/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 13:51:15,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 13:51:15,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 13:51:15,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 13:51:15,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 13:51:15,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 13:51:15,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 13:51:15,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 13:51:15,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 13:51:15,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 13:51:15,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 13:51:15,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 13:51:15,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 13:51:15,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 13:51:15,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 13:51:15,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 13:51:15,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 13:51:15,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 13:51:15,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 13:51:15,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 13:51:15,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 13:51:15,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 13:51:15,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 13:51:15,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 13:51:15,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 13:51:15,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 13:51:15,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 13:51:15,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 13:51:15,977 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 13:51:15,978 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 13:51:15,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 13:51:15,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 13:51:15,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 13:51:15,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 13:51:15,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 13:51:15,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 13:51:15,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 13:51:15,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 13:51:15,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 13:51:15,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 13:51:15,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 13:51:15,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 13:51:16,029 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 13:51:16,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 13:51:16,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 13:51:16,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 13:51:16,032 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 13:51:16,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 13:51:16,033 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 13:51:16,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 13:51:16,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 13:51:16,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 13:51:16,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 13:51:16,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 13:51:16,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 13:51:16,035 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 13:51:16,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 13:51:16,036 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 13:51:16,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 13:51:16,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 13:51:16,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 13:51:16,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 13:51:16,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 13:51:16,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:51:16,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 13:51:16,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 13:51:16,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 13:51:16,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 13:51:16,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 13:51:16,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 13:51:16,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 13:51:16,038 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 13:51:16,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 13:51:16,364 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 13:51:16,369 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 13:51:16,371 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 13:51:16,373 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 13:51:16,374 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 13:51:16,442 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a70253f2/de5051789d4b488e89c4bcd7c663959d/FLAG8ad1f1110 [2020-10-13 13:51:16,983 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 13:51:16,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 13:51:16,999 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a70253f2/de5051789d4b488e89c4bcd7c663959d/FLAG8ad1f1110 [2020-10-13 13:51:17,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a70253f2/de5051789d4b488e89c4bcd7c663959d [2020-10-13 13:51:17,283 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 13:51:17,286 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 13:51:17,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 13:51:17,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 13:51:17,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 13:51:17,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:51:17" (1/1) ... [2020-10-13 13:51:17,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@658c4011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:17, skipping insertion in model container [2020-10-13 13:51:17,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:51:17" (1/1) ... [2020-10-13 13:51:17,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 13:51:17,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 13:51:17,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:51:17,776 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 13:51:17,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:51:17,882 INFO L208 MainTranslator]: Completed translation [2020-10-13 13:51:17,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:17 WrapperNode [2020-10-13 13:51:17,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 13:51:17,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 13:51:17,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 13:51:17,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 13:51:17,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:17" (1/1) ... [2020-10-13 13:51:17,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:17" (1/1) ... [2020-10-13 13:51:17,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:17" (1/1) ... [2020-10-13 13:51:17,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:17" (1/1) ... [2020-10-13 13:51:17,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:17" (1/1) ... [2020-10-13 13:51:17,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:17" (1/1) ... [2020-10-13 13:51:17,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:17" (1/1) ... [2020-10-13 13:51:17,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 13:51:17,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 13:51:17,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 13:51:17,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 13:51:17,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:51:18,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 13:51:18,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 13:51:18,003 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 13:51:18,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 13:51:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 13:51:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 13:51:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 13:51:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 13:51:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 13:51:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 13:51:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 13:51:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 13:51:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 13:51:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 13:51:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 13:51:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 13:51:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 13:51:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 13:51:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 13:51:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 13:51:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 13:51:18,711 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 13:51:18,712 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 13:51:18,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:51:18 BoogieIcfgContainer [2020-10-13 13:51:18,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 13:51:18,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 13:51:18,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 13:51:18,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 13:51:18,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:51:17" (1/3) ... [2020-10-13 13:51:18,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7844bcdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:51:18, skipping insertion in model container [2020-10-13 13:51:18,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:17" (2/3) ... [2020-10-13 13:51:18,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7844bcdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:51:18, skipping insertion in model container [2020-10-13 13:51:18,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:51:18" (3/3) ... [2020-10-13 13:51:18,726 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 13:51:18,737 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 13:51:18,745 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 13:51:18,759 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 13:51:18,786 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 13:51:18,786 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 13:51:18,786 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 13:51:18,786 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 13:51:18,787 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 13:51:18,787 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 13:51:18,787 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 13:51:18,787 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 13:51:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-13 13:51:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 13:51:18,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:18,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:18,821 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:18,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1611542725, now seen corresponding path program 1 times [2020-10-13 13:51:18,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:18,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488955633] [2020-10-13 13:51:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:19,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:19,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:19,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:20,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:21,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:21,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 13:51:21,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:51:21,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2343 [2020-10-13 13:51:21,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:21,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:51:21,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 13:51:21,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 13:51:21,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 13:51:21,905 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:51:21,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:21,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:21,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:21,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:21,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:21,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-13 13:51:21,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:21,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:21,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:21,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:21,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:51:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:21,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488955633] [2020-10-13 13:51:21,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:21,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:51:21,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134435728] [2020-10-13 13:51:21,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:51:21,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:22,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:51:22,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:51:22,015 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 6 states. [2020-10-13 13:51:22,325 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-13 13:51:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:23,292 INFO L93 Difference]: Finished difference Result 659 states and 1106 transitions. [2020-10-13 13:51:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:51:23,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-13 13:51:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:23,316 INFO L225 Difference]: With dead ends: 659 [2020-10-13 13:51:23,316 INFO L226 Difference]: Without dead ends: 556 [2020-10-13 13:51:23,321 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 [2020-10-13 13:51:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-13 13:51:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 222. [2020-10-13 13:51:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-13 13:51:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 353 transitions. [2020-10-13 13:51:23,421 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 353 transitions. Word has length 60 [2020-10-13 13:51:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:23,423 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 353 transitions. [2020-10-13 13:51:23,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:51:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 353 transitions. [2020-10-13 13:51:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 13:51:23,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:23,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:23,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 13:51:23,431 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:23,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:23,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1643393529, now seen corresponding path program 1 times [2020-10-13 13:51:23,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:23,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216479482] [2020-10-13 13:51:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:23,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:23,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:23,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:23,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:24,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:26,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:26,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 13:51:26,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:51:26,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2581 [2020-10-13 13:51:26,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:26,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:51:26,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 13:51:26,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 13:51:26,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:51:26,315 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:51:26,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:26,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:26,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:26,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:26,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:26,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:51:26,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:26,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:26,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216479482] [2020-10-13 13:51:26,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:26,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 13:51:26,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050506020] [2020-10-13 13:51:26,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:51:26,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:26,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:51:26,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:51:26,352 INFO L87 Difference]: Start difference. First operand 222 states and 353 transitions. Second operand 7 states. [2020-10-13 13:51:26,608 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-13 13:51:27,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:27,838 INFO L93 Difference]: Finished difference Result 1378 states and 2286 transitions. [2020-10-13 13:51:27,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 13:51:27,839 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-10-13 13:51:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:27,848 INFO L225 Difference]: With dead ends: 1378 [2020-10-13 13:51:27,849 INFO L226 Difference]: Without dead ends: 1214 [2020-10-13 13:51:27,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-13 13:51:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2020-10-13 13:51:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 645. [2020-10-13 13:51:27,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2020-10-13 13:51:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1062 transitions. [2020-10-13 13:51:27,944 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1062 transitions. Word has length 61 [2020-10-13 13:51:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:27,945 INFO L479 AbstractCegarLoop]: Abstraction has 645 states and 1062 transitions. [2020-10-13 13:51:27,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:51:27,945 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1062 transitions. [2020-10-13 13:51:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 13:51:27,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:27,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:27,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 13:51:27,954 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:27,955 INFO L82 PathProgramCache]: Analyzing trace with hash 537355724, now seen corresponding path program 1 times [2020-10-13 13:51:27,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:27,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799692533] [2020-10-13 13:51:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:28,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:28,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:28,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:28,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:28,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:30,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:30,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 13:51:30,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:51:30,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2091 [2020-10-13 13:51:30,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:30,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:51:30,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 13:51:30,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 13:51:30,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:51:30,334 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:51:30,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:30,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:30,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:30,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:30,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:30,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:51:30,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:30,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:30,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799692533] [2020-10-13 13:51:30,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:30,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:51:30,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924370740] [2020-10-13 13:51:30,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:51:30,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:30,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:51:30,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:51:30,374 INFO L87 Difference]: Start difference. First operand 645 states and 1062 transitions. Second operand 5 states. [2020-10-13 13:51:30,573 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:51:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:31,343 INFO L93 Difference]: Finished difference Result 2260 states and 3771 transitions. [2020-10-13 13:51:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:51:31,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-10-13 13:51:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:31,360 INFO L225 Difference]: With dead ends: 2260 [2020-10-13 13:51:31,360 INFO L226 Difference]: Without dead ends: 1725 [2020-10-13 13:51:31,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:51:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2020-10-13 13:51:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1181. [2020-10-13 13:51:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1181 states. [2020-10-13 13:51:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1958 transitions. [2020-10-13 13:51:31,476 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1958 transitions. Word has length 62 [2020-10-13 13:51:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:31,477 INFO L479 AbstractCegarLoop]: Abstraction has 1181 states and 1958 transitions. [2020-10-13 13:51:31,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:51:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1958 transitions. [2020-10-13 13:51:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 13:51:31,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:31,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:31,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 13:51:31,480 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:31,480 INFO L82 PathProgramCache]: Analyzing trace with hash -574336146, now seen corresponding path program 1 times [2020-10-13 13:51:31,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:31,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783874448] [2020-10-13 13:51:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:31,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:31,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:31,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:31,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:32,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:33,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:33,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 13:51:33,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:51:33,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2129 [2020-10-13 13:51:33,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:33,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:51:33,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 13:51:33,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 13:51:33,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:33,855 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:51:33,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:33,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:33,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:33,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:33,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:33,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 13:51:33,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:33,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:51:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:33,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783874448] [2020-10-13 13:51:33,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:33,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:51:33,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410097015] [2020-10-13 13:51:33,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:51:33,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:33,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:51:33,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:51:33,917 INFO L87 Difference]: Start difference. First operand 1181 states and 1958 transitions. Second operand 5 states. [2020-10-13 13:51:34,176 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:51:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:35,046 INFO L93 Difference]: Finished difference Result 4364 states and 7283 transitions. [2020-10-13 13:51:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:51:35,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-13 13:51:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:35,073 INFO L225 Difference]: With dead ends: 4364 [2020-10-13 13:51:35,074 INFO L226 Difference]: Without dead ends: 3303 [2020-10-13 13:51:35,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:51:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2020-10-13 13:51:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 2226. [2020-10-13 13:51:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2226 states. [2020-10-13 13:51:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3696 transitions. [2020-10-13 13:51:35,309 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3696 transitions. Word has length 63 [2020-10-13 13:51:35,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:35,309 INFO L479 AbstractCegarLoop]: Abstraction has 2226 states and 3696 transitions. [2020-10-13 13:51:35,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:51:35,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3696 transitions. [2020-10-13 13:51:35,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 13:51:35,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:35,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:35,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 13:51:35,313 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:35,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:35,313 INFO L82 PathProgramCache]: Analyzing trace with hash 224317013, now seen corresponding path program 1 times [2020-10-13 13:51:35,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:35,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112760593] [2020-10-13 13:51:35,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:35,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:35,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:35,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:35,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:35,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:35,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:38,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:38,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:40,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:40,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 13:51:40,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 13:51:40,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 13:51:40,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:40,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:51:40,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 13:51:40,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:51:40,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:51:40,603 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:51:40,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:40,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:40,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:40,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:40,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:40,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 13:51:40,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:40,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:40,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:40,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:40,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:40,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112760593] [2020-10-13 13:51:40,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:40,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:51:40,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355149478] [2020-10-13 13:51:40,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:51:40,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:40,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:51:40,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:51:40,652 INFO L87 Difference]: Start difference. First operand 2226 states and 3696 transitions. Second operand 5 states. [2020-10-13 13:51:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:41,757 INFO L93 Difference]: Finished difference Result 6199 states and 10323 transitions. [2020-10-13 13:51:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:51:41,758 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-13 13:51:41,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:41,782 INFO L225 Difference]: With dead ends: 6199 [2020-10-13 13:51:41,782 INFO L226 Difference]: Without dead ends: 4082 [2020-10-13 13:51:41,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:51:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2020-10-13 13:51:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 4024. [2020-10-13 13:51:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4024 states. [2020-10-13 13:51:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 6648 transitions. [2020-10-13 13:51:42,104 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 6648 transitions. Word has length 65 [2020-10-13 13:51:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:42,105 INFO L479 AbstractCegarLoop]: Abstraction has 4024 states and 6648 transitions. [2020-10-13 13:51:42,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:51:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 6648 transitions. [2020-10-13 13:51:42,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 13:51:42,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:42,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:42,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 13:51:42,108 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:42,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:42,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1472759263, now seen corresponding path program 1 times [2020-10-13 13:51:42,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:42,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260171945] [2020-10-13 13:51:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:42,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:42,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:42,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:42,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:42,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:43,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:43,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:47,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:47,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 13:51:47,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:51:47,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 13:51:47,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:51:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 13:51:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 13:51:47,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:51:47,323 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:51:47,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:47,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:47,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:47,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:47,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:47,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:51:47,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:47,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:47,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:47,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:47,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:47,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260171945] [2020-10-13 13:51:47,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:47,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:51:47,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843396559] [2020-10-13 13:51:47,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:51:47,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:47,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:51:47,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:51:47,364 INFO L87 Difference]: Start difference. First operand 4024 states and 6648 transitions. Second operand 4 states. [2020-10-13 13:51:47,619 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:51:49,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:49,244 INFO L93 Difference]: Finished difference Result 10983 states and 18223 transitions. [2020-10-13 13:51:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:51:49,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 13:51:49,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:49,285 INFO L225 Difference]: With dead ends: 10983 [2020-10-13 13:51:49,285 INFO L226 Difference]: Without dead ends: 7051 [2020-10-13 13:51:49,295 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 [2020-10-13 13:51:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2020-10-13 13:51:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 7049. [2020-10-13 13:51:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7049 states. [2020-10-13 13:51:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7049 states to 7049 states and 11649 transitions. [2020-10-13 13:51:49,771 INFO L78 Accepts]: Start accepts. Automaton has 7049 states and 11649 transitions. Word has length 65 [2020-10-13 13:51:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:49,771 INFO L479 AbstractCegarLoop]: Abstraction has 7049 states and 11649 transitions. [2020-10-13 13:51:49,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:51:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 7049 states and 11649 transitions. [2020-10-13 13:51:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 13:51:49,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:49,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:49,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 13:51:49,773 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:49,774 INFO L82 PathProgramCache]: Analyzing trace with hash 624109630, now seen corresponding path program 1 times [2020-10-13 13:51:49,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:49,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507015401] [2020-10-13 13:51:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:49,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:49,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:49,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:50,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:50,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:50,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:50,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 13:51:50,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:51:50,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1066 [2020-10-13 13:51:50,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:51:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 13:51:50,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:51:50,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:51,157 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:51:51,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:51,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:51,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:51,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:51,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:51,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:51:51,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:51,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:51,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:51,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:51,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:51,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507015401] [2020-10-13 13:51:51,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:51,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:51:51,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493217059] [2020-10-13 13:51:51,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:51:51,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:51,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:51:51,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:51:51,193 INFO L87 Difference]: Start difference. First operand 7049 states and 11649 transitions. Second operand 4 states. [2020-10-13 13:51:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:52,701 INFO L93 Difference]: Finished difference Result 18697 states and 30690 transitions. [2020-10-13 13:51:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:51:52,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 13:51:52,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:52,770 INFO L225 Difference]: With dead ends: 18697 [2020-10-13 13:51:52,770 INFO L226 Difference]: Without dead ends: 11749 [2020-10-13 13:51:52,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:51:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11749 states. [2020-10-13 13:51:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11749 to 11522. [2020-10-13 13:51:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11522 states. [2020-10-13 13:51:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11522 states to 11522 states and 18547 transitions. [2020-10-13 13:51:53,699 INFO L78 Accepts]: Start accepts. Automaton has 11522 states and 18547 transitions. Word has length 65 [2020-10-13 13:51:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:53,699 INFO L479 AbstractCegarLoop]: Abstraction has 11522 states and 18547 transitions. [2020-10-13 13:51:53,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:51:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 11522 states and 18547 transitions. [2020-10-13 13:51:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 13:51:53,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:53,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:53,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 13:51:53,702 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:53,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:53,703 INFO L82 PathProgramCache]: Analyzing trace with hash -280562700, now seen corresponding path program 1 times [2020-10-13 13:51:53,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:53,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86538521] [2020-10-13 13:51:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:53,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:53,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:53,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:54,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:54,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:56,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:58,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:58,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 13:51:58,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:51:58,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 13:51:58,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:58,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:51:58,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 13:51:58,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 13:51:58,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:58,918 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:51:58,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:58,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:58,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:58,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:58,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:58,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:51:58,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:58,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:58,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:58,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:58,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:58,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86538521] [2020-10-13 13:51:58,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:58,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:51:58,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507803653] [2020-10-13 13:51:58,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:51:58,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:58,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:51:58,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:51:58,951 INFO L87 Difference]: Start difference. First operand 11522 states and 18547 transitions. Second operand 4 states. [2020-10-13 13:51:59,186 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:52:00,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:00,755 INFO L93 Difference]: Finished difference Result 29726 states and 47653 transitions. [2020-10-13 13:52:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:52:00,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 13:52:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:00,798 INFO L225 Difference]: With dead ends: 29726 [2020-10-13 13:52:00,798 INFO L226 Difference]: Without dead ends: 18312 [2020-10-13 13:52:00,822 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 [2020-10-13 13:52:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18312 states. [2020-10-13 13:52:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18312 to 18260. [2020-10-13 13:52:01,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18260 states. [2020-10-13 13:52:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18260 states to 18260 states and 28957 transitions. [2020-10-13 13:52:01,935 INFO L78 Accepts]: Start accepts. Automaton has 18260 states and 28957 transitions. Word has length 65 [2020-10-13 13:52:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:01,936 INFO L479 AbstractCegarLoop]: Abstraction has 18260 states and 28957 transitions. [2020-10-13 13:52:01,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:52:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 18260 states and 28957 transitions. [2020-10-13 13:52:01,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 13:52:01,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:01,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:01,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 13:52:01,938 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:01,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:01,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1887526218, now seen corresponding path program 1 times [2020-10-13 13:52:01,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:01,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999588562] [2020-10-13 13:52:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:01,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:01,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:02,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:02,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:02,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:03,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:03,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:05,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:05,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:06,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:06,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 13:52:06,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 13:52:06,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:52:06,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:06,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:52:06,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 13:52:06,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:52:06,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:07,164 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:52:07,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:07,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:07,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:07,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:07,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:07,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:52:07,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:07,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:07,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999588562] [2020-10-13 13:52:07,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:07,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:52:07,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394087224] [2020-10-13 13:52:07,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:52:07,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:07,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:52:07,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:52:07,189 INFO L87 Difference]: Start difference. First operand 18260 states and 28957 transitions. Second operand 5 states. [2020-10-13 13:52:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:09,197 INFO L93 Difference]: Finished difference Result 51592 states and 81655 transitions. [2020-10-13 13:52:09,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:52:09,198 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-13 13:52:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:09,275 INFO L225 Difference]: With dead ends: 51592 [2020-10-13 13:52:09,275 INFO L226 Difference]: Without dead ends: 33390 [2020-10-13 13:52:09,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:52:09,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33390 states. [2020-10-13 13:52:10,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33390 to 19732. [2020-10-13 13:52:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19732 states. [2020-10-13 13:52:10,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19732 states to 19732 states and 31325 transitions. [2020-10-13 13:52:10,435 INFO L78 Accepts]: Start accepts. Automaton has 19732 states and 31325 transitions. Word has length 65 [2020-10-13 13:52:10,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:10,436 INFO L479 AbstractCegarLoop]: Abstraction has 19732 states and 31325 transitions. [2020-10-13 13:52:10,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:52:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 19732 states and 31325 transitions. [2020-10-13 13:52:10,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 13:52:10,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:10,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:10,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 13:52:10,437 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:10,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2109780801, now seen corresponding path program 1 times [2020-10-13 13:52:10,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:10,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304363268] [2020-10-13 13:52:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:10,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:12,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:12,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:15,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:15,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 13:52:15,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 13:52:15,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 13:52:15,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:15,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:52:15,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 13:52:15,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:52:15,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:15,645 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:52:15,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:15,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:15,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:15,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:15,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:15,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:52:15,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:15,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:15,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:15,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:15,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:15,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304363268] [2020-10-13 13:52:15,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:15,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:52:15,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498825796] [2020-10-13 13:52:15,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:52:15,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:15,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:52:15,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:52:15,672 INFO L87 Difference]: Start difference. First operand 19732 states and 31325 transitions. Second operand 4 states. [2020-10-13 13:52:15,858 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:52:18,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:18,093 INFO L93 Difference]: Finished difference Result 52456 states and 83263 transitions. [2020-10-13 13:52:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:52:18,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 13:52:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:18,155 INFO L225 Difference]: With dead ends: 52456 [2020-10-13 13:52:18,156 INFO L226 Difference]: Without dead ends: 32782 [2020-10-13 13:52:18,194 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 [2020-10-13 13:52:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32782 states. [2020-10-13 13:52:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32782 to 32780. [2020-10-13 13:52:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32780 states. [2020-10-13 13:52:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32780 states to 32780 states and 51565 transitions. [2020-10-13 13:52:20,183 INFO L78 Accepts]: Start accepts. Automaton has 32780 states and 51565 transitions. Word has length 65 [2020-10-13 13:52:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:20,183 INFO L479 AbstractCegarLoop]: Abstraction has 32780 states and 51565 transitions. [2020-10-13 13:52:20,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:52:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 32780 states and 51565 transitions. [2020-10-13 13:52:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 13:52:20,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:20,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:20,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 13:52:20,185 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:20,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:20,185 INFO L82 PathProgramCache]: Analyzing trace with hash 926195294, now seen corresponding path program 1 times [2020-10-13 13:52:20,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:20,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225326670] [2020-10-13 13:52:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:20,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:20,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:20,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:20,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:20,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:20,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:20,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 13:52:20,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:52:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-13 13:52:20,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:52:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 13:52:20,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 13:52:20,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:20,780 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:52:20,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:20,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:20,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:20,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:20,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:20,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:52:20,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:20,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:20,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:20,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:20,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225326670] [2020-10-13 13:52:20,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:20,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:52:20,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050536506] [2020-10-13 13:52:20,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:52:20,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:20,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:52:20,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:52:20,813 INFO L87 Difference]: Start difference. First operand 32780 states and 51565 transitions. Second operand 4 states. [2020-10-13 13:52:21,019 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:52:23,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:23,360 INFO L93 Difference]: Finished difference Result 70275 states and 110744 transitions. [2020-10-13 13:52:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:52:23,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 13:52:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:23,418 INFO L225 Difference]: With dead ends: 70275 [2020-10-13 13:52:23,418 INFO L226 Difference]: Without dead ends: 37553 [2020-10-13 13:52:23,469 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 [2020-10-13 13:52:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37553 states. [2020-10-13 13:52:26,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37553 to 37447. [2020-10-13 13:52:26,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37447 states. [2020-10-13 13:52:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37447 states to 37447 states and 58670 transitions. [2020-10-13 13:52:26,687 INFO L78 Accepts]: Start accepts. Automaton has 37447 states and 58670 transitions. Word has length 66 [2020-10-13 13:52:26,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:26,688 INFO L479 AbstractCegarLoop]: Abstraction has 37447 states and 58670 transitions. [2020-10-13 13:52:26,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:52:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 37447 states and 58670 transitions. [2020-10-13 13:52:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 13:52:26,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:26,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:26,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 13:52:26,689 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:26,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1203796463, now seen corresponding path program 1 times [2020-10-13 13:52:26,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:26,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550128923] [2020-10-13 13:52:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:26,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:26,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:26,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:26,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:27,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:28,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:28,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 13:52:28,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:52:28,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1546 [2020-10-13 13:52:28,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:28,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:52:28,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 13:52:28,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 13:52:28,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:28,424 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:52:28,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:28,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:28,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:28,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:28,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:28,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:52:28,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:28,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:28,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:28,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550128923] [2020-10-13 13:52:28,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:28,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:52:28,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233917414] [2020-10-13 13:52:28,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:52:28,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:28,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:52:28,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:52:28,447 INFO L87 Difference]: Start difference. First operand 37447 states and 58670 transitions. Second operand 4 states. [2020-10-13 13:52:28,630 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:52:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:31,014 INFO L93 Difference]: Finished difference Result 80200 states and 125681 transitions. [2020-10-13 13:52:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:52:31,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-13 13:52:31,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:31,101 INFO L225 Difference]: With dead ends: 80200 [2020-10-13 13:52:31,101 INFO L226 Difference]: Without dead ends: 42812 [2020-10-13 13:52:31,161 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 [2020-10-13 13:52:31,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42812 states. [2020-10-13 13:52:33,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42812 to 42688. [2020-10-13 13:52:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42688 states. [2020-10-13 13:52:33,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42688 states to 42688 states and 66721 transitions. [2020-10-13 13:52:33,456 INFO L78 Accepts]: Start accepts. Automaton has 42688 states and 66721 transitions. Word has length 67 [2020-10-13 13:52:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:33,456 INFO L479 AbstractCegarLoop]: Abstraction has 42688 states and 66721 transitions. [2020-10-13 13:52:33,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:52:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 42688 states and 66721 transitions. [2020-10-13 13:52:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 13:52:33,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:33,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:33,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 13:52:33,457 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1612815006, now seen corresponding path program 1 times [2020-10-13 13:52:33,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:33,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077058493] [2020-10-13 13:52:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:33,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:33,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:33,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:33,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:33,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:34,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:37,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:37,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 13:52:37,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:52:37,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4244 [2020-10-13 13:52:37,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:37,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:52:37,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 13:52:37,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 13:52:37,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:37,946 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:52:37,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:37,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:37,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:37,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:37,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:37,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:52:37,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:37,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:37,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077058493] [2020-10-13 13:52:37,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:37,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:52:37,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541690827] [2020-10-13 13:52:37,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:52:37,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:37,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:52:37,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:52:37,978 INFO L87 Difference]: Start difference. First operand 42688 states and 66721 transitions. Second operand 6 states. [2020-10-13 13:52:38,216 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-13 13:52:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:44,268 INFO L93 Difference]: Finished difference Result 126280 states and 197707 transitions. [2020-10-13 13:52:44,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:52:44,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-13 13:52:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:44,378 INFO L225 Difference]: With dead ends: 126280 [2020-10-13 13:52:44,378 INFO L226 Difference]: Without dead ends: 83664 [2020-10-13 13:52:44,427 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 [2020-10-13 13:52:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83664 states. [2020-10-13 13:52:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83664 to 42688. [2020-10-13 13:52:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42688 states. [2020-10-13 13:52:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42688 states to 42688 states and 66515 transitions. [2020-10-13 13:52:46,813 INFO L78 Accepts]: Start accepts. Automaton has 42688 states and 66515 transitions. Word has length 69 [2020-10-13 13:52:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:46,813 INFO L479 AbstractCegarLoop]: Abstraction has 42688 states and 66515 transitions. [2020-10-13 13:52:46,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:52:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 42688 states and 66515 transitions. [2020-10-13 13:52:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 13:52:46,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:46,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:46,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 13:52:46,815 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:46,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1818175101, now seen corresponding path program 1 times [2020-10-13 13:52:46,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:46,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305334677] [2020-10-13 13:52:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:46,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:46,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:46,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:47,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:47,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:48,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:51,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:51,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 13:52:51,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:52:51,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4441 [2020-10-13 13:52:51,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:51,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:52:51,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 13:52:51,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 13:52:51,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:51,488 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:52:51,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:51,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:51,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:51,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:51,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:51,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:52:51,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:51,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:51,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:51,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:51,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:51,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305334677] [2020-10-13 13:52:51,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:51,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:52:51,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685047969] [2020-10-13 13:52:51,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:52:51,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:51,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:52:51,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:52:51,512 INFO L87 Difference]: Start difference. First operand 42688 states and 66515 transitions. Second operand 6 states. [2020-10-13 13:52:51,746 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-13 13:53:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:02,078 INFO L93 Difference]: Finished difference Result 199688 states and 312119 transitions. [2020-10-13 13:53:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:53:02,079 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-13 13:53:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:02,305 INFO L225 Difference]: With dead ends: 199688 [2020-10-13 13:53:02,306 INFO L226 Difference]: Without dead ends: 157072 [2020-10-13 13:53:02,353 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 [2020-10-13 13:53:02,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157072 states. [2020-10-13 13:53:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157072 to 79808. [2020-10-13 13:53:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79808 states. [2020-10-13 13:53:08,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79808 states to 79808 states and 123909 transitions. [2020-10-13 13:53:08,009 INFO L78 Accepts]: Start accepts. Automaton has 79808 states and 123909 transitions. Word has length 72 [2020-10-13 13:53:08,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:08,010 INFO L479 AbstractCegarLoop]: Abstraction has 79808 states and 123909 transitions. [2020-10-13 13:53:08,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:53:08,010 INFO L276 IsEmpty]: Start isEmpty. Operand 79808 states and 123909 transitions. [2020-10-13 13:53:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 13:53:08,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:08,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:08,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 13:53:08,011 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:08,011 INFO L82 PathProgramCache]: Analyzing trace with hash 526943995, now seen corresponding path program 1 times [2020-10-13 13:53:08,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:08,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651753577] [2020-10-13 13:53:08,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:08,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:08,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:08,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:08,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:08,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:09,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:12,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:12,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 13:53:12,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:53:12,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4250 [2020-10-13 13:53:12,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:53:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-13 13:53:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:53:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:12,478 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:53:12,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:12,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:12,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:12,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:12,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:12,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:53:12,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:12,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:53:12,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:53:12,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:12,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651753577] [2020-10-13 13:53:12,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:12,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:53:12,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176228838] [2020-10-13 13:53:12,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:53:12,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:12,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:53:12,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:53:12,497 INFO L87 Difference]: Start difference. First operand 79808 states and 123909 transitions. Second operand 5 states. [2020-10-13 13:53:20,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:20,408 INFO L93 Difference]: Finished difference Result 113271 states and 174039 transitions. [2020-10-13 13:53:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:53:20,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-13 13:53:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:20,572 INFO L225 Difference]: With dead ends: 113271 [2020-10-13 13:53:20,572 INFO L226 Difference]: Without dead ends: 113269 [2020-10-13 13:53:20,594 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 [2020-10-13 13:53:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113269 states. [2020-10-13 13:53:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113269 to 80552. [2020-10-13 13:53:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80552 states. [2020-10-13 13:53:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80552 states to 80552 states and 124603 transitions. [2020-10-13 13:53:26,519 INFO L78 Accepts]: Start accepts. Automaton has 80552 states and 124603 transitions. Word has length 73 [2020-10-13 13:53:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:26,519 INFO L479 AbstractCegarLoop]: Abstraction has 80552 states and 124603 transitions. [2020-10-13 13:53:26,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:53:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 80552 states and 124603 transitions. [2020-10-13 13:53:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 13:53:26,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:26,521 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:26,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 13:53:26,522 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:26,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:26,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1721713085, now seen corresponding path program 1 times [2020-10-13 13:53:26,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:26,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464716973] [2020-10-13 13:53:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:26,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:26,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:26,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:26,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:26,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:26,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:27,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:27,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:28,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:28,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:28,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:31,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:31,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 13:53:31,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:53:31,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 13:53:31,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:31,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:53:31,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 13:53:31,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 13:53:31,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:31,733 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:53:31,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:31,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:31,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:31,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:31,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:31,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:53:31,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:31,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:53:31,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:31,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:53:31,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:31,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464716973] [2020-10-13 13:53:31,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:31,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:53:31,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749602932] [2020-10-13 13:53:31,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:53:31,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:53:31,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:53:31,760 INFO L87 Difference]: Start difference. First operand 80552 states and 124603 transitions. Second operand 4 states. [2020-10-13 13:53:38,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:38,344 INFO L93 Difference]: Finished difference Result 151148 states and 234267 transitions. [2020-10-13 13:53:38,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:53:38,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-13 13:53:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:38,459 INFO L225 Difference]: With dead ends: 151148 [2020-10-13 13:53:38,459 INFO L226 Difference]: Without dead ends: 70668 [2020-10-13 13:53:38,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:53:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70668 states. [2020-10-13 13:53:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70668 to 69302. [2020-10-13 13:53:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69302 states. [2020-10-13 13:53:43,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69302 states to 69302 states and 107010 transitions. [2020-10-13 13:53:43,760 INFO L78 Accepts]: Start accepts. Automaton has 69302 states and 107010 transitions. Word has length 93 [2020-10-13 13:53:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:43,760 INFO L479 AbstractCegarLoop]: Abstraction has 69302 states and 107010 transitions. [2020-10-13 13:53:43,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:53:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 69302 states and 107010 transitions. [2020-10-13 13:53:43,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 13:53:43,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:43,763 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:43,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 13:53:43,764 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:43,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:43,764 INFO L82 PathProgramCache]: Analyzing trace with hash -631451357, now seen corresponding path program 1 times [2020-10-13 13:53:43,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:43,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637806482] [2020-10-13 13:53:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:43,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:43,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:43,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:43,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:43,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:43,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:46,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:46,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:46,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:46,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:46,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:46,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:48,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:48,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 13:53:48,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 13:53:48,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:53:48,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:48,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:53:48,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 13:53:48,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 13:53:48,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:48,975 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:53:48,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:48,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:48,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:48,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:48,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:48,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:53:48,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:48,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:53:48,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:48,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:53:48,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:49,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637806482] [2020-10-13 13:53:49,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:49,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:53:49,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470251439] [2020-10-13 13:53:49,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:53:49,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:49,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:53:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:53:49,003 INFO L87 Difference]: Start difference. First operand 69302 states and 107010 transitions. Second operand 4 states. [2020-10-13 13:53:52,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:52,938 INFO L93 Difference]: Finished difference Result 99554 states and 153845 transitions. [2020-10-13 13:53:52,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:53:52,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-13 13:53:52,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:52,984 INFO L225 Difference]: With dead ends: 99554 [2020-10-13 13:53:52,984 INFO L226 Difference]: Without dead ends: 30364 [2020-10-13 13:53:53,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:53:53,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30364 states. [2020-10-13 13:53:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30364 to 24198. [2020-10-13 13:53:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24198 states. [2020-10-13 13:53:55,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24198 states to 24198 states and 37132 transitions. [2020-10-13 13:53:55,076 INFO L78 Accepts]: Start accepts. Automaton has 24198 states and 37132 transitions. Word has length 93 [2020-10-13 13:53:55,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:55,077 INFO L479 AbstractCegarLoop]: Abstraction has 24198 states and 37132 transitions. [2020-10-13 13:53:55,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:53:55,077 INFO L276 IsEmpty]: Start isEmpty. Operand 24198 states and 37132 transitions. [2020-10-13 13:53:55,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 13:53:55,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:55,079 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:55,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 13:53:55,079 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:55,079 INFO L82 PathProgramCache]: Analyzing trace with hash 875537890, now seen corresponding path program 1 times [2020-10-13 13:53:55,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:55,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639333294] [2020-10-13 13:53:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:55,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:55,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:55,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:55,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:55,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:55,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:56,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:56,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:56,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:56,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:00,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:00,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 13:54:00,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:54:00,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 13:54:00,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:00,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:54:00,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 13:54:00,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 13:54:00,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:00,265 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:54:00,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:00,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:00,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:00,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:00,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:00,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:54:00,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:00,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 13:54:00,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639333294] [2020-10-13 13:54:00,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:00,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:54:00,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158453918] [2020-10-13 13:54:00,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:54:00,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:00,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:54:00,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:54:00,295 INFO L87 Difference]: Start difference. First operand 24198 states and 37132 transitions. Second operand 4 states. [2020-10-13 13:54:00,488 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:54:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:03,349 INFO L93 Difference]: Finished difference Result 54900 states and 84176 transitions. [2020-10-13 13:54:03,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:54:03,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-13 13:54:03,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:03,390 INFO L225 Difference]: With dead ends: 54900 [2020-10-13 13:54:03,391 INFO L226 Difference]: Without dead ends: 30798 [2020-10-13 13:54:03,411 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 [2020-10-13 13:54:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30798 states. [2020-10-13 13:54:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30798 to 30640. [2020-10-13 13:54:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30640 states. [2020-10-13 13:54:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30640 states to 30640 states and 46707 transitions. [2020-10-13 13:54:05,813 INFO L78 Accepts]: Start accepts. Automaton has 30640 states and 46707 transitions. Word has length 95 [2020-10-13 13:54:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:05,813 INFO L479 AbstractCegarLoop]: Abstraction has 30640 states and 46707 transitions. [2020-10-13 13:54:05,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:54:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30640 states and 46707 transitions. [2020-10-13 13:54:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 13:54:05,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:05,816 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:05,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 13:54:05,816 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:05,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1577103426, now seen corresponding path program 1 times [2020-10-13 13:54:05,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:05,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029605040] [2020-10-13 13:54:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:05,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:05,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:05,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:05,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:05,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:06,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:06,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:07,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:07,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:10,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:10,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:10,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 13:54:10,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:54:10,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:54:10,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:10,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:54:10,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:54:10,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 13:54:10,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:11,049 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:54:11,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:11,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:11,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:11,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:11,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:11,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:54:11,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:11,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:11,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:11,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:11,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 13:54:11,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029605040] [2020-10-13 13:54:11,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:11,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:54:11,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154721478] [2020-10-13 13:54:11,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:54:11,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:11,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:54:11,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:54:11,077 INFO L87 Difference]: Start difference. First operand 30640 states and 46707 transitions. Second operand 5 states. [2020-10-13 13:54:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:16,873 INFO L93 Difference]: Finished difference Result 90333 states and 137482 transitions. [2020-10-13 13:54:16,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:54:16,873 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-13 13:54:16,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:16,954 INFO L225 Difference]: With dead ends: 90333 [2020-10-13 13:54:16,954 INFO L226 Difference]: Without dead ends: 59706 [2020-10-13 13:54:16,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:54:17,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59706 states. [2020-10-13 13:54:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59706 to 59704. [2020-10-13 13:54:21,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59704 states. [2020-10-13 13:54:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59704 states to 59704 states and 90010 transitions. [2020-10-13 13:54:21,885 INFO L78 Accepts]: Start accepts. Automaton has 59704 states and 90010 transitions. Word has length 99 [2020-10-13 13:54:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:21,885 INFO L479 AbstractCegarLoop]: Abstraction has 59704 states and 90010 transitions. [2020-10-13 13:54:21,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:54:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 59704 states and 90010 transitions. [2020-10-13 13:54:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 13:54:21,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:21,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:21,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 13:54:21,895 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:21,896 INFO L82 PathProgramCache]: Analyzing trace with hash 214351160, now seen corresponding path program 1 times [2020-10-13 13:54:21,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:21,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746183583] [2020-10-13 13:54:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:21,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:21,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:21,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:21,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:22,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:22,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:23,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:23,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:23,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:23,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:23,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:26,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:26,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 13:54:26,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:54:26,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 13:54:26,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:26,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:54:26,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:54:26,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:54:26,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:27,101 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:54:27,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:27,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:27,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:27,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:27,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:27,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:54:27,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:27,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 13:54:27,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746183583] [2020-10-13 13:54:27,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:27,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:54:27,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272363710] [2020-10-13 13:54:27,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:54:27,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:27,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:54:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:54:27,125 INFO L87 Difference]: Start difference. First operand 59704 states and 90010 transitions. Second operand 4 states. [2020-10-13 13:54:38,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:38,533 INFO L93 Difference]: Finished difference Result 179066 states and 269960 transitions. [2020-10-13 13:54:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:54:38,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-13 13:54:38,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:38,712 INFO L225 Difference]: With dead ends: 179066 [2020-10-13 13:54:38,713 INFO L226 Difference]: Without dead ends: 119394 [2020-10-13 13:54:38,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:54:38,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119394 states. [2020-10-13 13:54:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119394 to 59706. [2020-10-13 13:54:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59706 states. [2020-10-13 13:54:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59706 states to 59706 states and 90012 transitions. [2020-10-13 13:54:44,550 INFO L78 Accepts]: Start accepts. Automaton has 59706 states and 90012 transitions. Word has length 100 [2020-10-13 13:54:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:44,550 INFO L479 AbstractCegarLoop]: Abstraction has 59706 states and 90012 transitions. [2020-10-13 13:54:44,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:54:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 59706 states and 90012 transitions. [2020-10-13 13:54:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 13:54:44,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:44,553 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:44,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 13:54:44,554 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:44,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1805540001, now seen corresponding path program 1 times [2020-10-13 13:54:44,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:44,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629521479] [2020-10-13 13:54:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:44,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:44,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:44,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:44,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:44,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:44,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:44,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:44,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:45,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:48,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:48,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:48,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:49,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:49,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 13:54:49,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 13:54:49,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 13:54:49,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:49,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:54:49,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 13:54:49,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 13:54:49,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:49,797 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:54:49,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:49,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:49,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:49,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:49,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:49,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:54:49,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:49,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:49,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:49,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:49,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 13:54:49,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629521479] [2020-10-13 13:54:49,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:49,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:54:49,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814329890] [2020-10-13 13:54:49,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:54:49,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:49,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:54:49,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:54:49,834 INFO L87 Difference]: Start difference. First operand 59706 states and 90012 transitions. Second operand 5 states. [2020-10-13 13:54:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:55,571 INFO L93 Difference]: Finished difference Result 119394 states and 179999 transitions. [2020-10-13 13:54:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:54:55,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2020-10-13 13:54:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:55,651 INFO L225 Difference]: With dead ends: 119394 [2020-10-13 13:54:55,651 INFO L226 Difference]: Without dead ends: 59706 [2020-10-13 13:54:55,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:54:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59706 states.