21,313 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 03:15:21,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 03:15:21,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 03:15:21,318 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 03:15:21,319 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-15 03:15:21,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4430b2c01/4d43d0e089f64be6a91edd5ee80b027e/FLAG8c933caaf [2020-10-15 03:15:22,032 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 03:15:22,033 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-15 03:15:22,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4430b2c01/4d43d0e089f64be6a91edd5ee80b027e/FLAG8c933caaf [2020-10-15 03:15:22,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4430b2c01/4d43d0e089f64be6a91edd5ee80b027e [2020-10-15 03:15:22,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 03:15:22,424 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 03:15:22,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 03:15:22,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 03:15:22,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 03:15:22,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:15:22" (1/1) ... [2020-10-15 03:15:22,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb5ca15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:22, skipping insertion in model container [2020-10-15 03:15:22,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:15:22" (1/1) ... [2020-10-15 03:15:22,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 03:15:22,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 03:15:22,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:15:22,927 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 03:15:23,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:15:23,033 INFO L208 MainTranslator]: Completed translation [2020-10-15 03:15:23,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:23 WrapperNode [2020-10-15 03:15:23,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 03:15:23,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 03:15:23,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 03:15:23,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 03:15:23,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:23" (1/1) ... [2020-10-15 03:15:23,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:23" (1/1) ... [2020-10-15 03:15:23,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:23" (1/1) ... [2020-10-15 03:15:23,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:23" (1/1) ... [2020-10-15 03:15:23,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:23" (1/1) ... [2020-10-15 03:15:23,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:23" (1/1) ... [2020-10-15 03:15:23,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:23" (1/1) ... [2020-10-15 03:15:23,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 03:15:23,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 03:15:23,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 03:15:23,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 03:15:23,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:23" (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 [2020-10-15 03:15:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 03:15:23,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 03:15:23,193 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 03:15:23,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 03:15:23,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 03:15:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 03:15:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 03:15:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-15 03:15:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 03:15:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 03:15:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-15 03:15:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-15 03:15:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-15 03:15:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-15 03:15:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-15 03:15:23,196 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-15 03:15:23,196 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-15 03:15:23,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 03:15:23,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 03:15:23,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 03:15:23,966 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 03:15:23,967 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 03:15:23,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:15:23 BoogieIcfgContainer [2020-10-15 03:15:23,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 03:15:23,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 03:15:23,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 03:15:23,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 03:15:23,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:15:22" (1/3) ... [2020-10-15 03:15:23,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72eaed4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:15:23, skipping insertion in model container [2020-10-15 03:15:23,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:23" (2/3) ... [2020-10-15 03:15:23,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72eaed4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:15:23, skipping insertion in model container [2020-10-15 03:15:23,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:15:23" (3/3) ... [2020-10-15 03:15:23,981 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-15 03:15:23,993 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 03:15:24,001 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 03:15:24,018 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 03:15:24,049 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 03:15:24,050 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 03:15:24,050 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 03:15:24,050 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 03:15:24,050 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 03:15:24,051 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 03:15:24,051 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 03:15:24,051 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 03:15:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-10-15 03:15:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 03:15:24,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:24,087 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] [2020-10-15 03:15:24,087 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:24,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1803074216, now seen corresponding path program 1 times [2020-10-15 03:15:24,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:24,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117142258] [2020-10-15 03:15:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:24,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:24,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:24,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:25,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:25,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:25,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 03:15:25,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:15:25,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1471 [2020-10-15 03:15:25,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:25,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:25,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:25,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:15:25,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 03:15:25,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 03:15:26,360 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-15 03:15:26,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:26,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:26,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:26,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:26,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:26,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:15:26,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:26,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:26,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:26,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:26,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:26,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:26,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117142258] [2020-10-15 03:15:26,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:26,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:15:26,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165896322] [2020-10-15 03:15:26,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:26,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:26,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:26,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:26,440 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 6 states. [2020-10-15 03:15:26,787 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-15 03:15:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:27,796 INFO L93 Difference]: Finished difference Result 331 states and 516 transitions. [2020-10-15 03:15:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:15:27,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-10-15 03:15:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:27,815 INFO L225 Difference]: With dead ends: 331 [2020-10-15 03:15:27,816 INFO L226 Difference]: Without dead ends: 263 [2020-10-15 03:15:27,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:15:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-15 03:15:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 101. [2020-10-15 03:15:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 03:15:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 146 transitions. [2020-10-15 03:15:27,900 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 146 transitions. Word has length 40 [2020-10-15 03:15:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:27,901 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 146 transitions. [2020-10-15 03:15:27,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 146 transitions. [2020-10-15 03:15:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 03:15:27,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:27,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:27,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 03:15:27,905 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:27,906 INFO L82 PathProgramCache]: Analyzing trace with hash -713813853, now seen corresponding path program 1 times [2020-10-15 03:15:27,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:27,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919643736] [2020-10-15 03:15:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:27,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:27,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:28,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:28,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:28,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:28,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:30,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:30,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 03:15:30,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:15:30,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2506 [2020-10-15 03:15:30,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:30,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:15:30,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 03:15:30,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:30,754 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-15 03:15:30,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:30,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:30,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:30,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:30,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:30,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:15:30,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:30,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:30,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:30,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:30,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:30,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:30,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919643736] [2020-10-15 03:15:30,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:30,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:15:30,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990147145] [2020-10-15 03:15:30,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:30,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:30,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:30,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:30,787 INFO L87 Difference]: Start difference. First operand 101 states and 146 transitions. Second operand 6 states. [2020-10-15 03:15:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:31,374 INFO L93 Difference]: Finished difference Result 439 states and 675 transitions. [2020-10-15 03:15:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:15:31,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-15 03:15:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:31,379 INFO L225 Difference]: With dead ends: 439 [2020-10-15 03:15:31,379 INFO L226 Difference]: Without dead ends: 361 [2020-10-15 03:15:31,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:15:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-15 03:15:31,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 211. [2020-10-15 03:15:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-15 03:15:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 320 transitions. [2020-10-15 03:15:31,411 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 320 transitions. Word has length 42 [2020-10-15 03:15:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:31,412 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 320 transitions. [2020-10-15 03:15:31,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 320 transitions. [2020-10-15 03:15:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 03:15:31,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:31,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:31,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 03:15:31,415 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:31,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:31,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1539321490, now seen corresponding path program 1 times [2020-10-15 03:15:31,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:31,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130434580] [2020-10-15 03:15:31,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:31,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:31,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:31,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:31,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:32,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:32,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 03:15:32,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:15:32,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1038 [2020-10-15 03:15:32,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:32,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:32,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:32,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:15:32,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 03:15:32,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:32,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:32,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:32,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:32,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:32,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:32,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:15:32,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:32,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:32,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:32,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:15:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:32,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130434580] [2020-10-15 03:15:32,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:32,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:15:32,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104217367] [2020-10-15 03:15:32,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:32,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:32,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:32,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:32,690 INFO L87 Difference]: Start difference. First operand 211 states and 320 transitions. Second operand 6 states. [2020-10-15 03:15:33,181 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-15 03:15:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:33,570 INFO L93 Difference]: Finished difference Result 667 states and 1032 transitions. [2020-10-15 03:15:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:15:33,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-15 03:15:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:33,574 INFO L225 Difference]: With dead ends: 667 [2020-10-15 03:15:33,574 INFO L226 Difference]: Without dead ends: 479 [2020-10-15 03:15:33,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:15:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-10-15 03:15:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 211. [2020-10-15 03:15:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-15 03:15:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 318 transitions. [2020-10-15 03:15:33,600 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 318 transitions. Word has length 42 [2020-10-15 03:15:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:33,600 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 318 transitions. [2020-10-15 03:15:33,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 318 transitions. [2020-10-15 03:15:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 03:15:33,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:33,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:33,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 03:15:33,603 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:33,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1519272147, now seen corresponding path program 1 times [2020-10-15 03:15:33,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:33,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563076520] [2020-10-15 03:15:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:33,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:33,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:33,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:33,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:33,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:33,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:34,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:34,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 03:15:34,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:15:34,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1053 [2020-10-15 03:15:34,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:34,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:34,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:15:34,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:15:34,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 03:15:34,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-15 03:15:34,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:34,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:34,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:34,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:34,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:34,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:15:34,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:34,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:34,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:34,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:34,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:34,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:34,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563076520] [2020-10-15 03:15:34,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:34,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:15:34,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431523095] [2020-10-15 03:15:34,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:15:34,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:34,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:15:34,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:15:34,853 INFO L87 Difference]: Start difference. First operand 211 states and 318 transitions. Second operand 5 states. [2020-10-15 03:15:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:35,322 INFO L93 Difference]: Finished difference Result 743 states and 1148 transitions. [2020-10-15 03:15:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:15:35,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-10-15 03:15:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:35,327 INFO L225 Difference]: With dead ends: 743 [2020-10-15 03:15:35,327 INFO L226 Difference]: Without dead ends: 555 [2020-10-15 03:15:35,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-15 03:15:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 551. [2020-10-15 03:15:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-10-15 03:15:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 839 transitions. [2020-10-15 03:15:35,405 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 839 transitions. Word has length 42 [2020-10-15 03:15:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:35,406 INFO L479 AbstractCegarLoop]: Abstraction has 551 states and 839 transitions. [2020-10-15 03:15:35,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:15:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 839 transitions. [2020-10-15 03:15:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 03:15:35,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:35,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:35,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 03:15:35,409 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:35,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:35,409 INFO L82 PathProgramCache]: Analyzing trace with hash -690068631, now seen corresponding path program 1 times [2020-10-15 03:15:35,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:35,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687777830] [2020-10-15 03:15:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:35,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:35,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:35,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:35,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:35,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:36,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:37,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:37,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 03:15:37,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:15:37,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2114 [2020-10-15 03:15:37,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:37,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:37,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:15:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 03:15:37,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:37,954 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-15 03:15:37,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:37,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:37,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:37,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:37,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:37,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:15:37,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:37,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:37,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:37,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:37,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687777830] [2020-10-15 03:15:37,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:37,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:15:37,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99243786] [2020-10-15 03:15:37,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:38,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:38,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:38,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:38,000 INFO L87 Difference]: Start difference. First operand 551 states and 839 transitions. Second operand 6 states. [2020-10-15 03:15:38,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:38,556 INFO L93 Difference]: Finished difference Result 1449 states and 2212 transitions. [2020-10-15 03:15:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:15:38,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-15 03:15:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:38,567 INFO L225 Difference]: With dead ends: 1449 [2020-10-15 03:15:38,567 INFO L226 Difference]: Without dead ends: 1135 [2020-10-15 03:15:38,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:15:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2020-10-15 03:15:38,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 873. [2020-10-15 03:15:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2020-10-15 03:15:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1333 transitions. [2020-10-15 03:15:38,700 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1333 transitions. Word has length 42 [2020-10-15 03:15:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:38,701 INFO L479 AbstractCegarLoop]: Abstraction has 873 states and 1333 transitions. [2020-10-15 03:15:38,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:38,702 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1333 transitions. [2020-10-15 03:15:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 03:15:38,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:38,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:38,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 03:15:38,709 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1086339747, now seen corresponding path program 1 times [2020-10-15 03:15:38,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:38,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647298664] [2020-10-15 03:15:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:38,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:38,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:38,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:38,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:38,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:39,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:41,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:41,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 03:15:41,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:15:41,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2275 [2020-10-15 03:15:41,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:41,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 03:15:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 03:15:41,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:41,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:41,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:41,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:41,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:41,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:41,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:15:41,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:41,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:41,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:41,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647298664] [2020-10-15 03:15:41,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:41,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:15:41,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157020173] [2020-10-15 03:15:41,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:41,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:41,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:41,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:41,150 INFO L87 Difference]: Start difference. First operand 873 states and 1333 transitions. Second operand 6 states. [2020-10-15 03:15:41,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:41,685 INFO L93 Difference]: Finished difference Result 1583 states and 2417 transitions. [2020-10-15 03:15:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:15:41,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-15 03:15:41,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:41,694 INFO L225 Difference]: With dead ends: 1583 [2020-10-15 03:15:41,694 INFO L226 Difference]: Without dead ends: 1376 [2020-10-15 03:15:41,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:15:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2020-10-15 03:15:41,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1015. [2020-10-15 03:15:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-10-15 03:15:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1552 transitions. [2020-10-15 03:15:41,782 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1552 transitions. Word has length 42 [2020-10-15 03:15:41,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:41,782 INFO L479 AbstractCegarLoop]: Abstraction has 1015 states and 1552 transitions. [2020-10-15 03:15:41,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1552 transitions. [2020-10-15 03:15:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 03:15:41,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:41,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:41,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 03:15:41,787 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:41,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:41,787 INFO L82 PathProgramCache]: Analyzing trace with hash 472416514, now seen corresponding path program 1 times [2020-10-15 03:15:41,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:41,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021649251] [2020-10-15 03:15:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:41,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:41,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:41,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:42,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:42,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 03:15:42,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:15:42,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-10-15 03:15:42,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:42,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:42,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:15:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 03:15:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 03:15:42,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:15:42,921 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-15 03:15:42,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:42,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:42,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:42,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:42,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:42,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-15 03:15:42,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:42,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:42,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:42,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:42,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:42,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021649251] [2020-10-15 03:15:42,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:42,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:15:42,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208647381] [2020-10-15 03:15:42,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:15:42,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:42,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:15:42,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:15:42,959 INFO L87 Difference]: Start difference. First operand 1015 states and 1552 transitions. Second operand 4 states. [2020-10-15 03:15:43,093 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-15 03:15:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:43,568 INFO L93 Difference]: Finished difference Result 2280 states and 3501 transitions. [2020-10-15 03:15:43,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:15:43,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-15 03:15:43,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:43,579 INFO L225 Difference]: With dead ends: 2280 [2020-10-15 03:15:43,579 INFO L226 Difference]: Without dead ends: 1574 [2020-10-15 03:15:43,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:15:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2020-10-15 03:15:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1572. [2020-10-15 03:15:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1572 states. [2020-10-15 03:15:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2389 transitions. [2020-10-15 03:15:43,740 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2389 transitions. Word has length 43 [2020-10-15 03:15:43,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:43,740 INFO L479 AbstractCegarLoop]: Abstraction has 1572 states and 2389 transitions. [2020-10-15 03:15:43,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:15:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2389 transitions. [2020-10-15 03:15:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 03:15:43,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:43,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:43,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 03:15:43,743 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:43,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1899572273, now seen corresponding path program 1 times [2020-10-15 03:15:43,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:43,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427286871] [2020-10-15 03:15:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:43,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:43,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:43,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:44,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:44,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:44,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 03:15:44,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:15:44,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-15 03:15:44,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:44,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:44,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:44,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:15:44,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 03:15:44,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 03:15:44,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:44,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:44,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:44,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:44,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:44,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-15 03:15:44,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:44,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:15:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:15:44,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:44,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427286871] [2020-10-15 03:15:44,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:44,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:15:44,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803771940] [2020-10-15 03:15:44,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:44,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:44,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:44,956 INFO L87 Difference]: Start difference. First operand 1572 states and 2389 transitions. Second operand 6 states. [2020-10-15 03:15:45,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:45,542 INFO L93 Difference]: Finished difference Result 4267 states and 6496 transitions. [2020-10-15 03:15:45,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:15:45,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-15 03:15:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:45,557 INFO L225 Difference]: With dead ends: 4267 [2020-10-15 03:15:45,558 INFO L226 Difference]: Without dead ends: 2720 [2020-10-15 03:15:45,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:15:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2020-10-15 03:15:45,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2718. [2020-10-15 03:15:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2718 states. [2020-10-15 03:15:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 4103 transitions. [2020-10-15 03:15:45,826 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 4103 transitions. Word has length 44 [2020-10-15 03:15:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:45,827 INFO L479 AbstractCegarLoop]: Abstraction has 2718 states and 4103 transitions. [2020-10-15 03:15:45,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 4103 transitions. [2020-10-15 03:15:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 03:15:45,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:45,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:45,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 03:15:45,829 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash 487150538, now seen corresponding path program 1 times [2020-10-15 03:15:45,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:45,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87504424] [2020-10-15 03:15:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:45,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:45,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:45,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:46,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:46,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 03:15:46,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:15:46,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-15 03:15:46,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:46,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:15:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-15 03:15:46,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 03:15:46,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:46,491 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-15 03:15:46,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:46,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:46,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:46,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:46,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:46,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:15:46,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:46,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:46,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:46,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:46,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:46,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87504424] [2020-10-15 03:15:46,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:46,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:15:46,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928759150] [2020-10-15 03:15:46,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:15:46,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:46,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:15:46,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:15:46,526 INFO L87 Difference]: Start difference. First operand 2718 states and 4103 transitions. Second operand 4 states. [2020-10-15 03:15:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:47,303 INFO L93 Difference]: Finished difference Result 7440 states and 11180 transitions. [2020-10-15 03:15:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:15:47,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-15 03:15:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:47,328 INFO L225 Difference]: With dead ends: 7440 [2020-10-15 03:15:47,328 INFO L226 Difference]: Without dead ends: 4747 [2020-10-15 03:15:47,337 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 [2020-10-15 03:15:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2020-10-15 03:15:47,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 4745. [2020-10-15 03:15:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4745 states. [2020-10-15 03:15:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4745 states to 4745 states and 7018 transitions. [2020-10-15 03:15:47,847 INFO L78 Accepts]: Start accepts. Automaton has 4745 states and 7018 transitions. Word has length 44 [2020-10-15 03:15:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:47,848 INFO L479 AbstractCegarLoop]: Abstraction has 4745 states and 7018 transitions. [2020-10-15 03:15:47,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:15:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4745 states and 7018 transitions. [2020-10-15 03:15:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-15 03:15:47,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:47,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:47,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 03:15:47,849 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:47,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:47,850 INFO L82 PathProgramCache]: Analyzing trace with hash 505769690, now seen corresponding path program 1 times [2020-10-15 03:15:47,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:47,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160429659] [2020-10-15 03:15:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:47,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:47,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:48,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:48,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:48,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 03:15:48,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:15:48,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-15 03:15:48,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:48,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:48,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:48,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:15:48,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 03:15:48,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:15:48,682 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2020-10-15 03:15:48,906 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-15 03:15:48,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:48,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:48,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:48,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:48,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:48,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-15 03:15:48,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:48,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:48,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:15:48,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:48,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:15:48,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:48,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160429659] [2020-10-15 03:15:48,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:48,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:15:48,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274917536] [2020-10-15 03:15:48,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:48,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:48,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:48,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:48,945 INFO L87 Difference]: Start difference. First operand 4745 states and 7018 transitions. Second operand 6 states. [2020-10-15 03:15:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:50,419 INFO L93 Difference]: Finished difference Result 14102 states and 20838 transitions. [2020-10-15 03:15:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:15:50,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-15 03:15:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:50,463 INFO L225 Difference]: With dead ends: 14102 [2020-10-15 03:15:50,464 INFO L226 Difference]: Without dead ends: 9382 [2020-10-15 03:15:50,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:15:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9382 states. [2020-10-15 03:15:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9382 to 9380. [2020-10-15 03:15:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9380 states. [2020-10-15 03:15:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9380 states to 9380 states and 13761 transitions. [2020-10-15 03:15:51,397 INFO L78 Accepts]: Start accepts. Automaton has 9380 states and 13761 transitions. Word has length 45 [2020-10-15 03:15:51,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:51,398 INFO L479 AbstractCegarLoop]: Abstraction has 9380 states and 13761 transitions. [2020-10-15 03:15:51,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:51,398 INFO L276 IsEmpty]: Start isEmpty. Operand 9380 states and 13761 transitions. [2020-10-15 03:15:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-15 03:15:51,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:51,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:51,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 03:15:51,399 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:51,400 INFO L82 PathProgramCache]: Analyzing trace with hash -159046571, now seen corresponding path program 1 times [2020-10-15 03:15:51,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:51,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416232106] [2020-10-15 03:15:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:51,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:51,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:51,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 03:15:51,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:15:51,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-15 03:15:51,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:51,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:15:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-15 03:15:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 03:15:51,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:15:51,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:51,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:51,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:51,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:51,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:51,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:15:51,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:51,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:51,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:51,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:51,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:51,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:51,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416232106] [2020-10-15 03:15:51,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:51,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:15:51,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243392904] [2020-10-15 03:15:51,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:15:51,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:51,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:15:51,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:15:51,664 INFO L87 Difference]: Start difference. First operand 9380 states and 13761 transitions. Second operand 4 states. [2020-10-15 03:15:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:53,243 INFO L93 Difference]: Finished difference Result 25434 states and 36917 transitions. [2020-10-15 03:15:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:15:53,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-15 03:15:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:53,318 INFO L225 Difference]: With dead ends: 25434 [2020-10-15 03:15:53,318 INFO L226 Difference]: Without dead ends: 16079 [2020-10-15 03:15:53,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:15:53,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16079 states. [2020-10-15 03:15:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16079 to 16077. [2020-10-15 03:15:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16077 states. [2020-10-15 03:15:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16077 states to 16077 states and 22848 transitions. [2020-10-15 03:15:54,920 INFO L78 Accepts]: Start accepts. Automaton has 16077 states and 22848 transitions. Word has length 45 [2020-10-15 03:15:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:54,920 INFO L479 AbstractCegarLoop]: Abstraction has 16077 states and 22848 transitions. [2020-10-15 03:15:54,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:15:54,920 INFO L276 IsEmpty]: Start isEmpty. Operand 16077 states and 22848 transitions. [2020-10-15 03:15:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 03:15:54,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:54,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:54,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 03:15:54,922 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:54,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1653708042, now seen corresponding path program 1 times [2020-10-15 03:15:54,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:54,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050404495] [2020-10-15 03:15:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:54,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:55,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:55,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:55,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 03:15:55,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:15:55,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 745 [2020-10-15 03:15:55,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:55,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:55,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:55,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:15:55,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 03:15:55,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:55,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:55,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:55,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:55,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:55,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:55,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:15:55,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:55,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:55,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:15:55,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:55,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:15:55,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:55,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050404495] [2020-10-15 03:15:55,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:55,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:15:55,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133362571] [2020-10-15 03:15:55,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:55,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:55,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:55,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:55,821 INFO L87 Difference]: Start difference. First operand 16077 states and 22848 transitions. Second operand 6 states. [2020-10-15 03:15:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:58,163 INFO L93 Difference]: Finished difference Result 47849 states and 67830 transitions. [2020-10-15 03:15:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:15:58,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-15 03:15:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:58,263 INFO L225 Difference]: With dead ends: 47849 [2020-10-15 03:15:58,264 INFO L226 Difference]: Without dead ends: 31797 [2020-10-15 03:15:58,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:15:58,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31797 states. [2020-10-15 03:16:00,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31797 to 31795. [2020-10-15 03:16:00,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31795 states. [2020-10-15 03:16:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31795 states to 31795 states and 44674 transitions. [2020-10-15 03:16:00,971 INFO L78 Accepts]: Start accepts. Automaton has 31795 states and 44674 transitions. Word has length 46 [2020-10-15 03:16:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:16:00,971 INFO L479 AbstractCegarLoop]: Abstraction has 31795 states and 44674 transitions. [2020-10-15 03:16:00,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:16:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 31795 states and 44674 transitions. [2020-10-15 03:16:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 03:16:00,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:16:00,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:16:00,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 03:16:00,973 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:16:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:16:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2111968753, now seen corresponding path program 1 times [2020-10-15 03:16:00,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:16:00,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869474861] [2020-10-15 03:16:00,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:16:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:01,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:01,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:01,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 03:16:01,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:16:01,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-15 03:16:01,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:01,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:01,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:16:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-15 03:16:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-15 03:16:01,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:16:01,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:16:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:01,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:01,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:01,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:16:01,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:16:01,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:16:01,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:01,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:01,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:16:01,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:16:01,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:16:01,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:16:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:16:01,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869474861] [2020-10-15 03:16:01,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:16:01,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:16:01,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780104627] [2020-10-15 03:16:01,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:16:01,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:16:01,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:16:01,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:16:01,245 INFO L87 Difference]: Start difference. First operand 31795 states and 44674 transitions. Second operand 5 states. [2020-10-15 03:16:05,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:16:05,314 INFO L93 Difference]: Finished difference Result 50237 states and 70402 transitions. [2020-10-15 03:16:05,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:16:05,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-15 03:16:05,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:16:05,443 INFO L225 Difference]: With dead ends: 50237 [2020-10-15 03:16:05,443 INFO L226 Difference]: Without dead ends: 50235 [2020-10-15 03:16:05,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:16:05,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50235 states. [2020-10-15 03:16:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50235 to 32947. [2020-10-15 03:16:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32947 states. [2020-10-15 03:16:08,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32947 states to 32947 states and 45474 transitions. [2020-10-15 03:16:08,912 INFO L78 Accepts]: Start accepts. Automaton has 32947 states and 45474 transitions. Word has length 46 [2020-10-15 03:16:08,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:16:08,912 INFO L479 AbstractCegarLoop]: Abstraction has 32947 states and 45474 transitions. [2020-10-15 03:16:08,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:16:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 32947 states and 45474 transitions. [2020-10-15 03:16:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 03:16:08,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:16:08,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:16:08,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 03:16:08,921 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:16:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:16:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1970498434, now seen corresponding path program 1 times [2020-10-15 03:16:08,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:16:08,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522254667] [2020-10-15 03:16:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:16:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:08,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:09,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:09,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:09,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:09,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:09,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:10,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:10,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:12,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:12,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:12,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:13,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:13,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 03:16:13,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-15 03:16:13,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 03:16:13,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:13,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:13,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:16:13,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:16:13,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 03:16:13,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:16:14,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:16:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:14,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:14,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:14,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:16:14,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:16:14,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:16:14,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:14,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:14,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:16:14,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:16:14,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:16:14,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:16:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:16:14,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522254667] [2020-10-15 03:16:14,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:16:14,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 03:16:14,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068652829] [2020-10-15 03:16:14,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:16:14,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:16:14,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:16:14,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:16:14,335 INFO L87 Difference]: Start difference. First operand 32947 states and 45474 transitions. Second operand 9 states. [2020-10-15 03:16:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:16:25,401 INFO L93 Difference]: Finished difference Result 137177 states and 186521 transitions. [2020-10-15 03:16:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 03:16:25,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-10-15 03:16:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:16:25,594 INFO L225 Difference]: With dead ends: 137177 [2020-10-15 03:16:25,595 INFO L226 Difference]: Without dead ends: 104255 [2020-10-15 03:16:25,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2020-10-15 03:16:25,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104255 states. [2020-10-15 03:16:31,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104255 to 57174. [2020-10-15 03:16:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57174 states. [2020-10-15 03:16:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57174 states to 57174 states and 78527 transitions. [2020-10-15 03:16:31,300 INFO L78 Accepts]: Start accepts. Automaton has 57174 states and 78527 transitions. Word has length 66 [2020-10-15 03:16:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:16:31,301 INFO L479 AbstractCegarLoop]: Abstraction has 57174 states and 78527 transitions. [2020-10-15 03:16:31,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:16:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 57174 states and 78527 transitions. [2020-10-15 03:16:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 03:16:31,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:16:31,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:16:31,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 03:16:31,311 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:16:31,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:16:31,318 INFO L82 PathProgramCache]: Analyzing trace with hash 95078741, now seen corresponding path program 1 times [2020-10-15 03:16:31,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:16:31,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802568927] [2020-10-15 03:16:31,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:16:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:31,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:31,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:31,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:31,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:32,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:33,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:33,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:33,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:33,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:33,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:33,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:33,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:33,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:34,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:34,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:36,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:36,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:36,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:36,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 03:16:36,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-15 03:16:36,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-15 03:16:36,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:36,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:36,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:16:36,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:16:36,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-15 03:16:36,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:16:36,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:16:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:36,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:36,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:36,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:16:36,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:16:36,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:16:36,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:36,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:36,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:16:36,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:16:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:16:36,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:16:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:16:36,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802568927] [2020-10-15 03:16:36,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:16:36,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 03:16:36,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361093912] [2020-10-15 03:16:36,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:16:36,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:16:36,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:16:36,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:16:36,674 INFO L87 Difference]: Start difference. First operand 57174 states and 78527 transitions. Second operand 10 states. [2020-10-15 03:16:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:16:49,694 INFO L93 Difference]: Finished difference Result 134697 states and 183024 transitions. [2020-10-15 03:16:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 03:16:49,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-15 03:16:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:16:49,867 INFO L225 Difference]: With dead ends: 134697 [2020-10-15 03:16:49,867 INFO L226 Difference]: Without dead ends: 104414 [2020-10-15 03:16:49,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-15 03:16:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104414 states. [2020-10-15 03:16:55,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104414 to 58170. [2020-10-15 03:16:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58170 states. [2020-10-15 03:16:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58170 states to 58170 states and 80021 transitions. [2020-10-15 03:16:58,077 INFO L78 Accepts]: Start accepts. Automaton has 58170 states and 80021 transitions. Word has length 66 [2020-10-15 03:16:58,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:16:58,077 INFO L479 AbstractCegarLoop]: Abstraction has 58170 states and 80021 transitions. [2020-10-15 03:16:58,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:16:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 58170 states and 80021 transitions. [2020-10-15 03:16:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-15 03:16:58,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:16:58,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:16:58,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 03:16:58,083 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:16:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:16:58,085 INFO L82 PathProgramCache]: Analyzing trace with hash -176393212, now seen corresponding path program 1 times [2020-10-15 03:16:58,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:16:58,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284264857] [2020-10-15 03:16:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:16:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:58,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:58,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:58,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:58,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:00,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:00,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-15 03:17:00,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:17:00,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2781 [2020-10-15 03:17:00,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:00,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:00,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:17:00,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:17:00,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 03:17:00,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:17:01,079 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 18 [2020-10-15 03:17:01,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:17:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:01,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:01,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:01,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:17:01,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:17:01,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:17:01,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:01,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:01,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:17:01,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:17:01,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:17:01,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:17:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:17:01,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284264857] [2020-10-15 03:17:01,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:17:01,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 03:17:01,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388846261] [2020-10-15 03:17:01,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:17:01,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:17:01,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:17:01,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:17:01,266 INFO L87 Difference]: Start difference. First operand 58170 states and 80021 transitions. Second operand 9 states. [2020-10-15 03:17:01,443 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-15 03:17:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:17:20,053 INFO L93 Difference]: Finished difference Result 198903 states and 271420 transitions. [2020-10-15 03:17:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 03:17:20,054 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-15 03:17:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:17:20,326 INFO L225 Difference]: With dead ends: 198903 [2020-10-15 03:17:20,326 INFO L226 Difference]: Without dead ends: 161151 [2020-10-15 03:17:20,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-15 03:17:20,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161151 states. [2020-10-15 03:17:33,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161151 to 91151. [2020-10-15 03:17:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91151 states. [2020-10-15 03:17:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91151 states to 91151 states and 124950 transitions. [2020-10-15 03:17:33,953 INFO L78 Accepts]: Start accepts. Automaton has 91151 states and 124950 transitions. Word has length 67 [2020-10-15 03:17:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:17:33,953 INFO L479 AbstractCegarLoop]: Abstraction has 91151 states and 124950 transitions. [2020-10-15 03:17:33,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:17:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 91151 states and 124950 transitions. [2020-10-15 03:17:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-15 03:17:33,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:17:33,956 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:17:33,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 03:17:33,956 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:17:33,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:17:33,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1029021339, now seen corresponding path program 1 times [2020-10-15 03:17:33,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:17:33,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263864854] [2020-10-15 03:17:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:17:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:33,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:33,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:34,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:34,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:34,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:35,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:35,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-15 03:17:35,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:17:35,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1814 [2020-10-15 03:17:35,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:35,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:17:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:17:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 03:17:35,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:17:36,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:17:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:36,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:36,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:36,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:17:36,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:17:36,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:17:36,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:36,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:36,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:17:36,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:17:36,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:17:36,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:17:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:17:36,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263864854] [2020-10-15 03:17:36,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:17:36,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 03:17:36,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804343668] [2020-10-15 03:17:36,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:17:36,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:17:36,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:17:36,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:17:36,110 INFO L87 Difference]: Start difference. First operand 91151 states and 124950 transitions. Second operand 10 states. [2020-10-15 03:17:59,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:17:59,058 INFO L93 Difference]: Finished difference Result 189245 states and 258251 transitions. [2020-10-15 03:17:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 03:17:59,059 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-15 03:17:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:17:59,324 INFO L225 Difference]: With dead ends: 189245 [2020-10-15 03:17:59,324 INFO L226 Difference]: Without dead ends: 160085 [2020-10-15 03:17:59,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2020-10-15 03:17:59,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160085 states. [2020-10-15 03:18:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160085 to 91543. [2020-10-15 03:18:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91543 states. [2020-10-15 03:18:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91543 states to 91543 states and 125538 transitions. [2020-10-15 03:18:14,663 INFO L78 Accepts]: Start accepts. Automaton has 91543 states and 125538 transitions. Word has length 67 [2020-10-15 03:18:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:14,664 INFO L479 AbstractCegarLoop]: Abstraction has 91543 states and 125538 transitions. [2020-10-15 03:18:14,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:18:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 91543 states and 125538 transitions. [2020-10-15 03:18:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 03:18:14,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:14,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:18:14,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 03:18:14,671 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:14,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2107006574, now seen corresponding path program 1 times [2020-10-15 03:18:14,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:14,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863218287] [2020-10-15 03:18:14,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:14,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:14,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:14,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:15,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:15,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 03:18:15,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:18:15,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 824 [2020-10-15 03:18:15,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:15,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:15,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:18:15,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:18:15,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 03:18:15,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:15,823 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-10-15 03:18:15,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:15,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:15,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:15,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:15,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:15,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:18:15,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:15,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:15,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:18:15,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:15,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:18:15,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:18:15,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863218287] [2020-10-15 03:18:15,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:18:15,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 03:18:15,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348922974] [2020-10-15 03:18:15,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:18:15,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:18:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:18:15,988 INFO L87 Difference]: Start difference. First operand 91543 states and 125538 transitions. Second operand 10 states. [2020-10-15 03:19:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:19:03,066 INFO L93 Difference]: Finished difference Result 331143 states and 450749 transitions. [2020-10-15 03:19:03,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 03:19:03,067 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-15 03:19:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:19:03,537 INFO L225 Difference]: With dead ends: 331143 [2020-10-15 03:19:03,538 INFO L226 Difference]: Without dead ends: 282666 [2020-10-15 03:19:03,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-10-15 03:19:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282666 states.