/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/array-examples/standard_seq_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:58:31,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:58:31,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:58:31,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:58:31,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:58:31,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:58:31,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:58:31,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:58:31,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:58:31,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:58:31,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:58:31,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:58:31,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:58:31,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:58:31,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:58:31,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:58:31,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:58:31,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:58:31,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:58:31,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:58:31,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:58:31,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:58:31,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:58:31,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:58:31,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:58:31,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:58:31,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:58:31,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:58:31,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:58:31,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:58:31,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:58:31,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:58:31,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:58:31,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:58:31,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:58:31,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:58:31,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:58:31,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:58:31,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:58:31,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:58:31,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:58:31,489 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 04:58:31,530 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:58:31,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:58:31,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:58:31,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:58:31,533 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:58:31,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:58:31,533 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:58:31,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:58:31,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:58:31,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:58:31,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:58:31,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:58:31,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:58:31,535 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:58:31,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:58:31,536 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:58:31,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:58:31,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:58:31,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:58:31,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:58:31,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:58:31,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:58:31,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:58:31,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:58:31,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:58:31,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:58:31,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:58:31,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:58:31,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:58:31,539 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 04:58:31,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:58:31,839 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:58:31,842 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:58:31,843 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:58:31,844 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:58:31,845 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_seq_init_ground.i [2020-10-13 04:58:31,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51084de45/57c03eb64a5948e3ba5a46b3d8b34853/FLAG64932d330 [2020-10-13 04:58:32,329 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:58:32,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_seq_init_ground.i [2020-10-13 04:58:32,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51084de45/57c03eb64a5948e3ba5a46b3d8b34853/FLAG64932d330 [2020-10-13 04:58:32,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51084de45/57c03eb64a5948e3ba5a46b3d8b34853 [2020-10-13 04:58:32,755 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:58:32,757 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:58:32,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:58:32,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:58:32,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:58:32,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:58:32" (1/1) ... [2020-10-13 04:58:32,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@702e2c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:32, skipping insertion in model container [2020-10-13 04:58:32,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:58:32" (1/1) ... [2020-10-13 04:58:32,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:58:32,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:58:32,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:58:32,995 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:58:33,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:58:33,029 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:58:33,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:33 WrapperNode [2020-10-13 04:58:33,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:58:33,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:58:33,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:58:33,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:58:33,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:33" (1/1) ... [2020-10-13 04:58:33,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:33" (1/1) ... [2020-10-13 04:58:33,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:33" (1/1) ... [2020-10-13 04:58:33,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:33" (1/1) ... [2020-10-13 04:58:33,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:33" (1/1) ... [2020-10-13 04:58:33,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:33" (1/1) ... [2020-10-13 04:58:33,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:33" (1/1) ... [2020-10-13 04:58:33,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:58:33,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:58:33,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:58:33,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:58:33,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:33" (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 04:58:33,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:58:33,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:58:33,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:58:33,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:58:33,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:58:33,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:58:33,210 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:58:33,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:58:33,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:58:33,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:58:33,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:58:33,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:58:33,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:58:33,414 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:58:33,414 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 04:58:33,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:58:33 BoogieIcfgContainer [2020-10-13 04:58:33,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:58:33,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:58:33,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:58:33,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:58:33,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:58:32" (1/3) ... [2020-10-13 04:58:33,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dadd1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:58:33, skipping insertion in model container [2020-10-13 04:58:33,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:33" (2/3) ... [2020-10-13 04:58:33,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dadd1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:58:33, skipping insertion in model container [2020-10-13 04:58:33,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:58:33" (3/3) ... [2020-10-13 04:58:33,426 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_seq_init_ground.i [2020-10-13 04:58:33,437 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:58:33,444 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:58:33,459 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:58:33,513 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:58:33,513 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:58:33,513 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:58:33,514 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:58:33,514 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:58:33,514 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:58:33,514 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:58:33,514 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:58:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-13 04:58:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 04:58:33,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:33,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:33,550 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:33,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:33,562 INFO L82 PathProgramCache]: Analyzing trace with hash -441053002, now seen corresponding path program 1 times [2020-10-13 04:58:33,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:33,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319311665] [2020-10-13 04:58:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:33,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:33,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:33,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 04:58:33,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:33,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-13 04:58:33,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:33,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:33,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:58:33,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:33,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:58:33,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:33,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:33,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:33,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:33,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:33,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 04:58:33,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:33,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:33,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:33,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:33,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:58:33,888 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 04:58:33,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319311665] [2020-10-13 04:58:33,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:58:33,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:58:33,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014082705] [2020-10-13 04:58:33,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:58:33,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:33,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:58:33,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:58:33,920 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-13 04:58:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:34,017 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-13 04:58:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:58:34,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 04:58:34,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:34,027 INFO L225 Difference]: With dead ends: 39 [2020-10-13 04:58:34,028 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 04:58:34,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:58:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 04:58:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-13 04:58:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 04:58:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-13 04:58:34,069 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-10-13 04:58:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:34,069 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-13 04:58:34,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:58:34,070 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-13 04:58:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 04:58:34,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:34,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:34,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:58:34,071 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:34,072 INFO L82 PathProgramCache]: Analyzing trace with hash 303899570, now seen corresponding path program 1 times [2020-10-13 04:58:34,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:34,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507106779] [2020-10-13 04:58:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:34,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:34,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:34,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 04:58:34,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:34,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-13 04:58:34,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:34,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:58:34,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:34,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:58:34,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:34,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:34,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:34,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:34,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:34,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:34,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:58:34,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:34,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:34,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:34,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:34,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:34,292 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 04:58:34,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507106779] [2020-10-13 04:58:34,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:58:34,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:58:34,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780677853] [2020-10-13 04:58:34,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:58:34,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:34,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:58:34,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:58:34,296 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-10-13 04:58:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:34,346 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-13 04:58:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:58:34,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 04:58:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:34,348 INFO L225 Difference]: With dead ends: 30 [2020-10-13 04:58:34,348 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 04:58:34,349 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 04:58:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 04:58:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 04:58:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 04:58:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-13 04:58:34,356 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2020-10-13 04:58:34,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:34,356 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-13 04:58:34,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:58:34,356 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-13 04:58:34,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 04:58:34,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:34,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:34,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:58:34,358 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:34,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:34,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1260126610, now seen corresponding path program 1 times [2020-10-13 04:58:34,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:34,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289254434] [2020-10-13 04:58:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:34,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:34,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:34,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:34,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 04:58:34,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:34,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-13 04:58:34,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:58:34,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:34,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:58:34,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:58:34,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:34,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:34,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:34,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:34,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:34,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:58:34,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:34,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:34,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:34,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:34,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:34,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289254434] [2020-10-13 04:58:34,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:34,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:58:34,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492035372] [2020-10-13 04:58:34,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:58:34,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:34,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:58:34,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:58:34,719 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-13 04:58:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:34,795 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-13 04:58:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:58:34,795 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 04:58:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:34,796 INFO L225 Difference]: With dead ends: 31 [2020-10-13 04:58:34,797 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 04:58:34,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:58:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 04:58:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 04:58:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 04:58:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 04:58:34,805 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2020-10-13 04:58:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:34,805 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 04:58:34,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:58:34,805 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 04:58:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:58:34,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:34,806 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:34,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:58:34,807 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:34,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1794669362, now seen corresponding path program 2 times [2020-10-13 04:58:34,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:34,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217064328] [2020-10-13 04:58:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:34,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:34,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:35,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:35,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:58:35,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:35,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-13 04:58:35,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:35,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:58:35,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:35,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:58:35,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:35,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:35,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:35,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:35,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:35,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:35,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:58:35,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:35,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:35,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:35,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:35,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:35,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217064328] [2020-10-13 04:58:35,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:35,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:58:35,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965760576] [2020-10-13 04:58:35,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:58:35,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:35,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:58:35,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:58:35,180 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-13 04:58:35,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:35,255 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-13 04:58:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:58:35,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-13 04:58:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:35,257 INFO L225 Difference]: With dead ends: 32 [2020-10-13 04:58:35,257 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 04:58:35,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:58:35,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 04:58:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 04:58:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 04:58:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-13 04:58:35,268 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2020-10-13 04:58:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:35,269 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-13 04:58:35,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:58:35,270 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-13 04:58:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:58:35,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:35,271 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:35,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:58:35,271 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:35,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:35,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2004063982, now seen corresponding path program 3 times [2020-10-13 04:58:35,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:35,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360090958] [2020-10-13 04:58:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:35,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:35,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:35,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:35,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:58:35,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:35,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-13 04:58:35,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:58:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:58:35,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:35,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:35,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:35,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:35,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:35,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:35,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:58:35,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:35,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:35,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:35,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:35,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:35,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360090958] [2020-10-13 04:58:35,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:35,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:58:35,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678262335] [2020-10-13 04:58:35,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:58:35,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:35,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:58:35,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:58:35,545 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-13 04:58:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:35,626 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-13 04:58:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:58:35,627 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-13 04:58:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:35,628 INFO L225 Difference]: With dead ends: 33 [2020-10-13 04:58:35,628 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 04:58:35,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:58:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 04:58:35,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 04:58:35,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 04:58:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-13 04:58:35,642 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-10-13 04:58:35,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:35,647 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-13 04:58:35,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:58:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-13 04:58:35,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:58:35,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:35,649 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:35,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:58:35,650 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:35,650 INFO L82 PathProgramCache]: Analyzing trace with hash -94637390, now seen corresponding path program 4 times [2020-10-13 04:58:35,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:35,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370730524] [2020-10-13 04:58:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:35,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:35,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:35,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:35,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:58:35,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:35,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-13 04:58:35,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:35,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:58:35,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:35,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:58:35,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:36,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:36,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:36,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:36,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:36,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:58:36,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:36,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:36,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:36,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:36,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:36,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370730524] [2020-10-13 04:58:36,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:36,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:58:36,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164303093] [2020-10-13 04:58:36,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:58:36,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:36,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:58:36,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:58:36,027 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-10-13 04:58:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:36,090 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-13 04:58:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:58:36,091 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-13 04:58:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:36,091 INFO L225 Difference]: With dead ends: 34 [2020-10-13 04:58:36,091 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 04:58:36,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:58:36,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 04:58:36,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 04:58:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 04:58:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-13 04:58:36,102 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2020-10-13 04:58:36,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:36,103 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-13 04:58:36,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:58:36,103 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-13 04:58:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 04:58:36,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:36,107 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:36,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:58:36,108 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:36,108 INFO L82 PathProgramCache]: Analyzing trace with hash -729870482, now seen corresponding path program 5 times [2020-10-13 04:58:36,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:36,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398770823] [2020-10-13 04:58:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:36,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:36,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 04:58:36,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:36,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-13 04:58:36,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:36,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:58:36,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:36,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:58:36,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:36,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:36,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:36,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:36,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:36,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:36,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:36,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:36,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:36,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:36,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:36,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398770823] [2020-10-13 04:58:36,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:36,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:58:36,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464974484] [2020-10-13 04:58:36,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:58:36,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:36,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:58:36,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:58:36,539 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2020-10-13 04:58:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:36,631 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-13 04:58:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:58:36,632 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-13 04:58:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:36,633 INFO L225 Difference]: With dead ends: 35 [2020-10-13 04:58:36,634 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 04:58:36,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:58:36,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 04:58:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 04:58:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 04:58:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-13 04:58:36,643 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2020-10-13 04:58:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:36,643 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-13 04:58:36,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:58:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-13 04:58:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:58:36,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:36,646 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:36,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:58:36,646 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:36,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1052740146, now seen corresponding path program 6 times [2020-10-13 04:58:36,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:36,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579889966] [2020-10-13 04:58:36,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:36,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:36,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:58:36,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-13 04:58:36,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:58:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:36,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:58:36,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:36,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:36,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:36,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:36,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:36,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:58:36,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:36,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:36,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:36,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:36,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:36,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579889966] [2020-10-13 04:58:36,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:36,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:58:36,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118906406] [2020-10-13 04:58:36,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:58:36,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:36,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:58:36,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:58:36,976 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-10-13 04:58:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:37,028 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-13 04:58:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:58:37,028 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-13 04:58:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:37,029 INFO L225 Difference]: With dead ends: 36 [2020-10-13 04:58:37,029 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 04:58:37,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:58:37,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 04:58:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 04:58:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 04:58:37,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-13 04:58:37,035 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2020-10-13 04:58:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:37,036 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-13 04:58:37,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:58:37,036 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-13 04:58:37,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:58:37,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:37,037 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:37,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:58:37,039 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:37,039 INFO L82 PathProgramCache]: Analyzing trace with hash 479094766, now seen corresponding path program 7 times [2020-10-13 04:58:37,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:37,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239652147] [2020-10-13 04:58:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:37,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:37,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:37,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:37,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:58:37,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:37,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-13 04:58:37,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:37,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:58:37,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:37,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 04:58:37,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:37,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:37,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:37,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:37,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:37,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:37,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:37,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:37,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:37,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:37,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:37,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:37,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239652147] [2020-10-13 04:58:37,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:37,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:58:37,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560340000] [2020-10-13 04:58:37,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:58:37,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:37,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:58:37,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:58:37,741 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2020-10-13 04:58:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:37,849 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-13 04:58:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:58:37,850 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-13 04:58:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:37,851 INFO L225 Difference]: With dead ends: 37 [2020-10-13 04:58:37,851 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 04:58:37,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:58:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 04:58:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 04:58:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 04:58:37,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-13 04:58:37,863 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2020-10-13 04:58:37,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:37,864 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-13 04:58:37,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:58:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-13 04:58:37,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 04:58:37,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:37,866 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:37,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:58:37,867 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:37,867 INFO L82 PathProgramCache]: Analyzing trace with hash -124042830, now seen corresponding path program 8 times [2020-10-13 04:58:37,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:37,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031542471] [2020-10-13 04:58:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:37,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:38,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:38,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:38,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 04:58:38,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:38,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-13 04:58:38,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:38,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:58:38,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:38,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:58:38,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:38,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:38,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:38,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:38,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:38,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:38,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:58:38,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:38,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:38,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:38,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:38,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:38,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031542471] [2020-10-13 04:58:38,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:38,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:58:38,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817409508] [2020-10-13 04:58:38,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:58:38,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:38,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:58:38,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:58:38,542 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2020-10-13 04:58:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:38,652 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-13 04:58:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:58:38,653 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-13 04:58:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:38,655 INFO L225 Difference]: With dead ends: 38 [2020-10-13 04:58:38,655 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 04:58:38,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:58:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 04:58:38,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 04:58:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:58:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-13 04:58:38,660 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-10-13 04:58:38,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:38,661 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-13 04:58:38,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:58:38,661 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-13 04:58:38,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:58:38,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:38,662 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:38,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:58:38,662 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:38,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:38,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1641439122, now seen corresponding path program 9 times [2020-10-13 04:58:38,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:38,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186480566] [2020-10-13 04:58:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:38,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:39,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:39,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:39,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:58:39,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:39,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-13 04:58:39,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:39,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:58:39,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:39,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:58:39,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:39,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:39,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:39,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:39,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:39,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:39,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:39,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:39,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:39,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:39,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:39,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:39,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186480566] [2020-10-13 04:58:39,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:39,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:58:39,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752912695] [2020-10-13 04:58:39,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:58:39,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:39,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:58:39,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:58:39,286 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-10-13 04:58:39,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:39,347 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-13 04:58:39,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:58:39,348 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-13 04:58:39,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:39,349 INFO L225 Difference]: With dead ends: 39 [2020-10-13 04:58:39,349 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:58:39,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:58:39,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:58:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 04:58:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:58:39,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-13 04:58:39,354 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2020-10-13 04:58:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:39,355 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-13 04:58:39,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:58:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-13 04:58:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:58:39,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:39,356 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:39,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:58:39,356 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:39,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1436083918, now seen corresponding path program 10 times [2020-10-13 04:58:39,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:39,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805508690] [2020-10-13 04:58:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:39,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:39,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:39,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:39,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:58:39,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:39,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-13 04:58:39,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:39,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:58:39,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:39,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:58:39,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:40,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:40,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:40,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:40,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:40,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:40,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:40,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:40,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:40,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:40,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:40,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:40,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805508690] [2020-10-13 04:58:40,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:40,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:58:40,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106574561] [2020-10-13 04:58:40,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:58:40,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:40,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:58:40,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:58:40,168 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-10-13 04:58:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:40,293 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-13 04:58:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:58:40,294 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-13 04:58:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:40,295 INFO L225 Difference]: With dead ends: 40 [2020-10-13 04:58:40,295 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 04:58:40,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:58:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 04:58:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 04:58:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 04:58:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-13 04:58:40,301 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2020-10-13 04:58:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:40,301 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-13 04:58:40,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:58:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-13 04:58:40,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:58:40,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:40,303 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:40,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:58:40,303 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:40,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:40,304 INFO L82 PathProgramCache]: Analyzing trace with hash 634960110, now seen corresponding path program 11 times [2020-10-13 04:58:40,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:40,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021744785] [2020-10-13 04:58:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:40,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:40,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:41,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:41,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:58:41,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:41,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 959 [2020-10-13 04:58:41,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:41,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:58:41,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:41,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 04:58:41,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:41,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:41,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:41,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:41,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:41,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:41,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:41,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:41,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:41,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:41,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:41,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:41,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021744785] [2020-10-13 04:58:41,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:41,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:58:41,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620253252] [2020-10-13 04:58:41,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:58:41,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:58:41,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:58:41,445 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2020-10-13 04:58:41,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:41,539 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-13 04:58:41,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:58:41,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-13 04:58:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:41,541 INFO L225 Difference]: With dead ends: 41 [2020-10-13 04:58:41,541 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 04:58:41,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:58:41,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 04:58:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 04:58:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 04:58:41,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-13 04:58:41,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2020-10-13 04:58:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:41,546 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-13 04:58:41,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:58:41,546 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-13 04:58:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:58:41,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:41,547 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:41,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:58:41,548 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:41,548 INFO L82 PathProgramCache]: Analyzing trace with hash 412815538, now seen corresponding path program 12 times [2020-10-13 04:58:41,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:41,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728108190] [2020-10-13 04:58:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:41,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:41,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:42,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:42,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:58:42,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:42,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-13 04:58:42,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:58:42,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:42,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:58:42,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:42,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:42,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:42,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:42,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:42,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:42,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:42,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:42,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:42,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:42,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:42,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:42,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728108190] [2020-10-13 04:58:42,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:42,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:58:42,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868296225] [2020-10-13 04:58:42,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:58:42,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:42,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:58:42,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:58:42,393 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 16 states. [2020-10-13 04:58:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:42,461 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-13 04:58:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:58:42,461 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-13 04:58:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:42,462 INFO L225 Difference]: With dead ends: 42 [2020-10-13 04:58:42,462 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 04:58:42,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:58:42,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 04:58:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 04:58:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 04:58:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-13 04:58:42,467 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2020-10-13 04:58:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:42,468 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-13 04:58:42,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:58:42,468 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-13 04:58:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 04:58:42,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:42,469 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:42,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:58:42,469 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:42,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2116268398, now seen corresponding path program 13 times [2020-10-13 04:58:42,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:42,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728304673] [2020-10-13 04:58:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:42,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:42,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:43,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:43,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 04:58:43,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:43,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 800 [2020-10-13 04:58:43,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:43,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:58:43,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:43,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 04:58:43,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:43,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:43,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:43,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:43,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:43,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:43,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:43,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:43,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:43,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:43,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:43,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728304673] [2020-10-13 04:58:43,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:43,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:58:43,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421915275] [2020-10-13 04:58:43,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:58:43,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:43,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:58:43,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:58:43,465 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 17 states. [2020-10-13 04:58:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:43,562 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-13 04:58:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:58:43,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-13 04:58:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:43,564 INFO L225 Difference]: With dead ends: 43 [2020-10-13 04:58:43,564 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 04:58:43,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:58:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 04:58:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 04:58:43,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:58:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-13 04:58:43,568 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2020-10-13 04:58:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:43,569 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-13 04:58:43,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:58:43,569 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-13 04:58:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:58:43,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:43,570 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:43,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:58:43,570 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:43,570 INFO L82 PathProgramCache]: Analyzing trace with hash -911267790, now seen corresponding path program 14 times [2020-10-13 04:58:43,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:43,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14999466] [2020-10-13 04:58:43,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:43,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:43,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:44,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:44,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:58:44,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:44,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1125 [2020-10-13 04:58:44,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:44,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:58:44,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:44,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:58:44,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:44,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:44,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:44,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:44,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:44,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:44,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:44,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:44,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:44,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:44,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:44,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:44,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14999466] [2020-10-13 04:58:44,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:44,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:58:44,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998693829] [2020-10-13 04:58:44,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:58:44,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:44,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:58:44,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:58:44,986 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 18 states. [2020-10-13 04:58:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:45,137 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-13 04:58:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:58:45,137 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-13 04:58:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:45,139 INFO L225 Difference]: With dead ends: 44 [2020-10-13 04:58:45,139 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 04:58:45,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:58:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 04:58:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-13 04:58:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 04:58:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-13 04:58:45,144 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2020-10-13 04:58:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:45,144 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-13 04:58:45,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:58:45,145 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-13 04:58:45,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:58:45,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:45,146 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:45,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:58:45,146 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:45,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:45,147 INFO L82 PathProgramCache]: Analyzing trace with hash -275609106, now seen corresponding path program 15 times [2020-10-13 04:58:45,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:45,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131534732] [2020-10-13 04:58:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:45,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:45,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:46,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:46,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:58:46,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:46,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 860 [2020-10-13 04:58:46,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:58:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:58:46,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:46,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:46,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:46,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:46,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:46,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:46,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:46,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:46,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:46,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:46,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:46,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131534732] [2020-10-13 04:58:46,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:46,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:58:46,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679561226] [2020-10-13 04:58:46,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:58:46,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:46,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:58:46,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:58:46,376 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-10-13 04:58:46,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:46,539 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-13 04:58:46,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:58:46,540 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-13 04:58:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:46,541 INFO L225 Difference]: With dead ends: 45 [2020-10-13 04:58:46,541 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 04:58:46,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:58:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 04:58:46,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 04:58:46,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 04:58:46,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-13 04:58:46,552 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2020-10-13 04:58:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:46,553 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-13 04:58:46,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:58:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-13 04:58:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:58:46,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:46,557 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:46,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:58:46,558 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2045026382, now seen corresponding path program 16 times [2020-10-13 04:58:46,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:46,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284339322] [2020-10-13 04:58:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:46,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:47,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:48,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:48,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:58:48,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:48,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1465 [2020-10-13 04:58:48,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:58:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:58:48,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:48,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:48,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:48,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:48,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:48,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:48,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:48,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:48,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:48,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:48,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:48,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:48,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284339322] [2020-10-13 04:58:48,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:48,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:58:48,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807140451] [2020-10-13 04:58:48,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:58:48,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:48,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:58:48,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:58:48,302 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 20 states. [2020-10-13 04:58:48,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:48,409 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-13 04:58:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:58:48,409 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-13 04:58:48,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:48,410 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:58:48,410 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:58:48,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:58:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:58:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 04:58:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 04:58:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-13 04:58:48,420 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2020-10-13 04:58:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:48,420 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-13 04:58:48,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:58:48,421 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-13 04:58:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:58:48,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:48,421 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:48,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:58:48,422 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:48,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:48,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1062387090, now seen corresponding path program 17 times [2020-10-13 04:58:48,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:48,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406308231] [2020-10-13 04:58:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:48,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:49,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:49,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:49,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:58:49,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:49,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1081 [2020-10-13 04:58:49,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:58:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 04:58:49,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:49,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:49,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:49,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:49,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:49,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:49,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:49,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:49,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:49,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:49,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:49,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:49,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406308231] [2020-10-13 04:58:49,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:49,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:58:49,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260608453] [2020-10-13 04:58:49,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:58:49,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:49,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:58:49,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:58:49,775 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 21 states. [2020-10-13 04:58:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:49,856 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-13 04:58:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:58:49,856 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-13 04:58:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:49,857 INFO L225 Difference]: With dead ends: 47 [2020-10-13 04:58:49,857 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 04:58:49,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:58:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 04:58:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-13 04:58:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 04:58:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-13 04:58:49,869 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2020-10-13 04:58:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:49,869 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-13 04:58:49,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:58:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-13 04:58:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:58:49,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:49,870 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:49,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:58:49,871 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:49,871 INFO L82 PathProgramCache]: Analyzing trace with hash -665340110, now seen corresponding path program 18 times [2020-10-13 04:58:49,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:49,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546910532] [2020-10-13 04:58:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:49,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:50,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:51,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:51,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 04:58:51,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:51,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1307 [2020-10-13 04:58:51,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:51,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:58:51,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:51,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:58:51,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:51,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:51,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:51,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:51,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:51,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:51,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:51,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:51,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:51,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:51,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:51,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:51,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546910532] [2020-10-13 04:58:51,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:51,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:58:51,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038734713] [2020-10-13 04:58:51,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:58:51,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:51,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:58:51,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:58:51,507 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 22 states. [2020-10-13 04:58:51,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:51,606 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-13 04:58:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:58:51,607 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-13 04:58:51,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:51,608 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:58:51,608 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 04:58:51,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:58:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 04:58:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 04:58:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 04:58:51,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-13 04:58:51,613 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-10-13 04:58:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:51,613 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-13 04:58:51,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:58:51,614 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-13 04:58:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:58:51,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:51,614 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:51,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:58:51,615 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1241785618, now seen corresponding path program 19 times [2020-10-13 04:58:51,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:51,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616865698] [2020-10-13 04:58:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:51,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:53,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:53,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:58:53,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:53,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1493 [2020-10-13 04:58:53,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:53,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:58:53,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:53,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 04:58:53,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:53,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:53,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:53,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:53,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:53,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:53,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:53,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:53,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:53,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:53,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:53,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:53,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616865698] [2020-10-13 04:58:53,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:53,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:58:53,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122685971] [2020-10-13 04:58:53,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:58:53,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:53,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:58:53,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:58:53,454 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 23 states. [2020-10-13 04:58:53,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:53,581 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-13 04:58:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:58:53,582 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-13 04:58:53,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:53,583 INFO L225 Difference]: With dead ends: 49 [2020-10-13 04:58:53,583 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 04:58:53,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:58:53,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 04:58:53,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 04:58:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 04:58:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-13 04:58:53,588 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2020-10-13 04:58:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:53,589 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-13 04:58:53,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:58:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-13 04:58:53,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 04:58:53,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:53,591 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:53,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:58:53,591 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:53,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:53,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1931727182, now seen corresponding path program 20 times [2020-10-13 04:58:53,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:53,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101953122] [2020-10-13 04:58:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:53,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:54,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:54,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:54,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 04:58:54,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:54,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-13 04:58:54,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:54,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:58:54,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:54,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:58:54,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:55,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:55,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:55,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:55,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:55,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:55,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:55,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:55,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:55,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:55,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:55,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:55,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101953122] [2020-10-13 04:58:55,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:55,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:58:55,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575461111] [2020-10-13 04:58:55,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:58:55,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:55,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:58:55,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:58:55,120 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 24 states. [2020-10-13 04:58:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:55,241 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-13 04:58:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:58:55,243 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-13 04:58:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:55,244 INFO L225 Difference]: With dead ends: 50 [2020-10-13 04:58:55,244 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 04:58:55,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:58:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 04:58:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 04:58:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 04:58:55,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-13 04:58:55,250 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2020-10-13 04:58:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:55,250 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-13 04:58:55,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:58:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-13 04:58:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:58:55,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:55,251 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:55,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:58:55,253 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:55,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:55,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1845079186, now seen corresponding path program 21 times [2020-10-13 04:58:55,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:55,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069685652] [2020-10-13 04:58:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:55,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:55,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:57,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:57,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:58:57,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:57,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1992 [2020-10-13 04:58:57,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:57,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:58:57,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:57,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:58:57,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:57,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:57,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:57,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:57,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:57,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:57,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:57,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:57,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:57,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:57,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:57,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:57,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069685652] [2020-10-13 04:58:57,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:57,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:58:57,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917460162] [2020-10-13 04:58:57,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:58:57,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:57,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:58:57,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:58:57,620 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 25 states. [2020-10-13 04:58:57,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:57,724 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-13 04:58:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:58:57,724 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-10-13 04:58:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:57,725 INFO L225 Difference]: With dead ends: 51 [2020-10-13 04:58:57,725 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:58:57,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:58:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:58:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 04:58:57,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:58:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-13 04:58:57,730 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2020-10-13 04:58:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:57,730 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-13 04:58:57,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:58:57,730 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-13 04:58:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:58:57,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:57,731 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:57,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:58:57,731 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:57,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:57,732 INFO L82 PathProgramCache]: Analyzing trace with hash 841008690, now seen corresponding path program 22 times [2020-10-13 04:58:57,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:57,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378969789] [2020-10-13 04:58:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:57,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:58,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:59,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:59,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:58:59,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:59,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1867 [2020-10-13 04:58:59,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:59,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:58:59,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:59,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:58:59,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:59,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:59,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:59,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:59,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:59,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:59,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:59,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:59,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:59,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:59,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:59,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:59,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378969789] [2020-10-13 04:58:59,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:59,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:58:59,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680277525] [2020-10-13 04:58:59,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:58:59,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:58:59,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:58:59,989 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 26 states. [2020-10-13 04:59:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:00,110 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-13 04:59:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:59:00,110 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 35 [2020-10-13 04:59:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:00,110 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:59:00,111 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:59:00,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:59:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:59:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 04:59:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:59:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-13 04:59:00,115 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2020-10-13 04:59:00,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:00,116 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-13 04:59:00,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:59:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-13 04:59:00,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 04:59:00,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:00,116 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:00,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:59:00,117 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1789613074, now seen corresponding path program 23 times [2020-10-13 04:59:00,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:00,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951153377] [2020-10-13 04:59:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:00,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:00,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:01,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:01,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 04:59:01,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:01,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1680 [2020-10-13 04:59:01,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:01,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:59:01,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:01,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 04:59:01,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:02,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:02,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:02,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:02,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:02,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:02,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:02,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:02,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:02,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:02,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:02,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:02,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951153377] [2020-10-13 04:59:02,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:02,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:59:02,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894555933] [2020-10-13 04:59:02,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:59:02,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:02,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:59:02,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:59:02,196 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 27 states. [2020-10-13 04:59:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:02,357 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-13 04:59:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:59:02,358 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 36 [2020-10-13 04:59:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:02,359 INFO L225 Difference]: With dead ends: 53 [2020-10-13 04:59:02,359 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 04:59:02,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:59:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 04:59:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-13 04:59:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:59:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-13 04:59:02,363 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2020-10-13 04:59:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:02,363 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-13 04:59:02,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:59:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-13 04:59:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:59:02,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:02,364 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:02,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:59:02,364 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:02,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1734509134, now seen corresponding path program 24 times [2020-10-13 04:59:02,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:02,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258128253] [2020-10-13 04:59:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:02,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:03,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:04,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:04,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:59:04,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:04,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2366 [2020-10-13 04:59:04,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:04,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:59:04,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:04,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:59:04,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:05,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:05,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:05,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:05,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:05,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:05,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:05,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:05,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:05,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:05,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:05,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:05,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258128253] [2020-10-13 04:59:05,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:05,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:59:05,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344895719] [2020-10-13 04:59:05,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:59:05,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:05,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:59:05,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:59:05,162 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 28 states. [2020-10-13 04:59:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:05,333 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-13 04:59:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:59:05,334 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 37 [2020-10-13 04:59:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:05,334 INFO L225 Difference]: With dead ends: 54 [2020-10-13 04:59:05,334 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 04:59:05,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:59:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 04:59:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 04:59:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 04:59:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-13 04:59:05,339 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2020-10-13 04:59:05,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:05,340 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-13 04:59:05,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:59:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-13 04:59:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 04:59:05,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:05,346 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:05,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:59:05,346 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash -26286994, now seen corresponding path program 25 times [2020-10-13 04:59:05,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:05,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176236117] [2020-10-13 04:59:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:05,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:06,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:07,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:07,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 04:59:07,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:07,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1803 [2020-10-13 04:59:07,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:07,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:59:07,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:07,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 04:59:07,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:07,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:07,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:07,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:07,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:07,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:07,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:07,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:07,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:07,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176236117] [2020-10-13 04:59:07,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:07,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:59:07,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098369656] [2020-10-13 04:59:07,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:59:07,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:07,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:59:07,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:59:07,598 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 29 states. [2020-10-13 04:59:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:07,759 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-13 04:59:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:59:07,760 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2020-10-13 04:59:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:07,761 INFO L225 Difference]: With dead ends: 55 [2020-10-13 04:59:07,761 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 04:59:07,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:59:07,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 04:59:07,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 04:59:07,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:59:07,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-13 04:59:07,766 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2020-10-13 04:59:07,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:07,767 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-13 04:59:07,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:59:07,767 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-13 04:59:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:59:07,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:07,767 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:07,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:59:07,768 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:07,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1388991794, now seen corresponding path program 26 times [2020-10-13 04:59:07,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:07,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59470493] [2020-10-13 04:59:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:07,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:08,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:09,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:09,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:59:09,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:09,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1577 [2020-10-13 04:59:09,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:09,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:59:09,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:09,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:59:09,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:09,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:09,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:09,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:09,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:09,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:09,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:09,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:09,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:09,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:09,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:09,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:09,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59470493] [2020-10-13 04:59:09,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:09,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:59:09,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15861173] [2020-10-13 04:59:09,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:59:09,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:09,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:59:09,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:59:09,840 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 30 states. [2020-10-13 04:59:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:10,012 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-13 04:59:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:59:10,013 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 39 [2020-10-13 04:59:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:10,013 INFO L225 Difference]: With dead ends: 56 [2020-10-13 04:59:10,014 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 04:59:10,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:59:10,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 04:59:10,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-13 04:59:10,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 04:59:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-13 04:59:10,019 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2020-10-13 04:59:10,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:10,019 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-13 04:59:10,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:59:10,019 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-13 04:59:10,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 04:59:10,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:10,020 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:10,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:59:10,020 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:10,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:10,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1982006034, now seen corresponding path program 27 times [2020-10-13 04:59:10,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:10,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427987161] [2020-10-13 04:59:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:10,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:11,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:11,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:11,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 04:59:11,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:11,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1593 [2020-10-13 04:59:11,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:11,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:59:11,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:11,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:59:11,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:12,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:12,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:12,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:12,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:12,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:12,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:59:12,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:12,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:12,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:12,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:12,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:12,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427987161] [2020-10-13 04:59:12,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:12,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:59:12,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442693619] [2020-10-13 04:59:12,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:59:12,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:12,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:59:12,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:59:12,111 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 31 states. [2020-10-13 04:59:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:12,199 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-13 04:59:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:59:12,199 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 40 [2020-10-13 04:59:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:12,200 INFO L225 Difference]: With dead ends: 57 [2020-10-13 04:59:12,200 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 04:59:12,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:59:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 04:59:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 04:59:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:59:12,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-13 04:59:12,205 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2020-10-13 04:59:12,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:12,205 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-13 04:59:12,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:59:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-13 04:59:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 04:59:12,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:12,206 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:12,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:59:12,206 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:12,207 INFO L82 PathProgramCache]: Analyzing trace with hash 891243698, now seen corresponding path program 28 times [2020-10-13 04:59:12,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:12,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609373066] [2020-10-13 04:59:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:12,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:13,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:14,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:14,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 04:59:14,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:14,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1949 [2020-10-13 04:59:14,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:14,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:59:14,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:14,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:59:14,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:14,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:14,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:14,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:14,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:14,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:14,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:14,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:14,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:14,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:14,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:14,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:14,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609373066] [2020-10-13 04:59:14,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:14,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:59:14,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917679934] [2020-10-13 04:59:14,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:59:14,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:14,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:59:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:59:14,688 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 32 states. [2020-10-13 04:59:14,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:14,850 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-13 04:59:14,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:59:14,850 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 41 [2020-10-13 04:59:14,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:14,851 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:59:14,851 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 04:59:14,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:59:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 04:59:14,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 04:59:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 04:59:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-13 04:59:14,855 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2020-10-13 04:59:14,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:14,856 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-13 04:59:14,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:59:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-13 04:59:14,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:59:14,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:14,857 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:14,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:59:14,857 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash -232327826, now seen corresponding path program 29 times [2020-10-13 04:59:14,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:14,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602651617] [2020-10-13 04:59:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:14,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:15,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:18,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:18,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:59:18,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:18,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3163 [2020-10-13 04:59:18,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:18,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:59:18,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:18,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 04:59:18,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:18,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:18,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:18,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:18,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:18,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:18,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:18,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:18,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:18,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:18,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:18,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:59:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:18,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602651617] [2020-10-13 04:59:18,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:18,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:59:18,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293445024] [2020-10-13 04:59:18,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:59:18,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:18,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:59:18,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:59:18,599 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 33 states. [2020-10-13 04:59:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:18,820 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-13 04:59:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:59:18,821 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2020-10-13 04:59:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:18,822 INFO L225 Difference]: With dead ends: 59 [2020-10-13 04:59:18,822 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 04:59:18,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:59:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 04:59:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-13 04:59:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 04:59:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-13 04:59:18,836 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2020-10-13 04:59:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:18,836 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-13 04:59:18,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:59:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-13 04:59:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 04:59:18,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:18,838 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:18,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:59:18,840 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash -703306702, now seen corresponding path program 30 times [2020-10-13 04:59:18,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:18,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684827900] [2020-10-13 04:59:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:18,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:20,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:22,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:22,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:59:22,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:22,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4008 [2020-10-13 04:59:22,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:22,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:59:22,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:22,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:59:22,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:23,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:23,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:23,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:23,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:23,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:23,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:59:23,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:23,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:23,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:23,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:23,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:23,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684827900] [2020-10-13 04:59:23,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:23,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:59:23,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868817818] [2020-10-13 04:59:23,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:59:23,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:23,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:59:23,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:59:23,480 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 34 states. [2020-10-13 04:59:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:23,652 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-13 04:59:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:59:23,652 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 43 [2020-10-13 04:59:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:23,653 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:59:23,653 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:59:23,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:59:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:59:23,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 04:59:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 04:59:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-13 04:59:23,660 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2020-10-13 04:59:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:23,661 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-13 04:59:23,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:59:23,661 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-13 04:59:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:59:23,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:23,663 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:23,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:59:23,664 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:23,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1876217326, now seen corresponding path program 31 times [2020-10-13 04:59:23,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:23,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775910167] [2020-10-13 04:59:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:23,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:25,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:26,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:26,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:59:26,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:26,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2349 [2020-10-13 04:59:26,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:26,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:59:26,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:26,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 04:59:26,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:26,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:26,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:26,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:26,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:26,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:26,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:26,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:26,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:26,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:26,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775910167] [2020-10-13 04:59:26,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:26,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:59:26,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524737463] [2020-10-13 04:59:26,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:59:26,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:26,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:59:26,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:59:26,648 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 35 states. [2020-10-13 04:59:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:26,817 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-13 04:59:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:59:26,818 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 44 [2020-10-13 04:59:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:26,818 INFO L225 Difference]: With dead ends: 61 [2020-10-13 04:59:26,819 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 04:59:26,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:59:26,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 04:59:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 04:59:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 04:59:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-13 04:59:26,823 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2020-10-13 04:59:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:26,823 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-13 04:59:26,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:59:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-13 04:59:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 04:59:26,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:26,824 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:26,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:59:26,824 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:26,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:26,825 INFO L82 PathProgramCache]: Analyzing trace with hash 237083570, now seen corresponding path program 32 times [2020-10-13 04:59:26,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:26,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249352195] [2020-10-13 04:59:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:26,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:28,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:30,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:30,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 04:59:30,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:30,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3365 [2020-10-13 04:59:30,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:30,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:59:30,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:30,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:59:30,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:30,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:30,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:30,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:30,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:30,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:30,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:30,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:30,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:30,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:30,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:30,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:30,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249352195] [2020-10-13 04:59:30,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:30,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:59:30,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022188574] [2020-10-13 04:59:30,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:59:30,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:30,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:59:30,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:59:30,836 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 36 states. [2020-10-13 04:59:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:31,026 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-13 04:59:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:59:31,027 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 45 [2020-10-13 04:59:31,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:31,028 INFO L225 Difference]: With dead ends: 62 [2020-10-13 04:59:31,028 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 04:59:31,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:59:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 04:59:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 04:59:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 04:59:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-13 04:59:31,033 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2020-10-13 04:59:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:31,034 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-13 04:59:31,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:59:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-13 04:59:31,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 04:59:31,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:31,035 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:31,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:59:31,035 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:31,035 INFO L82 PathProgramCache]: Analyzing trace with hash 963544686, now seen corresponding path program 33 times [2020-10-13 04:59:31,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:31,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056769665] [2020-10-13 04:59:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:31,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:33,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:34,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:34,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 04:59:34,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:34,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3286 [2020-10-13 04:59:34,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:34,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:59:34,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:34,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:59:34,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:34,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:34,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:34,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:34,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:34,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:34,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:34,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:34,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:34,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:34,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056769665] [2020-10-13 04:59:34,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:34,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:59:34,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295951910] [2020-10-13 04:59:34,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:59:34,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:34,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:59:34,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:59:34,982 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 37 states. [2020-10-13 04:59:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:35,112 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-13 04:59:35,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:59:35,112 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 46 [2020-10-13 04:59:35,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:35,113 INFO L225 Difference]: With dead ends: 63 [2020-10-13 04:59:35,113 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 04:59:35,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:59:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 04:59:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 04:59:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:59:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-13 04:59:35,118 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2020-10-13 04:59:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:35,119 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-13 04:59:35,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:59:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-13 04:59:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:59:35,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:35,119 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:35,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:59:35,120 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:35,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2009002802, now seen corresponding path program 34 times [2020-10-13 04:59:35,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:35,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569324067] [2020-10-13 04:59:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:35,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:37,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:39,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:39,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:59:39,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:39,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4202 [2020-10-13 04:59:39,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:39,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:59:39,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:39,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:59:39,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:40,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:40,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:40,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:40,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:40,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:40,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:40,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:40,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:40,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:40,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:40,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:40,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569324067] [2020-10-13 04:59:40,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:40,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:59:40,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870434529] [2020-10-13 04:59:40,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:59:40,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:40,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:59:40,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:59:40,036 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 38 states. [2020-10-13 04:59:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:40,115 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-13 04:59:40,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:59:40,115 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 47 [2020-10-13 04:59:40,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:40,116 INFO L225 Difference]: With dead ends: 64 [2020-10-13 04:59:40,116 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 04:59:40,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:59:40,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 04:59:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-13 04:59:40,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 04:59:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-13 04:59:40,123 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2020-10-13 04:59:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:40,123 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-13 04:59:40,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:59:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-13 04:59:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 04:59:40,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:40,124 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:40,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:59:40,124 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:40,124 INFO L82 PathProgramCache]: Analyzing trace with hash 58466030, now seen corresponding path program 35 times [2020-10-13 04:59:40,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:40,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330534667] [2020-10-13 04:59:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:40,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:42,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:44,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:44,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 04:59:44,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:44,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4186 [2020-10-13 04:59:44,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:44,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:59:44,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:44,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 04:59:44,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:45,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:45,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:45,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:45,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:45,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:45,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:45,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:45,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:45,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:45,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:45,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:45,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330534667] [2020-10-13 04:59:45,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:45,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:59:45,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088931694] [2020-10-13 04:59:45,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:59:45,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:45,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:59:45,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:59:45,076 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 39 states. [2020-10-13 04:59:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:45,286 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-13 04:59:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:59:45,287 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 48 [2020-10-13 04:59:45,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:45,287 INFO L225 Difference]: With dead ends: 65 [2020-10-13 04:59:45,288 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 04:59:45,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:59:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 04:59:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-13 04:59:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:59:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-13 04:59:45,295 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2020-10-13 04:59:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:45,295 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-13 04:59:45,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:59:45,296 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-13 04:59:45,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:59:45,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:45,296 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:45,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:59:45,297 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:45,297 INFO L82 PathProgramCache]: Analyzing trace with hash -278631758, now seen corresponding path program 36 times [2020-10-13 04:59:45,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:45,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35117586] [2020-10-13 04:59:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:45,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:47,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:50,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:50,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:59:50,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:50,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4926 [2020-10-13 04:59:50,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:50,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:59:50,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:50,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:59:50,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:51,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:51,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:51,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:51,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:51,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:51,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:51,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:51,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:51,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:51,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35117586] [2020-10-13 04:59:51,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:51,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:59:51,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249038095] [2020-10-13 04:59:51,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:59:51,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:59:51,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:59:51,021 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 40 states. [2020-10-13 04:59:51,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:51,215 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-13 04:59:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:59:51,216 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2020-10-13 04:59:51,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:51,217 INFO L225 Difference]: With dead ends: 66 [2020-10-13 04:59:51,217 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 04:59:51,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:59:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 04:59:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 04:59:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 04:59:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-13 04:59:51,222 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2020-10-13 04:59:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:51,222 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-13 04:59:51,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:59:51,222 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-13 04:59:51,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 04:59:51,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:51,223 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:51,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:59:51,223 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:51,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:51,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2138728594, now seen corresponding path program 37 times [2020-10-13 04:59:51,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:51,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470479628] [2020-10-13 04:59:51,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:51,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:54,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:56,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:56,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 04:59:56,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:56,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4987 [2020-10-13 04:59:56,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:56,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:59:56,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:56,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 04:59:56,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:57,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:57,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:57,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:57,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:57,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:57,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:57,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:57,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:57,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:57,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:57,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:57,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470479628] [2020-10-13 04:59:57,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:57,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:59:57,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020363357] [2020-10-13 04:59:57,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:59:57,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:59:57,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:59:57,039 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 41 states. [2020-10-13 04:59:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:57,244 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-13 04:59:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:59:57,245 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 50 [2020-10-13 04:59:57,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:57,246 INFO L225 Difference]: With dead ends: 67 [2020-10-13 04:59:57,246 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 04:59:57,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:59:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 04:59:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-13 04:59:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:59:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-13 04:59:57,250 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2020-10-13 04:59:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:57,250 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-13 04:59:57,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:59:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-13 04:59:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:59:57,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:57,251 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:57,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:59:57,251 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash 327811634, now seen corresponding path program 38 times [2020-10-13 04:59:57,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:57,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371867010] [2020-10-13 04:59:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:57,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:00,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:02,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:02,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:00:02,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:02,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:00:02,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 05:00:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:00:02,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:03,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:03,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:03,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:03,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:03,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:03,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:03,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:03,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:03,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:03,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:03,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:03,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371867010] [2020-10-13 05:00:03,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:03,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 05:00:03,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330975227] [2020-10-13 05:00:03,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 05:00:03,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:03,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 05:00:03,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:00:03,156 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 42 states. [2020-10-13 05:00:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:03,232 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-13 05:00:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 05:00:03,232 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 51 [2020-10-13 05:00:03,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:03,233 INFO L225 Difference]: With dead ends: 68 [2020-10-13 05:00:03,234 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 05:00:03,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:00:03,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 05:00:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-13 05:00:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 05:00:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-13 05:00:03,240 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2020-10-13 05:00:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:03,241 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-13 05:00:03,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 05:00:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-13 05:00:03,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 05:00:03,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:03,242 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:03,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 05:00:03,242 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:03,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:03,242 INFO L82 PathProgramCache]: Analyzing trace with hash -518852626, now seen corresponding path program 39 times [2020-10-13 05:00:03,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:03,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431942711] [2020-10-13 05:00:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:03,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:06,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:08,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:08,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 05:00:08,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:08,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:00:08,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:08,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 05:00:08,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:08,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 05:00:08,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:09,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:09,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:09,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:09,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:09,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:09,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:09,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:09,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:09,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:09,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:09,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431942711] [2020-10-13 05:00:09,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:09,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 05:00:09,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049905736] [2020-10-13 05:00:09,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 05:00:09,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:09,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 05:00:09,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:00:09,171 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 43 states. [2020-10-13 05:00:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:09,294 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-13 05:00:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 05:00:09,294 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 52 [2020-10-13 05:00:09,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:09,295 INFO L225 Difference]: With dead ends: 69 [2020-10-13 05:00:09,295 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 05:00:09,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:00:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 05:00:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 05:00:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 05:00:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-13 05:00:09,300 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 52 [2020-10-13 05:00:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:09,300 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-13 05:00:09,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 05:00:09,300 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-13 05:00:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:00:09,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:09,301 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:09,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 05:00:09,301 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:09,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:09,301 INFO L82 PathProgramCache]: Analyzing trace with hash -995640910, now seen corresponding path program 40 times [2020-10-13 05:00:09,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:09,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190048023] [2020-10-13 05:00:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:09,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:12,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:14,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:14,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:00:14,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:14,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 05:00:14,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 05:00:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:00:14,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:15,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:15,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:15,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:15,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:15,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:15,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:15,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:15,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:15,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:15,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:15,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:15,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190048023] [2020-10-13 05:00:15,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:15,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 05:00:15,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712170355] [2020-10-13 05:00:15,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 05:00:15,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:15,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 05:00:15,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:00:15,328 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 44 states. [2020-10-13 05:00:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:15,507 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-13 05:00:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 05:00:15,507 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2020-10-13 05:00:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:15,508 INFO L225 Difference]: With dead ends: 70 [2020-10-13 05:00:15,508 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 05:00:15,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:00:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 05:00:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 05:00:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 05:00:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-13 05:00:15,512 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 53 [2020-10-13 05:00:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:15,512 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-13 05:00:15,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 05:00:15,512 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-13 05:00:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:00:15,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:15,513 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:15,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 05:00:15,513 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1403791470, now seen corresponding path program 41 times [2020-10-13 05:00:15,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:15,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605795096] [2020-10-13 05:00:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:15,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:18,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:20,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:20,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:00:20,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:20,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5153 [2020-10-13 05:00:20,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:20,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 05:00:20,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:20,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 05:00:20,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:21,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:21,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:21,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:21,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:21,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:21,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:00:21,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:21,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:21,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:21,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:21,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:21,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605795096] [2020-10-13 05:00:21,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:21,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 05:00:21,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695702451] [2020-10-13 05:00:21,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 05:00:21,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:21,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 05:00:21,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:00:21,715 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 45 states. [2020-10-13 05:00:21,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:21,949 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-13 05:00:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 05:00:21,950 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 54 [2020-10-13 05:00:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:21,951 INFO L225 Difference]: With dead ends: 71 [2020-10-13 05:00:21,951 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 05:00:21,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:00:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 05:00:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-13 05:00:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 05:00:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-13 05:00:21,957 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 54 [2020-10-13 05:00:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:21,957 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-13 05:00:21,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 05:00:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-13 05:00:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:00:21,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:21,958 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:21,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 05:00:21,958 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:21,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:21,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1523216078, now seen corresponding path program 42 times [2020-10-13 05:00:21,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:21,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560937976] [2020-10-13 05:00:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:21,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:26,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:27,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:27,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:00:27,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:27,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5257 [2020-10-13 05:00:27,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 05:00:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:00:27,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:28,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:28,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:28,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:28,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:28,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:28,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:28,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:28,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:28,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:28,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:28,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:28,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560937976] [2020-10-13 05:00:28,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:28,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 05:00:28,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147377781] [2020-10-13 05:00:28,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 05:00:28,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:28,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 05:00:28,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:00:28,288 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 46 states. [2020-10-13 05:00:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:28,431 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-13 05:00:28,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 05:00:28,432 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 55 [2020-10-13 05:00:28,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:28,433 INFO L225 Difference]: With dead ends: 72 [2020-10-13 05:00:28,433 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 05:00:28,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:00:28,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 05:00:28,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 05:00:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 05:00:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-13 05:00:28,438 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2020-10-13 05:00:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:28,439 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-13 05:00:28,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 05:00:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-13 05:00:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:00:28,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:28,439 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:28,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 05:00:28,440 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:28,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2066136850, now seen corresponding path program 43 times [2020-10-13 05:00:28,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:28,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036140517] [2020-10-13 05:00:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:28,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:33,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:33,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:00:33,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:33,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:00:33,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:33,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 05:00:33,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:33,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 05:00:33,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:34,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:34,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:34,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:34,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:34,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:34,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:34,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:34,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:34,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:34,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:34,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:34,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036140517] [2020-10-13 05:00:34,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:34,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 05:00:34,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475816843] [2020-10-13 05:00:34,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 05:00:34,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:34,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 05:00:34,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:00:34,612 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 47 states. [2020-10-13 05:00:34,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:34,853 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-13 05:00:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 05:00:34,853 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 56 [2020-10-13 05:00:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:34,854 INFO L225 Difference]: With dead ends: 73 [2020-10-13 05:00:34,855 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 05:00:34,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:00:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 05:00:34,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-13 05:00:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 05:00:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-13 05:00:34,859 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2020-10-13 05:00:34,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:34,859 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-13 05:00:34,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 05:00:34,859 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-13 05:00:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 05:00:34,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:34,860 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:34,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 05:00:34,860 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1716811598, now seen corresponding path program 44 times [2020-10-13 05:00:34,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:34,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872510229] [2020-10-13 05:00:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:34,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:39,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:39,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 05:00:39,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:39,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 05:00:39,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:39,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 05:00:39,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:39,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 05:00:39,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:44,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:44,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:44,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:44,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:44,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:44,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:44,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:44,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:44,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:44,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:44,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 861 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:44,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872510229] [2020-10-13 05:00:44,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:44,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 05:00:44,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211115150] [2020-10-13 05:00:44,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 05:00:44,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:44,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 05:00:44,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1047, Invalid=1605, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 05:00:44,036 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 52 states. [2020-10-13 05:00:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:44,722 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-10-13 05:00:44,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 05:00:44,723 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 57 [2020-10-13 05:00:44,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:44,724 INFO L225 Difference]: With dead ends: 72 [2020-10-13 05:00:44,724 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 05:00:44,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1158, Invalid=2034, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 05:00:44,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 05:00:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-13 05:00:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 05:00:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-13 05:00:44,732 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 57 [2020-10-13 05:00:44,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:44,733 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-13 05:00:44,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 05:00:44,733 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-13 05:00:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:00:44,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:44,734 INFO L422 BasicCegarLoop]: trace histogram [44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:44,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 05:00:44,734 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:44,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:44,734 INFO L82 PathProgramCache]: Analyzing trace with hash -207540119, now seen corresponding path program 1 times [2020-10-13 05:00:44,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:44,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396623172] [2020-10-13 05:00:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:44,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:49,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:51,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:51,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:00:51,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:51,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7219 [2020-10-13 05:00:51,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:51,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 05:00:51,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:00:51,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:53,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:53,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:53,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:53,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:53,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:53,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:00:53,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:53,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:53,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:53,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:53,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:53,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 05:00:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:53,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:53,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:53,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:00:53,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:53,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:53,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:53,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:53,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:00:53,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:53,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 2 proven. 990 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:00:53,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396623172] [2020-10-13 05:00:53,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:53,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 05:00:53,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955975508] [2020-10-13 05:00:53,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 05:00:53,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:53,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 05:00:53,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:00:53,229 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 48 states. [2020-10-13 05:00:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:53,375 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-13 05:00:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 05:00:53,375 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 65 [2020-10-13 05:00:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:53,379 INFO L225 Difference]: With dead ends: 86 [2020-10-13 05:00:53,379 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 05:00:53,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:00:53,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 05:00:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-13 05:00:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 05:00:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-13 05:00:53,389 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2020-10-13 05:00:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:53,389 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-13 05:00:53,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 05:00:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-13 05:00:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:00:53,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:53,391 INFO L422 BasicCegarLoop]: trace histogram [45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:53,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 05:00:53,391 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:53,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1851169499, now seen corresponding path program 2 times [2020-10-13 05:00:53,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:53,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757037869] [2020-10-13 05:00:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:53,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:58,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:58,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 05:00:58,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:58,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:00:58,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:58,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 05:00:58,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:58,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:00:58,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:59,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:59,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:59,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:59,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:59,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:59,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:59,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:59,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:59,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:59,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:59,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:59,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:00:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:59,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:59,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:59,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:00:59,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:59,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:00:59,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:59,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:59,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:00:59,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:59,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 2 proven. 1035 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:00:59,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757037869] [2020-10-13 05:00:59,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:59,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 05:00:59,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993028586] [2020-10-13 05:00:59,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 05:00:59,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:59,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 05:00:59,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:00:59,688 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 49 states. [2020-10-13 05:00:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:59,860 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-13 05:00:59,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 05:00:59,862 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 66 [2020-10-13 05:00:59,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:59,863 INFO L225 Difference]: With dead ends: 87 [2020-10-13 05:00:59,863 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 05:00:59,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:00:59,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 05:00:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 05:00:59,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 05:00:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-13 05:00:59,872 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 66 [2020-10-13 05:00:59,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:59,873 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-13 05:00:59,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 05:00:59,873 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-13 05:00:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 05:00:59,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:59,874 INFO L422 BasicCegarLoop]: trace histogram [46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:59,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 05:00:59,874 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:59,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1264072727, now seen corresponding path program 3 times [2020-10-13 05:00:59,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:59,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577308169] [2020-10-13 05:00:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:59,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:04,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:04,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 05:01:04,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:04,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 05:01:04,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 05:01:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 05:01:04,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:06,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:06,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:06,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:06,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:06,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:06,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:06,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:06,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:06,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:06,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 05:01:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:06,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:06,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:06,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:01:06,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:06,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:01:06,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:06,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:06,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:01:06,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:06,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 2 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:01:06,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577308169] [2020-10-13 05:01:06,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:06,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 05:01:06,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763893235] [2020-10-13 05:01:06,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 05:01:06,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:06,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 05:01:06,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 05:01:06,418 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 50 states. [2020-10-13 05:01:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:06,670 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-13 05:01:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 05:01:06,670 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 67 [2020-10-13 05:01:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:06,671 INFO L225 Difference]: With dead ends: 88 [2020-10-13 05:01:06,671 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 05:01:06,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 05:01:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 05:01:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-13 05:01:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:01:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-13 05:01:06,682 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 67 [2020-10-13 05:01:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:06,683 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-13 05:01:06,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 05:01:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-13 05:01:06,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 05:01:06,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:06,684 INFO L422 BasicCegarLoop]: trace histogram [47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:06,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 05:01:06,684 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:06,684 INFO L82 PathProgramCache]: Analyzing trace with hash -243941979, now seen corresponding path program 4 times [2020-10-13 05:01:06,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:06,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934135720] [2020-10-13 05:01:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:06,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:11,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:11,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:01:11,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:11,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 05:01:11,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:11,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 05:01:11,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:11,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 05:01:11,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:13,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:13,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:13,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:13,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:13,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:13,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:13,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:13,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:13,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:13,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:13,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:13,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 05:01:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:13,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:13,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:13,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:01:13,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:13,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:13,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:13,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:13,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:01:13,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:13,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 2 proven. 1128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:01:13,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934135720] [2020-10-13 05:01:13,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:13,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 05:01:13,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425718741] [2020-10-13 05:01:13,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 05:01:13,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:13,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 05:01:13,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 05:01:13,095 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 51 states. [2020-10-13 05:01:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:13,369 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-13 05:01:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 05:01:13,370 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 68 [2020-10-13 05:01:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:13,371 INFO L225 Difference]: With dead ends: 89 [2020-10-13 05:01:13,371 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 05:01:13,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 05:01:13,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 05:01:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-13 05:01:13,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 05:01:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-13 05:01:13,379 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2020-10-13 05:01:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:13,379 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-13 05:01:13,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 05:01:13,379 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-13 05:01:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 05:01:13,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:13,380 INFO L422 BasicCegarLoop]: trace histogram [48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:13,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 05:01:13,380 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:13,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:13,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1315340137, now seen corresponding path program 5 times [2020-10-13 05:01:13,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:13,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467116559] [2020-10-13 05:01:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:13,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:18,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:18,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:01:18,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:18,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:01:18,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:18,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 05:01:18,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:18,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 05:01:18,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:19,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:19,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:19,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:19,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:19,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:19,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:19,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:19,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:19,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:19,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:19,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:19,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 05:01:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:19,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:19,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:19,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:01:19,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:19,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:01:19,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:01:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:19,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 2 proven. 1176 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:01:19,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467116559] [2020-10-13 05:01:19,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:19,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 05:01:19,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325965494] [2020-10-13 05:01:19,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 05:01:19,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:19,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 05:01:19,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 05:01:19,983 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 52 states. [2020-10-13 05:01:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:20,264 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-13 05:01:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 05:01:20,265 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 69 [2020-10-13 05:01:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:20,266 INFO L225 Difference]: With dead ends: 90 [2020-10-13 05:01:20,266 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 05:01:20,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 05:01:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 05:01:20,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-13 05:01:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:01:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-13 05:01:20,280 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2020-10-13 05:01:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:20,280 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-13 05:01:20,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 05:01:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-13 05:01:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 05:01:20,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:20,282 INFO L422 BasicCegarLoop]: trace histogram [49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:20,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 05:01:20,282 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:20,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1886521819, now seen corresponding path program 6 times [2020-10-13 05:01:20,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:20,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997506450] [2020-10-13 05:01:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:20,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:25,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:25,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 05:01:25,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:25,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 05:01:25,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 05:01:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 05:01:25,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:26,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:26,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:26,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:26,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:26,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:26,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:26,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:26,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:26,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:26,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:26,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:26,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 05:01:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:26,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:26,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:26,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:01:26,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:26,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:01:26,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:26,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:26,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:01:26,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:26,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 2 proven. 1225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:01:26,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997506450] [2020-10-13 05:01:26,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:26,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 05:01:26,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879736713] [2020-10-13 05:01:26,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 05:01:26,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:26,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 05:01:26,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 05:01:26,804 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 53 states. [2020-10-13 05:01:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:27,074 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-13 05:01:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 05:01:27,075 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 70 [2020-10-13 05:01:27,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:27,076 INFO L225 Difference]: With dead ends: 91 [2020-10-13 05:01:27,076 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:01:27,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 05:01:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:01:27,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-13 05:01:27,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 05:01:27,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-13 05:01:27,084 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 70 [2020-10-13 05:01:27,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:27,085 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-13 05:01:27,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 05:01:27,085 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-13 05:01:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 05:01:27,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:27,086 INFO L422 BasicCegarLoop]: trace histogram [50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:27,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 05:01:27,086 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:27,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:27,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1934972649, now seen corresponding path program 7 times [2020-10-13 05:01:27,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:27,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226777632] [2020-10-13 05:01:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:27,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:32,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:32,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 05:01:32,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:32,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 05:01:32,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:32,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 05:01:32,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:32,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:01:32,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:33,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:33,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:33,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:33,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:33,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:33,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:33,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:33,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:33,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 05:01:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:33,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:33,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:33,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:01:33,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:33,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:01:33,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:01:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:33,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 2 proven. 1275 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:01:33,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226777632] [2020-10-13 05:01:33,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:33,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 05:01:33,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154285003] [2020-10-13 05:01:33,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 05:01:33,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:33,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 05:01:33,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 05:01:33,674 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 54 states. [2020-10-13 05:01:33,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:33,834 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-13 05:01:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 05:01:33,834 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 71 [2020-10-13 05:01:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:33,835 INFO L225 Difference]: With dead ends: 92 [2020-10-13 05:01:33,835 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 05:01:33,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 05:01:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 05:01:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-13 05:01:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 05:01:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-13 05:01:33,844 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2020-10-13 05:01:33,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:33,845 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-13 05:01:33,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 05:01:33,845 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-13 05:01:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 05:01:33,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:33,847 INFO L422 BasicCegarLoop]: trace histogram [51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:33,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 05:01:33,848 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:33,848 INFO L82 PathProgramCache]: Analyzing trace with hash 142216869, now seen corresponding path program 8 times [2020-10-13 05:01:33,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:33,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212522367] [2020-10-13 05:01:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:33,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:38,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:38,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:01:38,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:38,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:01:38,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:38,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 05:01:38,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:38,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 05:01:38,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:40,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:40,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:40,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:40,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:40,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:40,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:40,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:40,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:40,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:40,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:40,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:40,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 05:01:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:40,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:40,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:40,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:01:40,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:40,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:01:40,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:40,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:40,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:01:40,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:40,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 2 proven. 1326 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:01:40,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212522367] [2020-10-13 05:01:40,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:40,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 05:01:40,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106557813] [2020-10-13 05:01:40,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 05:01:40,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:40,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 05:01:40,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 05:01:40,474 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 55 states. [2020-10-13 05:01:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:40,778 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-13 05:01:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 05:01:40,779 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 72 [2020-10-13 05:01:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:40,780 INFO L225 Difference]: With dead ends: 93 [2020-10-13 05:01:40,780 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 05:01:40,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 05:01:40,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 05:01:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 05:01:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:01:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-13 05:01:40,787 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2020-10-13 05:01:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:40,788 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-13 05:01:40,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-13 05:01:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-13 05:01:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 05:01:40,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:40,789 INFO L422 BasicCegarLoop]: trace histogram [52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:40,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 05:01:40,789 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:40,790 INFO L82 PathProgramCache]: Analyzing trace with hash 401362537, now seen corresponding path program 9 times [2020-10-13 05:01:40,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:40,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8077234] [2020-10-13 05:01:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:40,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:45,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:45,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 05:01:45,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:45,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-13 05:01:45,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 05:01:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:01:45,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:47,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:47,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:47,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:47,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:47,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:47,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:47,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:47,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:47,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:47,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:47,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:47,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 05:01:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:47,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:47,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:47,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:01:47,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:47,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:01:47,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:01:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:47,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1382 backedges. 2 proven. 1378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:01:47,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8077234] [2020-10-13 05:01:47,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:47,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 05:01:47,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291972871] [2020-10-13 05:01:47,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 05:01:47,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:47,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 05:01:47,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 05:01:47,534 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 56 states. [2020-10-13 05:01:47,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:47,827 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-13 05:01:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 05:01:47,828 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 73 [2020-10-13 05:01:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:47,829 INFO L225 Difference]: With dead ends: 94 [2020-10-13 05:01:47,829 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 05:01:47,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 05:01:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 05:01:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-13 05:01:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 05:01:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-13 05:01:47,836 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2020-10-13 05:01:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:47,836 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-13 05:01:47,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 05:01:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-13 05:01:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 05:01:47,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:47,837 INFO L422 BasicCegarLoop]: trace histogram [53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:47,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 05:01:47,838 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:47,838 INFO L82 PathProgramCache]: Analyzing trace with hash -155056347, now seen corresponding path program 10 times [2020-10-13 05:01:47,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:47,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261586168] [2020-10-13 05:01:47,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:47,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:52,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:52,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 05:01:52,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:52,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 05:01:52,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:52,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 05:01:52,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:52,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 05:01:52,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:54,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:54,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:54,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:54,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:54,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:54,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:54,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:54,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:54,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 05:01:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:54,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:54,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:54,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:01:54,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:54,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:01:54,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:54,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:54,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:01:54,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:54,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1435 backedges. 2 proven. 1431 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:01:54,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261586168] [2020-10-13 05:01:54,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:54,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 05:01:54,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725969898] [2020-10-13 05:01:54,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 05:01:54,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:54,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 05:01:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 05:01:54,623 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 57 states. [2020-10-13 05:01:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:54,926 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-13 05:01:54,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 05:01:54,927 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 74 [2020-10-13 05:01:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:54,928 INFO L225 Difference]: With dead ends: 95 [2020-10-13 05:01:54,928 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 05:01:54,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 05:01:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 05:01:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-13 05:01:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 05:01:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-13 05:01:54,936 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2020-10-13 05:01:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:54,936 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-13 05:01:54,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 05:01:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-13 05:01:54,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 05:01:54,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:54,937 INFO L422 BasicCegarLoop]: trace histogram [54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:54,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 05:01:54,937 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:54,938 INFO L82 PathProgramCache]: Analyzing trace with hash -224172567, now seen corresponding path program 11 times [2020-10-13 05:01:54,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:54,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315352975] [2020-10-13 05:01:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:54,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:59,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:59,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 05:01:59,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:59,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 05:01:59,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 05:01:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 05:01:59,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:01,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:01,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:01,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:01,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:01,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:01,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:01,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:01,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:01,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:01,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:01,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:01,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 05:02:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:01,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:01,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:01,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:01,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:01,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:02:01,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:02:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:01,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 2 proven. 1485 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:02:01,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315352975] [2020-10-13 05:02:01,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:01,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 05:02:01,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788072955] [2020-10-13 05:02:01,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 05:02:01,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:01,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 05:02:01,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 05:02:01,752 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 58 states. [2020-10-13 05:02:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:02,055 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-10-13 05:02:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 05:02:02,056 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 75 [2020-10-13 05:02:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:02,057 INFO L225 Difference]: With dead ends: 96 [2020-10-13 05:02:02,057 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 05:02:02,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 05:02:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 05:02:02,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 05:02:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:02:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-13 05:02:02,064 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 75 [2020-10-13 05:02:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:02,064 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-13 05:02:02,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 05:02:02,065 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-13 05:02:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 05:02:02,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:02,065 INFO L422 BasicCegarLoop]: trace histogram [55, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:02,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 05:02:02,066 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:02,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:02,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1928191909, now seen corresponding path program 12 times [2020-10-13 05:02:02,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:02,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403043596] [2020-10-13 05:02:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:02,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:07,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:07,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 05:02:07,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:07,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 05:02:07,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:07,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-13 05:02:07,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:07,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 05:02:07,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:08,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:08,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:08,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:08,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:08,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:08,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:02:08,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:08,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:08,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:08,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 05:02:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:08,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:08,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:08,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:08,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:08,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:08,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:08,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:08,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:02:08,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:08,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:02:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 2 proven. 1540 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:02:08,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403043596] [2020-10-13 05:02:08,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:08,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 05:02:08,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745953788] [2020-10-13 05:02:08,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 05:02:08,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:08,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 05:02:08,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 05:02:08,955 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 59 states. [2020-10-13 05:02:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:09,281 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-13 05:02:09,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 05:02:09,281 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 76 [2020-10-13 05:02:09,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:09,283 INFO L225 Difference]: With dead ends: 97 [2020-10-13 05:02:09,283 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 05:02:09,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 05:02:09,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 05:02:09,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-13 05:02:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 05:02:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-13 05:02:09,289 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2020-10-13 05:02:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:09,289 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-13 05:02:09,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 05:02:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-13 05:02:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:02:09,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:09,290 INFO L422 BasicCegarLoop]: trace histogram [56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:09,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 05:02:09,291 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:09,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:09,291 INFO L82 PathProgramCache]: Analyzing trace with hash -67986071, now seen corresponding path program 13 times [2020-10-13 05:02:09,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:09,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386246480] [2020-10-13 05:02:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:09,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:14,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:14,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 05:02:14,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:14,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 05:02:14,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 05:02:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 05:02:14,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:16,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:16,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:16,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:16,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:16,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:16,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:16,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:16,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:16,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:16,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:16,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:16,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-13 05:02:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:16,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:16,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:16,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:16,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:16,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:16,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:16,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:16,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:02:16,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:16,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 2 proven. 1596 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:02:16,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386246480] [2020-10-13 05:02:16,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:16,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-13 05:02:16,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676003502] [2020-10-13 05:02:16,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-13 05:02:16,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:16,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-13 05:02:16,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 05:02:16,191 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 60 states. [2020-10-13 05:02:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:16,514 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-13 05:02:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 05:02:16,515 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 77 [2020-10-13 05:02:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:16,516 INFO L225 Difference]: With dead ends: 98 [2020-10-13 05:02:16,516 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 05:02:16,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 05:02:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 05:02:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-13 05:02:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 05:02:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-13 05:02:16,522 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2020-10-13 05:02:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:16,522 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-13 05:02:16,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-13 05:02:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-13 05:02:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 05:02:16,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:16,523 INFO L422 BasicCegarLoop]: trace histogram [57, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:16,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 05:02:16,524 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:16,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1819961307, now seen corresponding path program 14 times [2020-10-13 05:02:16,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:16,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878175102] [2020-10-13 05:02:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:16,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:21,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:21,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 05:02:21,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:21,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 05:02:21,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:21,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 05:02:21,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:21,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 05:02:21,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:23,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:23,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:23,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:23,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:23,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:23,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:23,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:23,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:23,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 05:02:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:23,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:23,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:23,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:23,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:23,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:02:23,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:02:23,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:23,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 2 proven. 1653 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:02:23,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878175102] [2020-10-13 05:02:23,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:23,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-13 05:02:23,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522015681] [2020-10-13 05:02:23,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-13 05:02:23,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:23,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-13 05:02:23,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 05:02:23,468 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 61 states. [2020-10-13 05:02:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:23,822 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-13 05:02:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 05:02:23,823 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 78 [2020-10-13 05:02:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:23,824 INFO L225 Difference]: With dead ends: 99 [2020-10-13 05:02:23,824 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 05:02:23,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 05:02:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 05:02:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 05:02:23,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 05:02:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-13 05:02:23,832 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 78 [2020-10-13 05:02:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:23,833 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-13 05:02:23,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-13 05:02:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-13 05:02:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 05:02:23,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:23,834 INFO L422 BasicCegarLoop]: trace histogram [58, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:23,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 05:02:23,834 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:23,834 INFO L82 PathProgramCache]: Analyzing trace with hash -296618775, now seen corresponding path program 15 times [2020-10-13 05:02:23,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:23,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050463930] [2020-10-13 05:02:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:23,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:28,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:28,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 05:02:28,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:28,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-13 05:02:28,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:28,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-13 05:02:28,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:28,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 05:02:28,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:30,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:30,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:30,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:30,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:30,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:30,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:30,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:30,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:30,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 05:02:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:30,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:30,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:30,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:30,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:30,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:02:30,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:30,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:30,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:02:30,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:30,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 2 proven. 1711 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:02:30,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050463930] [2020-10-13 05:02:30,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:30,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 05:02:30,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520783587] [2020-10-13 05:02:30,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 05:02:30,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:30,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 05:02:30,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 05:02:30,919 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 62 states. [2020-10-13 05:02:31,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:31,270 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-10-13 05:02:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 05:02:31,271 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 79 [2020-10-13 05:02:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:31,272 INFO L225 Difference]: With dead ends: 100 [2020-10-13 05:02:31,272 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 05:02:31,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 05:02:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 05:02:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-13 05:02:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:02:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-13 05:02:31,278 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 79 [2020-10-13 05:02:31,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:31,279 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-13 05:02:31,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 05:02:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-13 05:02:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 05:02:31,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:31,279 INFO L422 BasicCegarLoop]: trace histogram [59, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:31,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 05:02:31,279 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:31,280 INFO L82 PathProgramCache]: Analyzing trace with hash -317640539, now seen corresponding path program 16 times [2020-10-13 05:02:31,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:31,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325498819] [2020-10-13 05:02:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:31,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:36,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:36,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 05:02:36,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:36,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5589 [2020-10-13 05:02:36,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 05:02:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 05:02:36,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0