/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:10:06,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:10:06,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:10:06,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:10:06,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:10:06,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:10:06,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:10:06,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:10:06,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:10:06,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:10:06,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:10:06,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:10:06,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:10:06,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:10:06,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:10:06,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:10:06,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:10:06,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:10:06,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:10:06,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:10:06,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:10:06,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:10:06,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:10:06,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:10:06,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:10:06,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:10:06,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:10:06,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:10:06,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:10:06,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:10:06,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:10:06,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:10:06,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:10:06,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:10:06,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:10:06,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:10:06,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:10:06,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:10:06,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:10:06,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:10:06,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:10:06,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:10:06,527 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:10:06,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:10:06,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:10:06,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:10:06,529 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:10:06,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:10:06,530 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:10:06,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:10:06,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:10:06,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:10:06,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:10:06,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:10:06,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:10:06,531 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:10:06,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:10:06,531 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:10:06,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:10:06,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:10:06,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:10:06,532 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:10:06,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:10:06,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:10:06,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:10:06,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:10:06,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:10:06,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:10:06,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:10:06,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:10:06,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:10:06,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:10:06,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:10:06,850 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:10:06,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:10:06,856 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:10:06,856 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:10:06,857 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:10:06,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/187bc2aea/9234ecbbcd4e48808e24adfeff4d0747/FLAG8bfc69839 [2020-10-13 14:10:07,419 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:10:07,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:10:07,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/187bc2aea/9234ecbbcd4e48808e24adfeff4d0747/FLAG8bfc69839 [2020-10-13 14:10:07,768 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/187bc2aea/9234ecbbcd4e48808e24adfeff4d0747 [2020-10-13 14:10:07,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:10:07,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:10:07,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:10:07,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:10:07,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:10:07,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:10:07" (1/1) ... [2020-10-13 14:10:07,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2210ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:10:07, skipping insertion in model container [2020-10-13 14:10:07,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:10:07" (1/1) ... [2020-10-13 14:10:07,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:10:07,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:10:08,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:10:08,073 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:10:08,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:10:08,265 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:10:08,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:10:08 WrapperNode [2020-10-13 14:10:08,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:10:08,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:10:08,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:10:08,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:10:08,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:10:08" (1/1) ... [2020-10-13 14:10:08,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:10:08" (1/1) ... [2020-10-13 14:10:08,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:10:08" (1/1) ... [2020-10-13 14:10:08,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:10:08" (1/1) ... [2020-10-13 14:10:08,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:10:08" (1/1) ... [2020-10-13 14:10:08,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:10:08" (1/1) ... [2020-10-13 14:10:08,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:10:08" (1/1) ... [2020-10-13 14:10:08,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:10:08,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:10:08,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:10:08,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:10:08,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:10:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:10:08,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:10:08,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:10:08,415 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:10:08,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:10:08,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:10:08,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:10:08,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:10:08,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:10:08,416 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:10:08,416 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:10:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:10:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:10:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:10:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:10:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:10:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:10:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:10:08,418 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:10:08,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:10:08,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:10:08,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:10:08,933 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:10:08,934 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:10:08,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:10:08 BoogieIcfgContainer [2020-10-13 14:10:08,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:10:08,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:10:08,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:10:08,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:10:08,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:10:07" (1/3) ... [2020-10-13 14:10:08,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3313eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:10:08, skipping insertion in model container [2020-10-13 14:10:08,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:10:08" (2/3) ... [2020-10-13 14:10:08,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3313eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:10:08, skipping insertion in model container [2020-10-13 14:10:08,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:10:08" (3/3) ... [2020-10-13 14:10:08,948 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:10:08,957 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:10:08,965 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:10:08,980 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:10:09,003 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:10:09,003 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:10:09,003 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:10:09,003 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:10:09,004 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:10:09,004 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:10:09,004 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:10:09,004 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:10:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2020-10-13 14:10:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 14:10:09,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:09,034 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] [2020-10-13 14:10:09,035 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:09,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:09,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1464413452, now seen corresponding path program 1 times [2020-10-13 14:10:09,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:09,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229552399] [2020-10-13 14:10:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:09,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:09,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:09,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:10,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:11,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:11,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 14:10:11,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:10:11,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2491 [2020-10-13 14:10:11,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:11,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:10:11,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:10:11,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 14:10:11,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 14:10:12,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:12,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:12,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:12,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:12,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:12,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:10:12,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:12,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:12,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:12,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:12,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:10:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:12,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229552399] [2020-10-13 14:10:12,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:12,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:10:12,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235590135] [2020-10-13 14:10:12,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:10:12,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:12,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:10:12,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:10:12,077 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 4 states. [2020-10-13 14:10:12,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:12,659 INFO L93 Difference]: Finished difference Result 153 states and 237 transitions. [2020-10-13 14:10:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:10:12,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-13 14:10:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:12,677 INFO L225 Difference]: With dead ends: 153 [2020-10-13 14:10:12,677 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 14:10:12,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:10:12,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 14:10:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-13 14:10:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 14:10:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 140 transitions. [2020-10-13 14:10:12,745 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 140 transitions. Word has length 41 [2020-10-13 14:10:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:12,745 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 140 transitions. [2020-10-13 14:10:12,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:10:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 140 transitions. [2020-10-13 14:10:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 14:10:12,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:12,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:12,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:10:12,748 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash 107600900, now seen corresponding path program 1 times [2020-10-13 14:10:12,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:12,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498945245] [2020-10-13 14:10:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:12,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:12,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:13,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:13,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:13,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 14:10:13,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:10:13,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-13 14:10:13,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:13,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:10:13,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:10:13,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 14:10:13,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:10:13,841 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-13 14:10:13,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:13,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:13,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:13,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:13,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:13,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:10:13,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:13,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:13,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:13,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:13,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:10:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:13,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498945245] [2020-10-13 14:10:13,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:13,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:10:13,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117360274] [2020-10-13 14:10:13,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:10:13,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:13,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:10:13,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:10:13,874 INFO L87 Difference]: Start difference. First operand 97 states and 140 transitions. Second operand 4 states. [2020-10-13 14:10:14,019 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-13 14:10:14,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:14,286 INFO L93 Difference]: Finished difference Result 229 states and 348 transitions. [2020-10-13 14:10:14,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:10:14,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-13 14:10:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:14,289 INFO L225 Difference]: With dead ends: 229 [2020-10-13 14:10:14,289 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 14:10:14,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:10:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 14:10:14,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-10-13 14:10:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 14:10:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 228 transitions. [2020-10-13 14:10:14,317 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 228 transitions. Word has length 42 [2020-10-13 14:10:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:14,318 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 228 transitions. [2020-10-13 14:10:14,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:10:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 228 transitions. [2020-10-13 14:10:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 14:10:14,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:14,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:14,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:10:14,321 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:14,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:14,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1455185240, now seen corresponding path program 1 times [2020-10-13 14:10:14,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:14,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382784589] [2020-10-13 14:10:14,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:14,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:14,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:14,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:14,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:16,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:16,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 14:10:16,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:10:16,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1972 [2020-10-13 14:10:16,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:16,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:10:16,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:10:16,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:10:16,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:16,528 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-13 14:10:16,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:16,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:16,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:16,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:16,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:16,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 14:10:16,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:16,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:10:16,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:16,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:10:16,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:10:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:16,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382784589] [2020-10-13 14:10:16,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:16,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:10:16,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964958167] [2020-10-13 14:10:16,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:10:16,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:16,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:10:16,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:10:16,587 INFO L87 Difference]: Start difference. First operand 153 states and 228 transitions. Second operand 6 states. [2020-10-13 14:10:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:17,031 INFO L93 Difference]: Finished difference Result 409 states and 630 transitions. [2020-10-13 14:10:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:10:17,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-13 14:10:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:17,035 INFO L225 Difference]: With dead ends: 409 [2020-10-13 14:10:17,035 INFO L226 Difference]: Without dead ends: 279 [2020-10-13 14:10:17,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:10:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-13 14:10:17,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2020-10-13 14:10:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-13 14:10:17,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 420 transitions. [2020-10-13 14:10:17,073 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 420 transitions. Word has length 43 [2020-10-13 14:10:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:17,074 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 420 transitions. [2020-10-13 14:10:17,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:10:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 420 transitions. [2020-10-13 14:10:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 14:10:17,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:17,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:17,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:10:17,076 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:17,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1392752461, now seen corresponding path program 1 times [2020-10-13 14:10:17,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:17,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676756052] [2020-10-13 14:10:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:17,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:17,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:17,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:17,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 14:10:17,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:10:17,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-13 14:10:17,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:17,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:10:17,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:10:17,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 14:10:17,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 14:10:17,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:17,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:17,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:17,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:17,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:17,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:10:17,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:17,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:17,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676756052] [2020-10-13 14:10:17,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:17,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:10:17,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140831216] [2020-10-13 14:10:17,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:10:17,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:17,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:10:17,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:10:17,935 INFO L87 Difference]: Start difference. First operand 277 states and 420 transitions. Second operand 6 states. [2020-10-13 14:10:18,083 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-13 14:10:18,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:18,489 INFO L93 Difference]: Finished difference Result 1801 states and 2802 transitions. [2020-10-13 14:10:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:10:18,491 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-13 14:10:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:18,505 INFO L225 Difference]: With dead ends: 1801 [2020-10-13 14:10:18,506 INFO L226 Difference]: Without dead ends: 1547 [2020-10-13 14:10:18,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:10:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-10-13 14:10:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 529. [2020-10-13 14:10:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-10-13 14:10:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 800 transitions. [2020-10-13 14:10:18,604 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 800 transitions. Word has length 43 [2020-10-13 14:10:18,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:18,605 INFO L479 AbstractCegarLoop]: Abstraction has 529 states and 800 transitions. [2020-10-13 14:10:18,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:10:18,606 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 800 transitions. [2020-10-13 14:10:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 14:10:18,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:18,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:18,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:10:18,609 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:18,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1827141543, now seen corresponding path program 1 times [2020-10-13 14:10:18,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:18,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783044697] [2020-10-13 14:10:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:18,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:18,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:19,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:19,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 14:10:19,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:10:19,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-13 14:10:19,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:19,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:10:19,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:10:19,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:10:19,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:19,392 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-13 14:10:19,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:19,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:19,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:19,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:19,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:19,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:10:19,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:19,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:19,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:19,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:19,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:10:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:19,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783044697] [2020-10-13 14:10:19,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:19,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:10:19,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153647758] [2020-10-13 14:10:19,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:10:19,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:19,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:10:19,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:10:19,442 INFO L87 Difference]: Start difference. First operand 529 states and 800 transitions. Second operand 6 states. [2020-10-13 14:10:19,654 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-13 14:10:20,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:20,097 INFO L93 Difference]: Finished difference Result 2053 states and 3134 transitions. [2020-10-13 14:10:20,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:10:20,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-13 14:10:20,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:20,108 INFO L225 Difference]: With dead ends: 2053 [2020-10-13 14:10:20,109 INFO L226 Difference]: Without dead ends: 1547 [2020-10-13 14:10:20,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:10:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-10-13 14:10:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 529. [2020-10-13 14:10:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-10-13 14:10:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 792 transitions. [2020-10-13 14:10:20,176 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 792 transitions. Word has length 45 [2020-10-13 14:10:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:20,176 INFO L479 AbstractCegarLoop]: Abstraction has 529 states and 792 transitions. [2020-10-13 14:10:20,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:10:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 792 transitions. [2020-10-13 14:10:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 14:10:20,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:20,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:20,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:10:20,179 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:20,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:20,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1807092200, now seen corresponding path program 1 times [2020-10-13 14:10:20,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:20,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308654619] [2020-10-13 14:10:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:20,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:20,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:20,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:20,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:20,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:20,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 14:10:20,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:10:20,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-13 14:10:20,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:20,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:10:20,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 14:10:20,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:10:20,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:20,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:20,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:20,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:20,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:20,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:20,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:10:20,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:20,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:20,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:20,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:20,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:20,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308654619] [2020-10-13 14:10:20,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:20,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:10:20,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225492528] [2020-10-13 14:10:20,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:10:20,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:20,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:10:20,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:10:20,824 INFO L87 Difference]: Start difference. First operand 529 states and 792 transitions. Second operand 4 states. [2020-10-13 14:10:21,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:21,275 INFO L93 Difference]: Finished difference Result 1437 states and 2154 transitions. [2020-10-13 14:10:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:10:21,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-13 14:10:21,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:21,282 INFO L225 Difference]: With dead ends: 1437 [2020-10-13 14:10:21,282 INFO L226 Difference]: Without dead ends: 931 [2020-10-13 14:10:21,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:10:21,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-10-13 14:10:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 897. [2020-10-13 14:10:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-10-13 14:10:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1304 transitions. [2020-10-13 14:10:21,381 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1304 transitions. Word has length 45 [2020-10-13 14:10:21,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:21,381 INFO L479 AbstractCegarLoop]: Abstraction has 897 states and 1304 transitions. [2020-10-13 14:10:21,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:10:21,382 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1304 transitions. [2020-10-13 14:10:21,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 14:10:21,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:21,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:21,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:10:21,383 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:21,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1371414574, now seen corresponding path program 1 times [2020-10-13 14:10:21,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:21,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863395672] [2020-10-13 14:10:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:21,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:21,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:21,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:21,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:21,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:21,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:23,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:26,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:26,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 14:10:26,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:10:26,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:10:26,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:26,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:10:26,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:10:26,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 14:10:26,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:26,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:26,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:26,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:26,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:26,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:26,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:10:26,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:26,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:26,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:26,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:26,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863395672] [2020-10-13 14:10:26,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:26,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:10:26,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745117872] [2020-10-13 14:10:26,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:10:26,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:10:26,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:10:26,528 INFO L87 Difference]: Start difference. First operand 897 states and 1304 transitions. Second operand 5 states. [2020-10-13 14:10:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:27,041 INFO L93 Difference]: Finished difference Result 2398 states and 3487 transitions. [2020-10-13 14:10:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:10:27,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-13 14:10:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:27,053 INFO L225 Difference]: With dead ends: 2398 [2020-10-13 14:10:27,053 INFO L226 Difference]: Without dead ends: 1524 [2020-10-13 14:10:27,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:10:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2020-10-13 14:10:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 902. [2020-10-13 14:10:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 902 states. [2020-10-13 14:10:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1311 transitions. [2020-10-13 14:10:27,211 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1311 transitions. Word has length 46 [2020-10-13 14:10:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:27,212 INFO L479 AbstractCegarLoop]: Abstraction has 902 states and 1311 transitions. [2020-10-13 14:10:27,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:10:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1311 transitions. [2020-10-13 14:10:27,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 14:10:27,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:27,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:27,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:10:27,214 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:27,215 INFO L82 PathProgramCache]: Analyzing trace with hash 804903568, now seen corresponding path program 1 times [2020-10-13 14:10:27,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:27,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099717230] [2020-10-13 14:10:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:27,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:27,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:27,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:27,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 14:10:27,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:10:27,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-13 14:10:27,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:27,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:10:27,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 14:10:27,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:10:27,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:27,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:27,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:27,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:27,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:27,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:27,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:10:27,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:27,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:27,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:27,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:27,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:27,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099717230] [2020-10-13 14:10:27,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:27,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:10:27,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705497143] [2020-10-13 14:10:27,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:10:27,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:27,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:10:27,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:10:27,730 INFO L87 Difference]: Start difference. First operand 902 states and 1311 transitions. Second operand 5 states. [2020-10-13 14:10:28,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:28,252 INFO L93 Difference]: Finished difference Result 1520 states and 2217 transitions. [2020-10-13 14:10:28,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:10:28,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-13 14:10:28,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:28,261 INFO L225 Difference]: With dead ends: 1520 [2020-10-13 14:10:28,262 INFO L226 Difference]: Without dead ends: 1518 [2020-10-13 14:10:28,267 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 14:10:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2020-10-13 14:10:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 918. [2020-10-13 14:10:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2020-10-13 14:10:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1319 transitions. [2020-10-13 14:10:28,403 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1319 transitions. Word has length 46 [2020-10-13 14:10:28,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:28,404 INFO L479 AbstractCegarLoop]: Abstraction has 918 states and 1319 transitions. [2020-10-13 14:10:28,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:10:28,405 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1319 transitions. [2020-10-13 14:10:28,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 14:10:28,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:28,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:28,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:10:28,407 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:28,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:28,407 INFO L82 PathProgramCache]: Analyzing trace with hash 194903052, now seen corresponding path program 1 times [2020-10-13 14:10:28,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:28,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378362090] [2020-10-13 14:10:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:28,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:28,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:28,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:28,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:28,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 14:10:28,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:10:28,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-13 14:10:28,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:28,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:10:28,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:10:28,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:10:28,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:28,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:28,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:28,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:28,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:28,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:28,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:10:28,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:28,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:28,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:28,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378362090] [2020-10-13 14:10:28,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:28,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:10:28,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312642105] [2020-10-13 14:10:28,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:10:28,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:10:28,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:10:28,812 INFO L87 Difference]: Start difference. First operand 918 states and 1319 transitions. Second operand 4 states. [2020-10-13 14:10:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:29,241 INFO L93 Difference]: Finished difference Result 2024 states and 2919 transitions. [2020-10-13 14:10:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:10:29,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-13 14:10:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:29,248 INFO L225 Difference]: With dead ends: 2024 [2020-10-13 14:10:29,248 INFO L226 Difference]: Without dead ends: 1132 [2020-10-13 14:10:29,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:10:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2020-10-13 14:10:29,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1122. [2020-10-13 14:10:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1122 states. [2020-10-13 14:10:29,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1598 transitions. [2020-10-13 14:10:29,397 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1598 transitions. Word has length 46 [2020-10-13 14:10:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:29,398 INFO L479 AbstractCegarLoop]: Abstraction has 1122 states and 1598 transitions. [2020-10-13 14:10:29,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:10:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1598 transitions. [2020-10-13 14:10:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 14:10:29,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:29,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:29,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:10:29,400 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:29,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:29,400 INFO L82 PathProgramCache]: Analyzing trace with hash 213972523, now seen corresponding path program 1 times [2020-10-13 14:10:29,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:29,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122783096] [2020-10-13 14:10:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:29,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:29,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:29,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:29,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:30,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:30,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 14:10:30,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:10:30,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-13 14:10:30,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:30,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:10:30,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:10:30,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 14:10:30,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:30,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:30,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:30,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:30,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:30,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:30,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:10:30,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:30,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:30,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:30,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:30,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:30,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122783096] [2020-10-13 14:10:30,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:30,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:10:30,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397798726] [2020-10-13 14:10:30,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:10:30,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:30,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:10:30,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:10:30,191 INFO L87 Difference]: Start difference. First operand 1122 states and 1598 transitions. Second operand 4 states. [2020-10-13 14:10:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:30,787 INFO L93 Difference]: Finished difference Result 2454 states and 3528 transitions. [2020-10-13 14:10:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:10:30,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-13 14:10:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:30,797 INFO L225 Difference]: With dead ends: 2454 [2020-10-13 14:10:30,797 INFO L226 Difference]: Without dead ends: 1561 [2020-10-13 14:10:30,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:10:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2020-10-13 14:10:30,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1559. [2020-10-13 14:10:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1559 states. [2020-10-13 14:10:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2202 transitions. [2020-10-13 14:10:30,983 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2202 transitions. Word has length 47 [2020-10-13 14:10:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:30,983 INFO L479 AbstractCegarLoop]: Abstraction has 1559 states and 2202 transitions. [2020-10-13 14:10:30,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:10:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2202 transitions. [2020-10-13 14:10:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 14:10:30,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:30,985 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:30,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:10:30,985 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:30,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:30,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1089155933, now seen corresponding path program 1 times [2020-10-13 14:10:30,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:30,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102033977] [2020-10-13 14:10:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:31,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:31,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:31,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:31,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:31,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:31,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:31,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:31,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:32,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:32,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:32,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:32,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:34,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:34,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:34,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:34,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:36,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:36,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 14:10:36,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 14:10:36,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:10:36,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:36,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:10:36,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 14:10:36,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:10:36,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:10:36,230 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-13 14:10:36,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:36,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:36,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:36,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:36,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:36,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:10:36,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:36,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:36,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:36,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:36,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:10:36,266 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 14:10:36,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102033977] [2020-10-13 14:10:36,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:36,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:10:36,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695196979] [2020-10-13 14:10:36,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:10:36,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:36,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:10:36,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:10:36,269 INFO L87 Difference]: Start difference. First operand 1559 states and 2202 transitions. Second operand 4 states. [2020-10-13 14:10:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:36,682 INFO L93 Difference]: Finished difference Result 2917 states and 4132 transitions. [2020-10-13 14:10:36,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:10:36,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 14:10:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:36,690 INFO L225 Difference]: With dead ends: 2917 [2020-10-13 14:10:36,690 INFO L226 Difference]: Without dead ends: 1383 [2020-10-13 14:10:36,694 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 14:10:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2020-10-13 14:10:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1333. [2020-10-13 14:10:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2020-10-13 14:10:36,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1865 transitions. [2020-10-13 14:10:36,844 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1865 transitions. Word has length 65 [2020-10-13 14:10:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:36,845 INFO L479 AbstractCegarLoop]: Abstraction has 1333 states and 1865 transitions. [2020-10-13 14:10:36,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:10:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1865 transitions. [2020-10-13 14:10:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:10:36,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:36,846 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:36,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:10:36,847 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:36,847 INFO L82 PathProgramCache]: Analyzing trace with hash -860091898, now seen corresponding path program 1 times [2020-10-13 14:10:36,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:36,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097841301] [2020-10-13 14:10:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:36,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:36,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:36,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:37,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:39,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:39,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:39,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:39,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:40,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:40,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:40,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:41,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:41,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:41,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:41,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:41,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:41,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:10:41,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:10:41,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:10:41,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:10:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:10:41,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 14:10:41,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:42,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:42,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:42,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:42,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:42,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:42,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:10:42,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:10:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:10:42,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:10:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 14:10:42,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097841301] [2020-10-13 14:10:42,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:42,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:10:42,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298284547] [2020-10-13 14:10:42,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:10:42,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:42,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:10:42,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:10:42,062 INFO L87 Difference]: Start difference. First operand 1333 states and 1865 transitions. Second operand 6 states. [2020-10-13 14:10:42,221 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-13 14:10:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:42,767 INFO L93 Difference]: Finished difference Result 3885 states and 5447 transitions. [2020-10-13 14:10:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:10:42,768 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-13 14:10:42,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:42,780 INFO L225 Difference]: With dead ends: 3885 [2020-10-13 14:10:42,781 INFO L226 Difference]: Without dead ends: 2591 [2020-10-13 14:10:42,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:10:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2020-10-13 14:10:43,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2589. [2020-10-13 14:10:43,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2589 states. [2020-10-13 14:10:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3600 transitions. [2020-10-13 14:10:43,086 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3600 transitions. Word has length 66 [2020-10-13 14:10:43,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:43,086 INFO L479 AbstractCegarLoop]: Abstraction has 2589 states and 3600 transitions. [2020-10-13 14:10:43,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:10:43,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3600 transitions. [2020-10-13 14:10:43,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:10:43,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:43,088 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:43,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:10:43,088 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:43,089 INFO L82 PathProgramCache]: Analyzing trace with hash -491820671, now seen corresponding path program 1 times [2020-10-13 14:10:43,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:43,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577052074] [2020-10-13 14:10:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:43,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:43,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:43,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:43,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:43,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:46,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:46,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:46,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:46,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:47,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:47,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:47,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:47,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:48,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:48,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:10:48,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:10:48,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:10:48,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:48,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:10:48,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:10:48,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 14:10:48,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:48,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:48,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:48,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:48,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:48,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:48,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:10:48,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:48,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:48,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:48,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:48,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:48,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577052074] [2020-10-13 14:10:48,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:10:48,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:10:48,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123719054] [2020-10-13 14:10:48,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:10:48,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:48,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:10:48,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:10:48,444 INFO L87 Difference]: Start difference. First operand 2589 states and 3600 transitions. Second operand 9 states. [2020-10-13 14:10:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:50,967 INFO L93 Difference]: Finished difference Result 9880 states and 13645 transitions. [2020-10-13 14:10:50,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 14:10:50,968 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-10-13 14:10:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:51,011 INFO L225 Difference]: With dead ends: 9880 [2020-10-13 14:10:51,011 INFO L226 Difference]: Without dead ends: 7342 [2020-10-13 14:10:51,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:10:51,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7342 states. [2020-10-13 14:10:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7342 to 4044. [2020-10-13 14:10:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4044 states. [2020-10-13 14:10:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 5603 transitions. [2020-10-13 14:10:51,597 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 5603 transitions. Word has length 66 [2020-10-13 14:10:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:51,597 INFO L479 AbstractCegarLoop]: Abstraction has 4044 states and 5603 transitions. [2020-10-13 14:10:51,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:10:51,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 5603 transitions. [2020-10-13 14:10:51,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:10:51,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:51,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:51,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:10:51,600 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:51,600 INFO L82 PathProgramCache]: Analyzing trace with hash -864346565, now seen corresponding path program 1 times [2020-10-13 14:10:51,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:51,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333883372] [2020-10-13 14:10:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:51,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:51,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:51,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:51,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:51,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:52,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:52,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:52,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:52,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:52,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:52,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:52,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:56,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:56,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:10:56,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:10:56,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:10:56,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:56,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:10:56,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:10:56,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:10:56,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:56,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:56,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:56,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:56,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:56,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:56,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:10:56,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:56,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:56,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:56,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:56,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:56,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333883372] [2020-10-13 14:10:56,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:10:56,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:10:56,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141516712] [2020-10-13 14:10:56,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:10:56,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:56,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:10:56,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:10:56,955 INFO L87 Difference]: Start difference. First operand 4044 states and 5603 transitions. Second operand 12 states. [2020-10-13 14:10:57,335 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 106 [2020-10-13 14:11:00,068 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-10-13 14:11:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:02,474 INFO L93 Difference]: Finished difference Result 18464 states and 25137 transitions. [2020-10-13 14:11:02,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-13 14:11:02,474 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-13 14:11:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:02,543 INFO L225 Difference]: With dead ends: 18464 [2020-10-13 14:11:02,544 INFO L226 Difference]: Without dead ends: 14482 [2020-10-13 14:11:02,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=824, Invalid=3868, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 14:11:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14482 states. [2020-10-13 14:11:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14482 to 6600. [2020-10-13 14:11:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6600 states. [2020-10-13 14:11:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6600 states to 6600 states and 9101 transitions. [2020-10-13 14:11:03,528 INFO L78 Accepts]: Start accepts. Automaton has 6600 states and 9101 transitions. Word has length 66 [2020-10-13 14:11:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:03,529 INFO L479 AbstractCegarLoop]: Abstraction has 6600 states and 9101 transitions. [2020-10-13 14:11:03,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:11:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 6600 states and 9101 transitions. [2020-10-13 14:11:03,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:11:03,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:03,531 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:11:03,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:11:03,531 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:03,531 INFO L82 PathProgramCache]: Analyzing trace with hash 2108222811, now seen corresponding path program 1 times [2020-10-13 14:11:03,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:03,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892852045] [2020-10-13 14:11:03,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:03,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:03,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:03,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:03,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:04,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:04,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:04,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:04,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:04,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:04,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:04,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:05,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:08,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:08,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:11:08,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:11:08,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:11:08,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:08,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:11:08,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:11:08,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 14:11:08,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:08,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:08,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:08,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:08,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:08,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:08,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:11:08,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:08,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:08,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:08,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:08,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 14:11:08,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892852045] [2020-10-13 14:11:08,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:08,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:11:08,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235148953] [2020-10-13 14:11:08,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:11:08,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:08,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:11:08,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:11:08,656 INFO L87 Difference]: Start difference. First operand 6600 states and 9101 transitions. Second operand 4 states. [2020-10-13 14:11:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:09,388 INFO L93 Difference]: Finished difference Result 12737 states and 17641 transitions. [2020-10-13 14:11:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:11:09,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-13 14:11:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:09,404 INFO L225 Difference]: With dead ends: 12737 [2020-10-13 14:11:09,404 INFO L226 Difference]: Without dead ends: 6209 [2020-10-13 14:11:09,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:11:09,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2020-10-13 14:11:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 6209. [2020-10-13 14:11:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6209 states. [2020-10-13 14:11:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6209 states to 6209 states and 8537 transitions. [2020-10-13 14:11:09,978 INFO L78 Accepts]: Start accepts. Automaton has 6209 states and 8537 transitions. Word has length 67 [2020-10-13 14:11:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:09,978 INFO L479 AbstractCegarLoop]: Abstraction has 6209 states and 8537 transitions. [2020-10-13 14:11:09,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:11:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 6209 states and 8537 transitions. [2020-10-13 14:11:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:11:09,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:09,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:11:09,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:11:09,980 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:09,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:09,980 INFO L82 PathProgramCache]: Analyzing trace with hash 538028160, now seen corresponding path program 1 times [2020-10-13 14:11:09,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:09,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972965676] [2020-10-13 14:11:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:10,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:10,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:10,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:10,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:10,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:10,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:10,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:11,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:11,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:11,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:11,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:11,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:11,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:12,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:12,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:14,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:14,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:11:14,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:11:14,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:11:14,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:14,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:11:14,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:11:14,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:11:14,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:15,225 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 26 [2020-10-13 14:11:15,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:15,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:15,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:15,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:15,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:15,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:11:15,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:15,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:15,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972965676] [2020-10-13 14:11:15,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:11:15,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:11:15,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778399343] [2020-10-13 14:11:15,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:11:15,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:15,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:11:15,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:11:15,422 INFO L87 Difference]: Start difference. First operand 6209 states and 8537 transitions. Second operand 12 states. [2020-10-13 14:11:15,675 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:11:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:21,022 INFO L93 Difference]: Finished difference Result 30584 states and 41334 transitions. [2020-10-13 14:11:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 14:11:21,023 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-13 14:11:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:21,083 INFO L225 Difference]: With dead ends: 30584 [2020-10-13 14:11:21,083 INFO L226 Difference]: Without dead ends: 24447 [2020-10-13 14:11:21,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=403, Invalid=1949, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 14:11:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24447 states. [2020-10-13 14:11:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24447 to 13456. [2020-10-13 14:11:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13456 states. [2020-10-13 14:11:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13456 states to 13456 states and 18452 transitions. [2020-10-13 14:11:22,842 INFO L78 Accepts]: Start accepts. Automaton has 13456 states and 18452 transitions. Word has length 67 [2020-10-13 14:11:22,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:22,843 INFO L479 AbstractCegarLoop]: Abstraction has 13456 states and 18452 transitions. [2020-10-13 14:11:22,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:11:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 13456 states and 18452 transitions. [2020-10-13 14:11:22,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:11:22,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:22,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:11:22,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:11:22,845 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash 561773382, now seen corresponding path program 1 times [2020-10-13 14:11:22,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:22,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348348461] [2020-10-13 14:11:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:22,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:22,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:22,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:23,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:23,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:23,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:27,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:27,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:11:27,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:11:27,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:11:27,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:27,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:11:27,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:11:27,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:11:27,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:28,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:28,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:28,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:28,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:28,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:28,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:11:28,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:28,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:28,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:28,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:28,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:28,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348348461] [2020-10-13 14:11:28,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:11:28,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:11:28,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686098327] [2020-10-13 14:11:28,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:11:28,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:28,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:11:28,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:11:28,199 INFO L87 Difference]: Start difference. First operand 13456 states and 18452 transitions. Second operand 13 states. [2020-10-13 14:11:28,373 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-13 14:11:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:33,130 INFO L93 Difference]: Finished difference Result 32598 states and 44388 transitions. [2020-10-13 14:11:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 14:11:33,130 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-13 14:11:33,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:33,177 INFO L225 Difference]: With dead ends: 32598 [2020-10-13 14:11:33,177 INFO L226 Difference]: Without dead ends: 24502 [2020-10-13 14:11:33,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=1106, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 14:11:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24502 states. [2020-10-13 14:11:34,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24502 to 13528. [2020-10-13 14:11:34,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13528 states. [2020-10-13 14:11:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 18542 transitions. [2020-10-13 14:11:34,988 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 18542 transitions. Word has length 67 [2020-10-13 14:11:34,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:34,989 INFO L479 AbstractCegarLoop]: Abstraction has 13528 states and 18542 transitions. [2020-10-13 14:11:34,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:11:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 18542 transitions. [2020-10-13 14:11:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:11:34,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:34,994 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:11:34,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:11:34,994 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:34,995 INFO L82 PathProgramCache]: Analyzing trace with hash 340361437, now seen corresponding path program 1 times [2020-10-13 14:11:34,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:34,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840338273] [2020-10-13 14:11:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:35,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:35,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:35,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:35,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:35,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:35,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:35,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:40,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:40,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:11:40,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:11:40,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5479 [2020-10-13 14:11:40,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:40,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:11:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:11:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:11:40,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:40,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:40,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:40,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:40,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:40,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:40,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:11:40,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:40,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:40,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:40,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:40,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:40,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840338273] [2020-10-13 14:11:40,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:11:40,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 14:11:40,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458891014] [2020-10-13 14:11:40,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:11:40,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:40,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:11:40,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:11:40,774 INFO L87 Difference]: Start difference. First operand 13528 states and 18542 transitions. Second operand 10 states. [2020-10-13 14:11:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:44,208 INFO L93 Difference]: Finished difference Result 32518 states and 44373 transitions. [2020-10-13 14:11:44,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 14:11:44,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-13 14:11:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:44,239 INFO L225 Difference]: With dead ends: 32518 [2020-10-13 14:11:44,240 INFO L226 Difference]: Without dead ends: 19094 [2020-10-13 14:11:44,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:11:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19094 states. [2020-10-13 14:11:45,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19094 to 13510. [2020-10-13 14:11:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13510 states. [2020-10-13 14:11:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13510 states to 13510 states and 18485 transitions. [2020-10-13 14:11:45,894 INFO L78 Accepts]: Start accepts. Automaton has 13510 states and 18485 transitions. Word has length 67 [2020-10-13 14:11:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:45,894 INFO L479 AbstractCegarLoop]: Abstraction has 13510 states and 18485 transitions. [2020-10-13 14:11:45,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:11:45,894 INFO L276 IsEmpty]: Start isEmpty. Operand 13510 states and 18485 transitions. [2020-10-13 14:11:45,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:11:45,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:45,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:11:45,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:11:45,896 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:45,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:45,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1312616123, now seen corresponding path program 1 times [2020-10-13 14:11:45,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:45,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154446712] [2020-10-13 14:11:45,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:45,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:45,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:46,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:46,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:46,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:46,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:46,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:46,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:46,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:46,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:47,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:47,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:50,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:50,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:11:50,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:11:50,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:11:50,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:50,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:11:50,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:11:50,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 14:11:50,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:51,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:51,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:51,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:51,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:51,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:51,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:11:51,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:51,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:11:51,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:51,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:11:51,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 14:11:51,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154446712] [2020-10-13 14:11:51,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:51,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:11:51,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377083633] [2020-10-13 14:11:51,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:11:51,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:51,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:11:51,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:11:51,051 INFO L87 Difference]: Start difference. First operand 13510 states and 18485 transitions. Second operand 6 states. [2020-10-13 14:11:53,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:53,643 INFO L93 Difference]: Finished difference Result 32973 states and 45100 transitions. [2020-10-13 14:11:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:11:53,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-13 14:11:53,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:53,668 INFO L225 Difference]: With dead ends: 32973 [2020-10-13 14:11:53,669 INFO L226 Difference]: Without dead ends: 19533 [2020-10-13 14:11:53,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:11:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19533 states. [2020-10-13 14:11:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19533 to 19531. [2020-10-13 14:11:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19531 states. [2020-10-13 14:11:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19531 states to 19531 states and 26423 transitions. [2020-10-13 14:11:56,060 INFO L78 Accepts]: Start accepts. Automaton has 19531 states and 26423 transitions. Word has length 67 [2020-10-13 14:11:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:56,060 INFO L479 AbstractCegarLoop]: Abstraction has 19531 states and 26423 transitions. [2020-10-13 14:11:56,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:11:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 19531 states and 26423 transitions. [2020-10-13 14:11:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:11:56,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:56,062 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:11:56,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:11:56,063 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:56,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:56,063 INFO L82 PathProgramCache]: Analyzing trace with hash 277025937, now seen corresponding path program 1 times [2020-10-13 14:11:56,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:56,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955608863] [2020-10-13 14:11:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:56,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:56,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:56,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:56,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:56,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:58,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:58,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:11:58,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:11:58,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2166 [2020-10-13 14:11:58,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:11:58,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:11:58,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:11:58,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:58,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:58,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:58,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:58,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:58,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:58,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:11:58,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:58,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:58,365 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 14:11:58,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955608863] [2020-10-13 14:11:58,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:58,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:11:58,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467298808] [2020-10-13 14:11:58,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:11:58,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:11:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:11:58,367 INFO L87 Difference]: Start difference. First operand 19531 states and 26423 transitions. Second operand 4 states. [2020-10-13 14:11:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:59,833 INFO L93 Difference]: Finished difference Result 29882 states and 40176 transitions. [2020-10-13 14:11:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:11:59,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-13 14:11:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:59,847 INFO L225 Difference]: With dead ends: 29882 [2020-10-13 14:11:59,847 INFO L226 Difference]: Without dead ends: 10455 [2020-10-13 14:11:59,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:11:59,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10455 states. [2020-10-13 14:12:01,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10455 to 10453. [2020-10-13 14:12:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10453 states. [2020-10-13 14:12:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10453 states to 10453 states and 13742 transitions. [2020-10-13 14:12:01,245 INFO L78 Accepts]: Start accepts. Automaton has 10453 states and 13742 transitions. Word has length 68 [2020-10-13 14:12:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:01,246 INFO L479 AbstractCegarLoop]: Abstraction has 10453 states and 13742 transitions. [2020-10-13 14:12:01,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:12:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10453 states and 13742 transitions. [2020-10-13 14:12:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:12:01,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:01,248 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] [2020-10-13 14:12:01,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:12:01,248 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash 689787473, now seen corresponding path program 1 times [2020-10-13 14:12:01,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:01,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144230717] [2020-10-13 14:12:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:01,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:01,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:01,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:01,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:02,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:02,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:03,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:03,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:12:03,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:12:03,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2300 [2020-10-13 14:12:03,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:03,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:12:03,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:12:03,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:12:03,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:03,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:03,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:03,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:03,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:03,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:03,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:12:03,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:03,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:12:03,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:03,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:12:03,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:12:03,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144230717] [2020-10-13 14:12:03,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:12:03,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:12:03,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115775148] [2020-10-13 14:12:03,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:12:03,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:03,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:12:03,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:12:03,889 INFO L87 Difference]: Start difference. First operand 10453 states and 13742 transitions. Second operand 13 states. [2020-10-13 14:12:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:08,019 INFO L93 Difference]: Finished difference Result 26964 states and 35424 transitions. [2020-10-13 14:12:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 14:12:08,019 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-10-13 14:12:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:08,040 INFO L225 Difference]: With dead ends: 26964 [2020-10-13 14:12:08,040 INFO L226 Difference]: Without dead ends: 18026 [2020-10-13 14:12:08,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2020-10-13 14:12:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18026 states. [2020-10-13 14:12:09,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18026 to 10469. [2020-10-13 14:12:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10469 states. [2020-10-13 14:12:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10469 states to 10469 states and 13774 transitions. [2020-10-13 14:12:09,485 INFO L78 Accepts]: Start accepts. Automaton has 10469 states and 13774 transitions. Word has length 68 [2020-10-13 14:12:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:09,485 INFO L479 AbstractCegarLoop]: Abstraction has 10469 states and 13774 transitions. [2020-10-13 14:12:09,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:12:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10469 states and 13774 transitions. [2020-10-13 14:12:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:12:09,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:09,487 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] [2020-10-13 14:12:09,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:12:09,487 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:09,488 INFO L82 PathProgramCache]: Analyzing trace with hash 911266292, now seen corresponding path program 1 times [2020-10-13 14:12:09,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:09,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843189330] [2020-10-13 14:12:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:09,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:09,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:09,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:09,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:09,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:09,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:12,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:12,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:12:12,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:12:12,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2595 [2020-10-13 14:12:12,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:12,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:12:12,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 14:12:12,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 14:12:12,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:12,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:12,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:12,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:12,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:12,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:12,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:12:12,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:12,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:12:12,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:12,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:12:12,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:12:12,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843189330] [2020-10-13 14:12:12,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:12:12,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 14:12:12,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859229176] [2020-10-13 14:12:12,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:12:12,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:12,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:12:12,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:12:12,217 INFO L87 Difference]: Start difference. First operand 10469 states and 13774 transitions. Second operand 6 states. [2020-10-13 14:12:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:14,919 INFO L93 Difference]: Finished difference Result 29014 states and 38531 transitions. [2020-10-13 14:12:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:12:14,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-13 14:12:14,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:14,942 INFO L225 Difference]: With dead ends: 29014 [2020-10-13 14:12:14,943 INFO L226 Difference]: Without dead ends: 18649 [2020-10-13 14:12:14,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:12:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18649 states. [2020-10-13 14:12:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18649 to 18645. [2020-10-13 14:12:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18645 states. [2020-10-13 14:12:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18645 states to 18645 states and 24454 transitions. [2020-10-13 14:12:17,410 INFO L78 Accepts]: Start accepts. Automaton has 18645 states and 24454 transitions. Word has length 68 [2020-10-13 14:12:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:17,410 INFO L479 AbstractCegarLoop]: Abstraction has 18645 states and 24454 transitions. [2020-10-13 14:12:17,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:12:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 18645 states and 24454 transitions. [2020-10-13 14:12:17,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:12:17,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:17,412 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:12:17,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 14:12:17,412 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:17,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2035808938, now seen corresponding path program 1 times [2020-10-13 14:12:17,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:17,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061059800] [2020-10-13 14:12:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:17,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:17,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:17,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:17,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:17,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:17,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:18,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:18,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:12:18,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:12:18,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-10-13 14:12:18,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:18,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:12:18,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:12:18,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 14:12:18,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:18,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:18,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:18,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:18,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:18,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:18,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:12:18,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:18,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:12:18,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:18,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:12:18,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:12:18,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061059800] [2020-10-13 14:12:18,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:12:18,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:12:18,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760429735] [2020-10-13 14:12:18,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:12:18,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:18,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:12:18,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:12:18,802 INFO L87 Difference]: Start difference. First operand 18645 states and 24454 transitions. Second operand 13 states. [2020-10-13 14:12:19,103 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2020-10-13 14:12:24,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:24,562 INFO L93 Difference]: Finished difference Result 38558 states and 50213 transitions. [2020-10-13 14:12:24,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 14:12:24,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-10-13 14:12:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:24,598 INFO L225 Difference]: With dead ends: 38558 [2020-10-13 14:12:24,598 INFO L226 Difference]: Without dead ends: 27314 [2020-10-13 14:12:24,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 14:12:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27314 states. [2020-10-13 14:12:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27314 to 18859. [2020-10-13 14:12:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18859 states. [2020-10-13 14:12:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18859 states to 18859 states and 24696 transitions. [2020-10-13 14:12:26,983 INFO L78 Accepts]: Start accepts. Automaton has 18859 states and 24696 transitions. Word has length 69 [2020-10-13 14:12:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:26,983 INFO L479 AbstractCegarLoop]: Abstraction has 18859 states and 24696 transitions. [2020-10-13 14:12:26,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:12:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 18859 states and 24696 transitions. [2020-10-13 14:12:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:12:26,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:26,985 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] [2020-10-13 14:12:26,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 14:12:26,985 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash -796470122, now seen corresponding path program 1 times [2020-10-13 14:12:26,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:26,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135172287] [2020-10-13 14:12:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:27,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:27,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:27,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:27,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:27,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:27,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:27,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:27,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:12:27,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:12:27,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 967 [2020-10-13 14:12:27,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:27,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:12:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 14:12:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:12:27,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:28,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:28,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:28,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:28,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:28,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:28,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:12:28,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:28,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:12:28,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:28,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:12:28,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:12:28,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135172287] [2020-10-13 14:12:28,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:12:28,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:12:28,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855705440] [2020-10-13 14:12:28,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:12:28,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:28,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:12:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:12:28,091 INFO L87 Difference]: Start difference. First operand 18859 states and 24696 transitions. Second operand 4 states. [2020-10-13 14:12:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:29,725 INFO L93 Difference]: Finished difference Result 29750 states and 38792 transitions. [2020-10-13 14:12:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:12:29,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-13 14:12:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:29,738 INFO L225 Difference]: With dead ends: 29750 [2020-10-13 14:12:29,738 INFO L226 Difference]: Without dead ends: 10995 [2020-10-13 14:12:29,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:12:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10995 states. [2020-10-13 14:12:31,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10995 to 10993. [2020-10-13 14:12:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10993 states. [2020-10-13 14:12:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10993 states to 10993 states and 14002 transitions. [2020-10-13 14:12:31,271 INFO L78 Accepts]: Start accepts. Automaton has 10993 states and 14002 transitions. Word has length 69 [2020-10-13 14:12:31,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:31,271 INFO L479 AbstractCegarLoop]: Abstraction has 10993 states and 14002 transitions. [2020-10-13 14:12:31,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:12:31,271 INFO L276 IsEmpty]: Start isEmpty. Operand 10993 states and 14002 transitions. [2020-10-13 14:12:31,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:12:31,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:31,273 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:12:31,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 14:12:31,273 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:31,274 INFO L82 PathProgramCache]: Analyzing trace with hash -353364311, now seen corresponding path program 1 times [2020-10-13 14:12:31,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:31,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759476889] [2020-10-13 14:12:31,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:31,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:31,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:31,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:32,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:32,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:12:32,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:12:32,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-13 14:12:32,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:32,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:12:32,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:12:32,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 14:12:32,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:32,434 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2020-10-13 14:12:32,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:32,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:32,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:32,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:32,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:32,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:12:32,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:32,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:12:32,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:32,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:12:32,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:12:32,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759476889] [2020-10-13 14:12:32,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:12:32,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 14:12:32,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458053543] [2020-10-13 14:12:32,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:12:32,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:32,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:12:32,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:12:32,598 INFO L87 Difference]: Start difference. First operand 10993 states and 14002 transitions. Second operand 10 states. [2020-10-13 14:12:32,737 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-13 14:12:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:36,370 INFO L93 Difference]: Finished difference Result 26857 states and 34369 transitions. [2020-10-13 14:12:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 14:12:36,371 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-13 14:12:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:36,387 INFO L225 Difference]: With dead ends: 26857 [2020-10-13 14:12:36,387 INFO L226 Difference]: Without dead ends: 15968 [2020-10-13 14:12:36,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-13 14:12:36,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15968 states. [2020-10-13 14:12:38,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15968 to 11271. [2020-10-13 14:12:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11271 states. [2020-10-13 14:12:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11271 states to 11271 states and 14368 transitions. [2020-10-13 14:12:38,294 INFO L78 Accepts]: Start accepts. Automaton has 11271 states and 14368 transitions. Word has length 69 [2020-10-13 14:12:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:38,294 INFO L479 AbstractCegarLoop]: Abstraction has 11271 states and 14368 transitions. [2020-10-13 14:12:38,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:12:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 11271 states and 14368 transitions. [2020-10-13 14:12:38,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:12:38,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:38,295 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:12:38,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 14:12:38,296 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:38,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1028339044, now seen corresponding path program 1 times [2020-10-13 14:12:38,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:38,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812057320] [2020-10-13 14:12:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:38,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:38,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:38,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:38,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:38,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:38,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:39,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:42,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:42,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:12:42,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:12:42,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3904 [2020-10-13 14:12:42,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:12:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:12:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 14:12:42,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:42,548 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-13 14:12:42,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:42,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:42,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:42,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:42,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:42,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 14:12:42,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:42,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:12:42,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:42,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:12:42,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:12:42,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812057320] [2020-10-13 14:12:42,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:12:42,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:12:42,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139580976] [2020-10-13 14:12:42,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:12:42,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:42,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:12:42,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:12:42,565 INFO L87 Difference]: Start difference. First operand 11271 states and 14368 transitions. Second operand 9 states. [2020-10-13 14:12:46,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:46,745 INFO L93 Difference]: Finished difference Result 27235 states and 34779 transitions. [2020-10-13 14:12:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 14:12:46,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-13 14:12:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:46,758 INFO L225 Difference]: With dead ends: 27235 [2020-10-13 14:12:46,758 INFO L226 Difference]: Without dead ends: 16068 [2020-10-13 14:12:46,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-10-13 14:12:46,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16068 states. [2020-10-13 14:12:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16068 to 11239. [2020-10-13 14:12:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11239 states. [2020-10-13 14:12:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11239 states to 11239 states and 14288 transitions. [2020-10-13 14:12:48,478 INFO L78 Accepts]: Start accepts. Automaton has 11239 states and 14288 transitions. Word has length 69 [2020-10-13 14:12:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:48,478 INFO L479 AbstractCegarLoop]: Abstraction has 11239 states and 14288 transitions. [2020-10-13 14:12:48,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:12:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 11239 states and 14288 transitions. [2020-10-13 14:12:48,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:12:48,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:48,487 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:12:48,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 14:12:48,488 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:48,489 INFO L82 PathProgramCache]: Analyzing trace with hash -288896295, now seen corresponding path program 1 times [2020-10-13 14:12:48,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:48,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811010059] [2020-10-13 14:12:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:48,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:48,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:48,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:48,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:48,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:49,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:49,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:49,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:49,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:51,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:51,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:12:51,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:12:51,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3129 [2020-10-13 14:12:51,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:51,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:12:51,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:12:51,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 14:12:51,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:51,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:51,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:51,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:51,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:51,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:51,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:12:51,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:51,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:12:51,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:51,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:12:51,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 14:12:51,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811010059] [2020-10-13 14:12:51,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:12:51,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:12:51,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670231010] [2020-10-13 14:12:51,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:12:51,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:12:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:12:51,736 INFO L87 Difference]: Start difference. First operand 11239 states and 14288 transitions. Second operand 4 states. [2020-10-13 14:12:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:53,237 INFO L93 Difference]: Finished difference Result 19756 states and 25190 transitions. [2020-10-13 14:12:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:12:53,238 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-13 14:12:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:53,247 INFO L225 Difference]: With dead ends: 19756 [2020-10-13 14:12:53,248 INFO L226 Difference]: Without dead ends: 8582 [2020-10-13 14:12:53,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:12:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8582 states. [2020-10-13 14:12:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8582 to 8582. [2020-10-13 14:12:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8582 states. [2020-10-13 14:12:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8582 states to 8582 states and 10851 transitions. [2020-10-13 14:12:54,686 INFO L78 Accepts]: Start accepts. Automaton has 8582 states and 10851 transitions. Word has length 69 [2020-10-13 14:12:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:54,686 INFO L479 AbstractCegarLoop]: Abstraction has 8582 states and 10851 transitions. [2020-10-13 14:12:54,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:12:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 8582 states and 10851 transitions. [2020-10-13 14:12:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:12:54,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:54,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:12:54,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 14:12:54,688 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:54,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:54,688 INFO L82 PathProgramCache]: Analyzing trace with hash 953232695, now seen corresponding path program 1 times [2020-10-13 14:12:54,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:54,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984588530] [2020-10-13 14:12:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:54,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:54,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:54,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:55,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:55,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:55,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:55,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:12:55,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:12:55,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 934 [2020-10-13 14:12:55,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:55,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:12:55,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:12:55,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 14:12:55,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:55,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:55,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:55,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:55,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:55,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:55,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:12:55,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:55,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:12:55,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:55,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:12:55,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:12:55,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984588530] [2020-10-13 14:12:55,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:12:55,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:12:55,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769614307] [2020-10-13 14:12:55,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:12:55,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:55,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:12:55,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:12:55,920 INFO L87 Difference]: Start difference. First operand 8582 states and 10851 transitions. Second operand 9 states. [2020-10-13 14:12:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:59,855 INFO L93 Difference]: Finished difference Result 22348 states and 27934 transitions. [2020-10-13 14:12:59,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 14:12:59,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-10-13 14:12:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:59,871 INFO L225 Difference]: With dead ends: 22348 [2020-10-13 14:12:59,871 INFO L226 Difference]: Without dead ends: 13831 [2020-10-13 14:12:59,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-10-13 14:12:59,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13831 states. [2020-10-13 14:13:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13831 to 8714. [2020-10-13 14:13:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8714 states. [2020-10-13 14:13:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8714 states to 8714 states and 10983 transitions. [2020-10-13 14:13:01,296 INFO L78 Accepts]: Start accepts. Automaton has 8714 states and 10983 transitions. Word has length 70 [2020-10-13 14:13:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:01,296 INFO L479 AbstractCegarLoop]: Abstraction has 8714 states and 10983 transitions. [2020-10-13 14:13:01,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:13:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 8714 states and 10983 transitions. [2020-10-13 14:13:01,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:13:01,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:01,298 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:01,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 14:13:01,298 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash 974607051, now seen corresponding path program 1 times [2020-10-13 14:13:01,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:01,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298231360] [2020-10-13 14:13:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:01,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:01,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:01,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:02,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:02,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:02,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:13:02,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:13:02,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1265 [2020-10-13 14:13:02,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 14:13:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:13:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 14:13:02,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:03,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:03,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:03,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:03,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:03,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:03,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:13:03,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:03,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:13:03,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298231360] [2020-10-13 14:13:03,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:13:03,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 14:13:03,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240540905] [2020-10-13 14:13:03,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 14:13:03,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:03,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 14:13:03,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-13 14:13:03,302 INFO L87 Difference]: Start difference. First operand 8714 states and 10983 transitions. Second operand 21 states. [2020-10-13 14:13:03,458 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-13 14:13:03,898 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 128 [2020-10-13 14:13:04,708 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-13 14:13:04,904 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-13 14:13:05,101 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-13 14:13:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:08,066 INFO L93 Difference]: Finished difference Result 12160 states and 15394 transitions. [2020-10-13 14:13:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 14:13:08,067 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2020-10-13 14:13:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:08,077 INFO L225 Difference]: With dead ends: 12160 [2020-10-13 14:13:08,077 INFO L226 Difference]: Without dead ends: 8924 [2020-10-13 14:13:08,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 14:13:08,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8924 states. [2020-10-13 14:13:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8924 to 8726. [2020-10-13 14:13:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8726 states. [2020-10-13 14:13:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8726 states to 8726 states and 10995 transitions. [2020-10-13 14:13:09,632 INFO L78 Accepts]: Start accepts. Automaton has 8726 states and 10995 transitions. Word has length 70 [2020-10-13 14:13:09,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:09,632 INFO L479 AbstractCegarLoop]: Abstraction has 8726 states and 10995 transitions. [2020-10-13 14:13:09,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 14:13:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 8726 states and 10995 transitions. [2020-10-13 14:13:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:13:09,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:09,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:09,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 14:13:09,634 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:09,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:09,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1792315409, now seen corresponding path program 1 times [2020-10-13 14:13:09,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:09,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865893579] [2020-10-13 14:13:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:09,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:09,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:09,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:09,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:09,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:13:09,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:13:09,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-13 14:13:09,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:09,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:13:09,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:13:09,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 14:13:09,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:09,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:09,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:09,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:09,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:09,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:09,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:13:09,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:09,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:09,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:09,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:09,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 14:13:09,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865893579] [2020-10-13 14:13:09,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:09,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:13:09,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805870401] [2020-10-13 14:13:09,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:13:09,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:09,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:13:09,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:13:09,916 INFO L87 Difference]: Start difference. First operand 8726 states and 10995 transitions. Second operand 4 states. [2020-10-13 14:13:11,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:11,356 INFO L93 Difference]: Finished difference Result 15890 states and 20053 transitions. [2020-10-13 14:13:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:13:11,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 14:13:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:11,365 INFO L225 Difference]: With dead ends: 15890 [2020-10-13 14:13:11,365 INFO L226 Difference]: Without dead ends: 7212 [2020-10-13 14:13:11,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:13:11,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7212 states. [2020-10-13 14:13:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7212 to 7212. [2020-10-13 14:13:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7212 states. [2020-10-13 14:13:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7212 states to 7212 states and 8986 transitions. [2020-10-13 14:13:12,664 INFO L78 Accepts]: Start accepts. Automaton has 7212 states and 8986 transitions. Word has length 70 [2020-10-13 14:13:12,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:12,664 INFO L479 AbstractCegarLoop]: Abstraction has 7212 states and 8986 transitions. [2020-10-13 14:13:12,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:13:12,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7212 states and 8986 transitions. [2020-10-13 14:13:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:13:12,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:12,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:12,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 14:13:12,665 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:12,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:12,666 INFO L82 PathProgramCache]: Analyzing trace with hash -854382838, now seen corresponding path program 1 times [2020-10-13 14:13:12,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:12,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050909139] [2020-10-13 14:13:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:12,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:12,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:12,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:12,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:13:12,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:13:12,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-13 14:13:12,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:12,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:13:12,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:13:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:13:12,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:12,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:12,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:12,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:12,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:12,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:12,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:13:12,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:12,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:12,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:12,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:12,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:13:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 14:13:12,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050909139] [2020-10-13 14:13:12,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:13:12,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 14:13:12,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042374593] [2020-10-13 14:13:12,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:13:12,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:12,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:13:12,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:13:12,953 INFO L87 Difference]: Start difference. First operand 7212 states and 8986 transitions. Second operand 5 states. [2020-10-13 14:13:13,141 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-13 14:13:15,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:15,121 INFO L93 Difference]: Finished difference Result 14997 states and 18667 transitions. [2020-10-13 14:13:15,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:13:15,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-13 14:13:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:15,130 INFO L225 Difference]: With dead ends: 14997 [2020-10-13 14:13:15,130 INFO L226 Difference]: Without dead ends: 7833 [2020-10-13 14:13:15,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:13:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2020-10-13 14:13:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 7807. [2020-10-13 14:13:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7807 states. [2020-10-13 14:13:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7807 states to 7807 states and 9620 transitions. [2020-10-13 14:13:16,532 INFO L78 Accepts]: Start accepts. Automaton has 7807 states and 9620 transitions. Word has length 71 [2020-10-13 14:13:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:16,532 INFO L479 AbstractCegarLoop]: Abstraction has 7807 states and 9620 transitions. [2020-10-13 14:13:16,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:13:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 7807 states and 9620 transitions. [2020-10-13 14:13:16,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:13:16,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:16,533 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] [2020-10-13 14:13:16,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 14:13:16,533 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:16,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:16,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1146411213, now seen corresponding path program 1 times [2020-10-13 14:13:16,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:16,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539371587] [2020-10-13 14:13:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:16,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:16,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:16,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:13:16,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:16,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-13 14:13:16,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:16,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:13:16,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:13:16,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:13:16,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:16,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:16,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:16,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:16,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:16,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:16,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:13:16,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:16,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:16,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:13:16,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539371587] [2020-10-13 14:13:16,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:13:16,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 14:13:16,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743856443] [2020-10-13 14:13:16,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:13:16,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:16,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:13:16,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:13:16,987 INFO L87 Difference]: Start difference. First operand 7807 states and 9620 transitions. Second operand 10 states. [2020-10-13 14:13:20,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:20,170 INFO L93 Difference]: Finished difference Result 17849 states and 21963 transitions. [2020-10-13 14:13:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 14:13:20,171 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-13 14:13:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:20,180 INFO L225 Difference]: With dead ends: 17849 [2020-10-13 14:13:20,181 INFO L226 Difference]: Without dead ends: 10432 [2020-10-13 14:13:20,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-13 14:13:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10432 states. [2020-10-13 14:13:21,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10432 to 7651. [2020-10-13 14:13:21,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7651 states. [2020-10-13 14:13:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7651 states to 7651 states and 9428 transitions. [2020-10-13 14:13:21,546 INFO L78 Accepts]: Start accepts. Automaton has 7651 states and 9428 transitions. Word has length 71 [2020-10-13 14:13:21,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:21,547 INFO L479 AbstractCegarLoop]: Abstraction has 7651 states and 9428 transitions. [2020-10-13 14:13:21,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:13:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 7651 states and 9428 transitions. [2020-10-13 14:13:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 14:13:21,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:21,551 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:21,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 14:13:21,552 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:21,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2017014151, now seen corresponding path program 1 times [2020-10-13 14:13:21,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:21,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93214190] [2020-10-13 14:13:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:21,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:21,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:21,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:21,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:21,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:21,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:21,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:22,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:23,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:23,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:23,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:23,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:23,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:25,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:25,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:26,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:26,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 14:13:26,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:13:26,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:13:26,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:26,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:13:26,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 14:13:26,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:13:26,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:26,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:26,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:26,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:26,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:26,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:26,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:13:26,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:26,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:26,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:26,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:26,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 14:13:26,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93214190] [2020-10-13 14:13:26,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:26,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:13:26,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292066904] [2020-10-13 14:13:26,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:13:26,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:26,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:13:26,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:13:26,712 INFO L87 Difference]: Start difference. First operand 7651 states and 9428 transitions. Second operand 5 states. [2020-10-13 14:13:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:28,592 INFO L93 Difference]: Finished difference Result 12699 states and 15549 transitions. [2020-10-13 14:13:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:13:28,593 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2020-10-13 14:13:28,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:28,599 INFO L225 Difference]: With dead ends: 12699 [2020-10-13 14:13:28,599 INFO L226 Difference]: Without dead ends: 7561 [2020-10-13 14:13:28,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:13:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7561 states. [2020-10-13 14:13:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7561 to 5053. [2020-10-13 14:13:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5053 states. [2020-10-13 14:13:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 6141 transitions. [2020-10-13 14:13:29,620 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 6141 transitions. Word has length 114 [2020-10-13 14:13:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:29,621 INFO L479 AbstractCegarLoop]: Abstraction has 5053 states and 6141 transitions. [2020-10-13 14:13:29,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:13:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 6141 transitions. [2020-10-13 14:13:29,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 14:13:29,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:29,624 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:29,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 14:13:29,624 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:29,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:29,625 INFO L82 PathProgramCache]: Analyzing trace with hash 548520300, now seen corresponding path program 1 times [2020-10-13 14:13:29,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:29,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983962439] [2020-10-13 14:13:29,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:29,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:29,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:29,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:29,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:29,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:30,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:30,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:30,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:30,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:30,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:30,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:31,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:31,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:31,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:31,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:32,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:34,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:34,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 14:13:34,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:13:34,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:13:34,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:34,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:13:34,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 14:13:34,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 14:13:34,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:34,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:34,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:34,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:34,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:34,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:34,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:13:34,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:34,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:34,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:34,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:34,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 14:13:34,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983962439] [2020-10-13 14:13:34,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:34,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:13:34,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341341620] [2020-10-13 14:13:34,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:13:34,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:34,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:13:34,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:13:34,771 INFO L87 Difference]: Start difference. First operand 5053 states and 6141 transitions. Second operand 5 states. [2020-10-13 14:13:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:36,169 INFO L93 Difference]: Finished difference Result 8033 states and 9961 transitions. [2020-10-13 14:13:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:13:36,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2020-10-13 14:13:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:36,174 INFO L225 Difference]: With dead ends: 8033 [2020-10-13 14:13:36,174 INFO L226 Difference]: Without dead ends: 4660 [2020-10-13 14:13:36,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:13:36,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2020-10-13 14:13:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 3326. [2020-10-13 14:13:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3326 states. [2020-10-13 14:13:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 3984 transitions. [2020-10-13 14:13:36,917 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 3984 transitions. Word has length 114 [2020-10-13 14:13:36,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:36,917 INFO L479 AbstractCegarLoop]: Abstraction has 3326 states and 3984 transitions. [2020-10-13 14:13:36,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:13:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 3984 transitions. [2020-10-13 14:13:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 14:13:36,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:36,920 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:36,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 14:13:36,920 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:36,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2087225583, now seen corresponding path program 1 times [2020-10-13 14:13:36,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:36,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981592013] [2020-10-13 14:13:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:36,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:36,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:36,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:38,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:38,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:39,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:39,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:39,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:39,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:40,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:41,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:41,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:41,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:41,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:41,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:41,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:41,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 14:13:41,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 14:13:41,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:13:41,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:41,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:13:41,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 14:13:41,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 14:13:41,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:42,312 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2020-10-13 14:13:42,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:42,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:42,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:42,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:42,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:42,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:13:42,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:42,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:42,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:42,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:42,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 48 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:13:42,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981592013] [2020-10-13 14:13:42,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:13:42,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:13:42,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214436630] [2020-10-13 14:13:42,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:13:42,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:42,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:13:42,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:13:42,560 INFO L87 Difference]: Start difference. First operand 3326 states and 3984 transitions. Second operand 12 states. [2020-10-13 14:13:42,800 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:13:43,315 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-13 14:13:43,549 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-13 14:13:43,775 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-13 14:13:44,038 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-13 14:13:44,354 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-13 14:13:44,582 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-13 14:13:44,889 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-13 14:13:45,126 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-13 14:13:45,532 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-13 14:13:45,806 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-13 14:13:46,028 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-13 14:13:47,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:47,244 INFO L93 Difference]: Finished difference Result 5840 states and 6989 transitions. [2020-10-13 14:13:47,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 14:13:47,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 114 [2020-10-13 14:13:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:47,249 INFO L225 Difference]: With dead ends: 5840 [2020-10-13 14:13:47,250 INFO L226 Difference]: Without dead ends: 4122 [2020-10-13 14:13:47,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2020-10-13 14:13:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2020-10-13 14:13:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3326. [2020-10-13 14:13:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3326 states. [2020-10-13 14:13:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 3960 transitions. [2020-10-13 14:13:48,138 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 3960 transitions. Word has length 114 [2020-10-13 14:13:48,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:48,138 INFO L479 AbstractCegarLoop]: Abstraction has 3326 states and 3960 transitions. [2020-10-13 14:13:48,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:13:48,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 3960 transitions. [2020-10-13 14:13:48,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 14:13:48,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:48,140 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:48,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 14:13:48,140 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:48,140 INFO L82 PathProgramCache]: Analyzing trace with hash -750626409, now seen corresponding path program 1 times [2020-10-13 14:13:48,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:48,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819845540] [2020-10-13 14:13:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:48,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:48,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:48,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:48,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:48,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:51,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:51,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:51,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:51,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:51,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:52,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:53,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:53,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 14:13:53,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:13:53,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:13:53,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:53,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 14:13:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 14:13:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 14:13:53,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:53,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:53,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:53,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:53,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:53,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:53,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:13:53,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:53,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:53,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:53,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:53,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:13:53,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819845540] [2020-10-13 14:13:53,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:13:53,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 14:13:53,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421961549] [2020-10-13 14:13:53,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 14:13:53,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:53,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 14:13:53,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-13 14:13:53,705 INFO L87 Difference]: Start difference. First operand 3326 states and 3960 transitions. Second operand 17 states. [2020-10-13 14:13:54,090 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2020-10-13 14:13:57,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:57,768 INFO L93 Difference]: Finished difference Result 6246 states and 7459 transitions. [2020-10-13 14:13:57,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:13:57,769 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 114 [2020-10-13 14:13:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:57,773 INFO L225 Difference]: With dead ends: 6246 [2020-10-13 14:13:57,774 INFO L226 Difference]: Without dead ends: 5422 [2020-10-13 14:13:57,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 14:13:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5422 states.