/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/data_structures_set_multi_proc_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:38:16,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:38:16,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:38:16,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:38:16,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:38:16,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:38:16,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:38:16,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:38:16,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:38:16,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:38:16,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:38:16,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:38:16,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:38:16,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:38:16,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:38:16,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:38:16,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:38:16,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:38:16,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:38:16,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:38:16,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:38:16,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:38:16,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:38:16,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:38:16,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:38:16,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:38:16,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:38:16,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:38:16,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:38:16,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:38:16,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:38:16,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:38:16,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:38:16,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:38:16,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:38:16,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:38:16,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:38:16,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:38:16,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:38:16,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:38:16,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:38:16,518 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 04:38:16,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:38:16,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:38:16,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:38:16,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:38:16,543 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:38:16,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:38:16,543 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:38:16,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:38:16,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:38:16,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:38:16,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:38:16,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:38:16,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:38:16,545 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:38:16,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:38:16,548 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:38:16,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:38:16,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:38:16,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:38:16,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:38:16,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:38:16,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:38:16,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:38:16,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:38:16,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:38:16,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:38:16,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:38:16,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:38:16,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:38:16,551 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 04:38:16,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:38:16,865 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:38:16,869 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:38:16,871 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:38:16,874 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:38:16,875 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2020-10-13 04:38:16,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c41cad620/ec12c6d2a0bc4da9868c8630fcc7e208/FLAGdc8dbcff3 [2020-10-13 04:38:17,433 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:38:17,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2020-10-13 04:38:17,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c41cad620/ec12c6d2a0bc4da9868c8630fcc7e208/FLAGdc8dbcff3 [2020-10-13 04:38:17,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c41cad620/ec12c6d2a0bc4da9868c8630fcc7e208 [2020-10-13 04:38:17,806 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:38:17,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:38:17,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:17,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:38:17,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:38:17,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:17" (1/1) ... [2020-10-13 04:38:17,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ad3e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:17, skipping insertion in model container [2020-10-13 04:38:17,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:17" (1/1) ... [2020-10-13 04:38:17,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:38:17,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:38:18,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:18,052 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:38:18,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:18,095 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:38:18,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:18 WrapperNode [2020-10-13 04:38:18,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:18,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:38:18,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:38:18,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:38:18,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:18" (1/1) ... [2020-10-13 04:38:18,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:18" (1/1) ... [2020-10-13 04:38:18,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:18" (1/1) ... [2020-10-13 04:38:18,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:18" (1/1) ... [2020-10-13 04:38:18,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:18" (1/1) ... [2020-10-13 04:38:18,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:18" (1/1) ... [2020-10-13 04:38:18,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:18" (1/1) ... [2020-10-13 04:38:18,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:38:18,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:38:18,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:38:18,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:38:18,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:18" (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 04:38:18,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:38:18,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:38:18,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:38:18,292 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-10-13 04:38:18,292 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-10-13 04:38:18,293 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:38:18,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:38:18,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:38:18,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:38:18,293 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-10-13 04:38:18,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:38:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-10-13 04:38:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:38:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:38:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:38:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:38:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:38:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:38:18,636 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:38:18,636 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-13 04:38:18,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:18 BoogieIcfgContainer [2020-10-13 04:38:18,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:38:18,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:38:18,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:38:18,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:38:18,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:38:17" (1/3) ... [2020-10-13 04:38:18,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5e1a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:18, skipping insertion in model container [2020-10-13 04:38:18,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:18" (2/3) ... [2020-10-13 04:38:18,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5e1a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:18, skipping insertion in model container [2020-10-13 04:38:18,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:18" (3/3) ... [2020-10-13 04:38:18,650 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2020-10-13 04:38:18,660 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:38:18,667 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:38:18,696 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:38:18,723 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:38:18,723 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:38:18,723 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:38:18,724 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:38:18,724 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:38:18,724 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:38:18,724 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:38:18,724 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:38:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-13 04:38:18,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 04:38:18,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:18,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:18,752 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:18,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1780536170, now seen corresponding path program 1 times [2020-10-13 04:38:18,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:18,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644580694] [2020-10-13 04:38:18,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:18,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:18,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:19,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 04:38:19,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:19,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-13 04:38:19,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:19,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:38:19,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:19,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:38:19,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 04:38:19,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:19,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:19,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:19,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:19,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:38:19,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:19,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:19,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:19,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:19,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:19,323 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 04:38:19,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644580694] [2020-10-13 04:38:19,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:19,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:38:19,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370954820] [2020-10-13 04:38:19,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:38:19,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:19,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:38:19,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:19,351 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-10-13 04:38:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:19,650 INFO L93 Difference]: Finished difference Result 129 states and 190 transitions. [2020-10-13 04:38:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:38:19,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 04:38:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:19,664 INFO L225 Difference]: With dead ends: 129 [2020-10-13 04:38:19,665 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 04:38:19,669 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 04:38:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 04:38:19,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2020-10-13 04:38:19,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 04:38:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-13 04:38:19,727 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 14 [2020-10-13 04:38:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:19,727 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-13 04:38:19,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:38:19,728 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-13 04:38:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:38:19,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:19,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:19,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:38:19,731 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:19,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2111973388, now seen corresponding path program 1 times [2020-10-13 04:38:19,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:19,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027109595] [2020-10-13 04:38:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:19,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:19,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:38:19,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:19,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-13 04:38:19,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:19,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:19,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:19,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:38:19,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:19,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:20,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:20,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:20,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:20,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:20,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:20,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:20,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:20,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:20,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:20,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:20,008 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 04:38:20,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027109595] [2020-10-13 04:38:20,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:20,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:38:20,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528425754] [2020-10-13 04:38:20,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:20,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:20,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:20,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:20,012 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 5 states. [2020-10-13 04:38:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:20,246 INFO L93 Difference]: Finished difference Result 142 states and 182 transitions. [2020-10-13 04:38:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:38:20,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 04:38:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:20,249 INFO L225 Difference]: With dead ends: 142 [2020-10-13 04:38:20,249 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 04:38:20,250 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 04:38:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 04:38:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 52. [2020-10-13 04:38:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:38:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-13 04:38:20,264 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 16 [2020-10-13 04:38:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:20,264 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-13 04:38:20,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-13 04:38:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 04:38:20,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:20,266 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:20,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:38:20,266 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:20,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:20,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1499407314, now seen corresponding path program 2 times [2020-10-13 04:38:20,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:20,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385292999] [2020-10-13 04:38:20,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:20,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:20,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:20,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:20,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 04:38:20,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:20,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-13 04:38:20,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:20,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:38:20,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:20,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:38:20,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:20,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:20,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:20,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:20,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:20,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:20,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:20,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:20,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:20,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:20,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:20,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:20,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385292999] [2020-10-13 04:38:20,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:20,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:38:20,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171818319] [2020-10-13 04:38:20,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:38:20,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:20,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:38:20,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:20,630 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 6 states. [2020-10-13 04:38:20,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:20,884 INFO L93 Difference]: Finished difference Result 168 states and 218 transitions. [2020-10-13 04:38:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:38:20,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-13 04:38:20,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:20,888 INFO L225 Difference]: With dead ends: 168 [2020-10-13 04:38:20,888 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 04:38:20,889 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 04:38:20,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 04:38:20,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 54. [2020-10-13 04:38:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:38:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-13 04:38:20,903 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 18 [2020-10-13 04:38:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:20,903 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-13 04:38:20,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:38:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-13 04:38:20,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:38:20,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:20,905 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:20,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:38:20,905 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:20,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1702686768, now seen corresponding path program 3 times [2020-10-13 04:38:20,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:20,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243860421] [2020-10-13 04:38:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:20,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:20,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:21,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:38:21,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:21,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-13 04:38:21,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:21,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:38:21,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:21,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:38:21,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:21,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:21,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:21,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:21,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:21,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:21,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:21,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:21,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:21,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:21,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:21,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243860421] [2020-10-13 04:38:21,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:21,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:38:21,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288099150] [2020-10-13 04:38:21,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:38:21,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:21,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:38:21,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:21,235 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 7 states. [2020-10-13 04:38:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:21,491 INFO L93 Difference]: Finished difference Result 194 states and 254 transitions. [2020-10-13 04:38:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:38:21,492 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 04:38:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:21,494 INFO L225 Difference]: With dead ends: 194 [2020-10-13 04:38:21,494 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 04:38:21,495 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 04:38:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 04:38:21,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 56. [2020-10-13 04:38:21,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:38:21,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-13 04:38:21,506 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 20 [2020-10-13 04:38:21,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:21,507 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-13 04:38:21,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:38:21,507 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-13 04:38:21,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:38:21,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:21,508 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:21,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:38:21,508 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:21,509 INFO L82 PathProgramCache]: Analyzing trace with hash 514253554, now seen corresponding path program 4 times [2020-10-13 04:38:21,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:21,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601223314] [2020-10-13 04:38:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:21,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:21,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:38:21,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:21,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-13 04:38:21,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:21,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:38:21,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:21,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:38:21,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:21,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:21,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:21,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:21,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:21,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:21,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:21,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:21,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:21,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:21,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:21,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601223314] [2020-10-13 04:38:21,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:21,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:38:21,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141430691] [2020-10-13 04:38:21,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:38:21,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:21,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:38:21,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:38:21,785 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 8 states. [2020-10-13 04:38:22,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:22,101 INFO L93 Difference]: Finished difference Result 220 states and 290 transitions. [2020-10-13 04:38:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:38:22,102 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-13 04:38:22,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:22,104 INFO L225 Difference]: With dead ends: 220 [2020-10-13 04:38:22,104 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 04:38:22,105 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 04:38:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 04:38:22,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 58. [2020-10-13 04:38:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:38:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-13 04:38:22,117 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 22 [2020-10-13 04:38:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:22,117 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-13 04:38:22,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:38:22,117 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-13 04:38:22,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:38:22,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:22,118 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:22,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:38:22,119 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:22,119 INFO L82 PathProgramCache]: Analyzing trace with hash 690124180, now seen corresponding path program 5 times [2020-10-13 04:38:22,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:22,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108638955] [2020-10-13 04:38:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:22,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:22,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:38:22,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:22,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-13 04:38:22,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:38:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:22,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:38:22,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:22,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:22,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:22,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:22,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:22,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:22,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:22,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:22,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:22,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:22,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:22,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108638955] [2020-10-13 04:38:22,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:22,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:38:22,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98749860] [2020-10-13 04:38:22,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:38:22,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:22,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:38:22,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:38:22,428 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 9 states. [2020-10-13 04:38:22,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:22,809 INFO L93 Difference]: Finished difference Result 246 states and 326 transitions. [2020-10-13 04:38:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:38:22,810 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-13 04:38:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:22,811 INFO L225 Difference]: With dead ends: 246 [2020-10-13 04:38:22,812 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 04:38:22,813 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 04:38:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 04:38:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 60. [2020-10-13 04:38:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 04:38:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-10-13 04:38:22,823 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 24 [2020-10-13 04:38:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:22,824 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-10-13 04:38:22,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:38:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-10-13 04:38:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 04:38:22,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:22,825 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:22,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:38:22,826 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:22,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:22,826 INFO L82 PathProgramCache]: Analyzing trace with hash -2096896074, now seen corresponding path program 6 times [2020-10-13 04:38:22,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:22,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461885877] [2020-10-13 04:38:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:22,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:23,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 04:38:23,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:23,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-13 04:38:23,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:23,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:23,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:23,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:38:23,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:23,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:23,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:23,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:23,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:23,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:23,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:23,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:23,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:23,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:23,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:23,181 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 04:38:23,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461885877] [2020-10-13 04:38:23,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:23,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:23,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143139045] [2020-10-13 04:38:23,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:23,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:23,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:23,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:23,184 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 10 states. [2020-10-13 04:38:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:23,593 INFO L93 Difference]: Finished difference Result 272 states and 362 transitions. [2020-10-13 04:38:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:38:23,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-13 04:38:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:23,596 INFO L225 Difference]: With dead ends: 272 [2020-10-13 04:38:23,596 INFO L226 Difference]: Without dead ends: 231 [2020-10-13 04:38:23,597 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 04:38:23,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-13 04:38:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 62. [2020-10-13 04:38:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 04:38:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-13 04:38:23,608 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 26 [2020-10-13 04:38:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:23,608 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-13 04:38:23,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-13 04:38:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:38:23,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:23,610 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:23,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:38:23,610 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:23,611 INFO L82 PathProgramCache]: Analyzing trace with hash -363767464, now seen corresponding path program 7 times [2020-10-13 04:38:23,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:23,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501775032] [2020-10-13 04:38:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:23,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:23,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:38:23,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:23,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-13 04:38:23,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:38:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:38:23,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:38:23,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:23,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:23,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:23,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:23,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:23,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:23,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:23,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:23,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:23,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:23,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501775032] [2020-10-13 04:38:23,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:23,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:38:23,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747291695] [2020-10-13 04:38:23,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:38:23,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:38:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:38:23,996 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 11 states. [2020-10-13 04:38:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:24,473 INFO L93 Difference]: Finished difference Result 298 states and 398 transitions. [2020-10-13 04:38:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:38:24,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-13 04:38:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:24,477 INFO L225 Difference]: With dead ends: 298 [2020-10-13 04:38:24,477 INFO L226 Difference]: Without dead ends: 257 [2020-10-13 04:38:24,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:38:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-13 04:38:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 64. [2020-10-13 04:38:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:38:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-13 04:38:24,488 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 28 [2020-10-13 04:38:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:24,488 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-13 04:38:24,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:38:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-13 04:38:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:38:24,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:24,490 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:24,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:38:24,490 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:24,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1274484102, now seen corresponding path program 8 times [2020-10-13 04:38:24,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:24,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470529914] [2020-10-13 04:38:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:24,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:24,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:24,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:24,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:38:24,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:24,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-13 04:38:24,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:24,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:38:24,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:24,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:38:24,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:24,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:24,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:24,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:24,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:24,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:24,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:24,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:24,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:24,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:24,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:24,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:24,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470529914] [2020-10-13 04:38:24,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:24,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:38:24,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181287396] [2020-10-13 04:38:24,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:38:24,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:24,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:38:24,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:38:24,964 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 12 states. [2020-10-13 04:38:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:25,477 INFO L93 Difference]: Finished difference Result 324 states and 434 transitions. [2020-10-13 04:38:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:38:25,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-13 04:38:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:25,481 INFO L225 Difference]: With dead ends: 324 [2020-10-13 04:38:25,481 INFO L226 Difference]: Without dead ends: 283 [2020-10-13 04:38:25,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:38:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-13 04:38:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 66. [2020-10-13 04:38:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 04:38:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-13 04:38:25,503 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 30 [2020-10-13 04:38:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:25,503 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-13 04:38:25,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:38:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-13 04:38:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:38:25,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:25,507 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:25,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:38:25,507 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:25,508 INFO L82 PathProgramCache]: Analyzing trace with hash -299844836, now seen corresponding path program 9 times [2020-10-13 04:38:25,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:25,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413636696] [2020-10-13 04:38:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:25,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:25,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:38:25,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:25,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-13 04:38:25,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:25,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:38:25,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:25,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:38:25,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:26,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:26,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:26,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:26,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:26,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:38:26,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:26,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:26,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:26,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:26,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:26,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413636696] [2020-10-13 04:38:26,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:26,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:38:26,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139758531] [2020-10-13 04:38:26,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:38:26,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:26,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:38:26,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:38:26,096 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 13 states. [2020-10-13 04:38:26,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:26,650 INFO L93 Difference]: Finished difference Result 350 states and 470 transitions. [2020-10-13 04:38:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:38:26,651 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-13 04:38:26,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:26,653 INFO L225 Difference]: With dead ends: 350 [2020-10-13 04:38:26,653 INFO L226 Difference]: Without dead ends: 309 [2020-10-13 04:38:26,654 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 04:38:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-13 04:38:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 68. [2020-10-13 04:38:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:38:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-13 04:38:26,662 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 32 [2020-10-13 04:38:26,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:26,662 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-13 04:38:26,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:38:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-13 04:38:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:38:26,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:26,664 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:26,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:38:26,664 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:26,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:26,665 INFO L82 PathProgramCache]: Analyzing trace with hash 25619262, now seen corresponding path program 10 times [2020-10-13 04:38:26,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:26,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559575619] [2020-10-13 04:38:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:26,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:27,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:38:27,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:27,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-13 04:38:27,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:27,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:38:27,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:27,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:38:27,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:27,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:27,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:27,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:27,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:27,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:27,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:27,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:27,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:27,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:27,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:27,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559575619] [2020-10-13 04:38:27,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:27,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:38:27,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955292317] [2020-10-13 04:38:27,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:38:27,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:27,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:38:27,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:38:27,348 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 14 states. [2020-10-13 04:38:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:28,149 INFO L93 Difference]: Finished difference Result 376 states and 506 transitions. [2020-10-13 04:38:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:38:28,150 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-13 04:38:28,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:28,153 INFO L225 Difference]: With dead ends: 376 [2020-10-13 04:38:28,153 INFO L226 Difference]: Without dead ends: 335 [2020-10-13 04:38:28,154 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 04:38:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-13 04:38:28,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 70. [2020-10-13 04:38:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:38:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-10-13 04:38:28,165 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 34 [2020-10-13 04:38:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:28,165 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-10-13 04:38:28,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:38:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-10-13 04:38:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 04:38:28,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:28,167 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:28,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:38:28,167 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:28,167 INFO L82 PathProgramCache]: Analyzing trace with hash -735995168, now seen corresponding path program 11 times [2020-10-13 04:38:28,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:28,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972043212] [2020-10-13 04:38:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:28,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:28,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 04:38:28,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:28,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-10-13 04:38:28,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:28,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:38:28,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:28,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:38:28,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:28,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:28,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:28,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:28,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:28,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:28,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:28,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:28,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:28,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:28,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:28,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972043212] [2020-10-13 04:38:28,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:28,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:38:28,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180588551] [2020-10-13 04:38:28,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:38:28,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:28,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:38:28,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:38:28,854 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 15 states. [2020-10-13 04:38:29,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:29,534 INFO L93 Difference]: Finished difference Result 402 states and 542 transitions. [2020-10-13 04:38:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:38:29,534 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-13 04:38:29,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:29,537 INFO L225 Difference]: With dead ends: 402 [2020-10-13 04:38:29,537 INFO L226 Difference]: Without dead ends: 361 [2020-10-13 04:38:29,538 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 04:38:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-13 04:38:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 72. [2020-10-13 04:38:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:38:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-10-13 04:38:29,546 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 36 [2020-10-13 04:38:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:29,547 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-10-13 04:38:29,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:38:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-10-13 04:38:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 04:38:29,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:29,548 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:29,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:38:29,548 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:29,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1791945218, now seen corresponding path program 12 times [2020-10-13 04:38:29,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:29,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713173245] [2020-10-13 04:38:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:29,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:30,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 04:38:30,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:30,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 724 [2020-10-13 04:38:30,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:30,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:38:30,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:30,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:38:30,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:30,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:30,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:30,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:30,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:30,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:30,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:30,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:30,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713173245] [2020-10-13 04:38:30,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:30,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:38:30,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730397752] [2020-10-13 04:38:30,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:38:30,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:30,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:38:30,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:38:30,441 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 16 states. [2020-10-13 04:38:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:31,057 INFO L93 Difference]: Finished difference Result 428 states and 578 transitions. [2020-10-13 04:38:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:38:31,057 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-13 04:38:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:31,061 INFO L225 Difference]: With dead ends: 428 [2020-10-13 04:38:31,061 INFO L226 Difference]: Without dead ends: 387 [2020-10-13 04:38:31,064 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 04:38:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-13 04:38:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 74. [2020-10-13 04:38:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 04:38:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-10-13 04:38:31,077 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 38 [2020-10-13 04:38:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:31,077 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-10-13 04:38:31,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:38:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-10-13 04:38:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 04:38:31,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:31,079 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:31,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:38:31,079 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:31,079 INFO L82 PathProgramCache]: Analyzing trace with hash 191166628, now seen corresponding path program 13 times [2020-10-13 04:38:31,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:31,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664458366] [2020-10-13 04:38:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:31,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:31,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 04:38:31,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:31,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-13 04:38:31,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:31,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:38:31,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:31,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:38:31,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:32,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:32,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:32,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:32,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:32,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:32,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:32,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:32,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:32,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:32,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:32,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664458366] [2020-10-13 04:38:32,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:32,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:38:32,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299417081] [2020-10-13 04:38:32,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:38:32,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:32,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:38:32,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:38:32,031 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 17 states. [2020-10-13 04:38:32,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:32,817 INFO L93 Difference]: Finished difference Result 454 states and 614 transitions. [2020-10-13 04:38:32,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:38:32,818 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-13 04:38:32,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:32,821 INFO L225 Difference]: With dead ends: 454 [2020-10-13 04:38:32,821 INFO L226 Difference]: Without dead ends: 413 [2020-10-13 04:38:32,822 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 04:38:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-13 04:38:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 76. [2020-10-13 04:38:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:38:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-10-13 04:38:32,831 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 40 [2020-10-13 04:38:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:32,831 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-10-13 04:38:32,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:38:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-10-13 04:38:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:38:32,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:32,832 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:32,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:38:32,832 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:32,833 INFO L82 PathProgramCache]: Analyzing trace with hash -558766394, now seen corresponding path program 14 times [2020-10-13 04:38:32,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:32,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68267245] [2020-10-13 04:38:32,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:32,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:33,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:38:33,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:33,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-13 04:38:33,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:33,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:38:33,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:33,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:38:33,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:33,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:33,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:33,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:33,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:33,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:33,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:33,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:33,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:33,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:33,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:33,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68267245] [2020-10-13 04:38:33,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:33,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:38:33,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515232350] [2020-10-13 04:38:33,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:38:33,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:33,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:38:33,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:38:33,814 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 18 states. [2020-10-13 04:38:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:34,601 INFO L93 Difference]: Finished difference Result 480 states and 650 transitions. [2020-10-13 04:38:34,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:38:34,602 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-13 04:38:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:34,605 INFO L225 Difference]: With dead ends: 480 [2020-10-13 04:38:34,605 INFO L226 Difference]: Without dead ends: 439 [2020-10-13 04:38:34,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:38:34,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-13 04:38:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 78. [2020-10-13 04:38:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 04:38:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-10-13 04:38:34,617 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 42 [2020-10-13 04:38:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:34,619 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-10-13 04:38:34,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:38:34,619 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-10-13 04:38:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:38:34,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:34,620 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:34,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:38:34,621 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash 310105192, now seen corresponding path program 15 times [2020-10-13 04:38:34,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:34,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532219210] [2020-10-13 04:38:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:34,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:34,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:35,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:35,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:38:35,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:35,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 745 [2020-10-13 04:38:35,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:35,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:38:35,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:35,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:38:35,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:35,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:35,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:35,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:35,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:35,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:35,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:35,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:35,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:35,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:35,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:35,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:35,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532219210] [2020-10-13 04:38:35,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:35,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:38:35,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359492799] [2020-10-13 04:38:35,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:38:35,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:35,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:38:35,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:38:35,590 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 19 states. [2020-10-13 04:38:36,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:36,471 INFO L93 Difference]: Finished difference Result 506 states and 686 transitions. [2020-10-13 04:38:36,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:38:36,471 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-13 04:38:36,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:36,475 INFO L225 Difference]: With dead ends: 506 [2020-10-13 04:38:36,475 INFO L226 Difference]: Without dead ends: 465 [2020-10-13 04:38:36,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:38:36,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-13 04:38:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 80. [2020-10-13 04:38:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:38:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2020-10-13 04:38:36,486 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 44 [2020-10-13 04:38:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:36,486 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2020-10-13 04:38:36,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:38:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2020-10-13 04:38:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 04:38:36,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:36,487 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:36,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:38:36,488 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:36,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2072043914, now seen corresponding path program 16 times [2020-10-13 04:38:36,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:36,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277848254] [2020-10-13 04:38:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:36,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:36,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:37,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:37,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 04:38:37,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:37,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-10-13 04:38:37,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:37,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:38:37,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:37,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:38:37,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:37,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:37,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:37,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:37,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:37,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:37,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:37,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:37,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:37,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:37,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:37,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:37,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277848254] [2020-10-13 04:38:37,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:37,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:38:37,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226001383] [2020-10-13 04:38:37,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:38:37,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:37,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:38:37,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:38:37,614 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 20 states. [2020-10-13 04:38:38,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:38,437 INFO L93 Difference]: Finished difference Result 532 states and 722 transitions. [2020-10-13 04:38:38,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:38:38,438 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-13 04:38:38,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:38,441 INFO L225 Difference]: With dead ends: 532 [2020-10-13 04:38:38,442 INFO L226 Difference]: Without dead ends: 491 [2020-10-13 04:38:38,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:38:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-13 04:38:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 82. [2020-10-13 04:38:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:38:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-10-13 04:38:38,451 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 46 [2020-10-13 04:38:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:38,452 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-10-13 04:38:38,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:38:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-10-13 04:38:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 04:38:38,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:38,453 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:38,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:38:38,453 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:38,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:38,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1216926164, now seen corresponding path program 17 times [2020-10-13 04:38:38,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:38,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278577869] [2020-10-13 04:38:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:38,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:38,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:39,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 04:38:39,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:39,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-13 04:38:39,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:38:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:38:39,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:38:39,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:39,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:39,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:39,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:39,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:39,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:39,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:39,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:39,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:39,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:39,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278577869] [2020-10-13 04:38:39,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:39,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:38:39,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384384445] [2020-10-13 04:38:39,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:38:39,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:39,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:38:39,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:38:39,632 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 21 states. [2020-10-13 04:38:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:40,713 INFO L93 Difference]: Finished difference Result 558 states and 758 transitions. [2020-10-13 04:38:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:38:40,713 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-13 04:38:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:40,720 INFO L225 Difference]: With dead ends: 558 [2020-10-13 04:38:40,720 INFO L226 Difference]: Without dead ends: 517 [2020-10-13 04:38:40,722 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 04:38:40,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-13 04:38:40,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 84. [2020-10-13 04:38:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:38:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-13 04:38:40,735 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 48 [2020-10-13 04:38:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:40,735 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-13 04:38:40,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:38:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-13 04:38:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 04:38:40,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:40,736 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:40,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:38:40,737 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:40,737 INFO L82 PathProgramCache]: Analyzing trace with hash -821241266, now seen corresponding path program 18 times [2020-10-13 04:38:40,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:40,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730432069] [2020-10-13 04:38:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:40,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:40,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:41,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:41,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 04:38:41,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:41,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 984 [2020-10-13 04:38:41,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:41,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:38:41,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:41,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:38:41,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:41,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:41,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:41,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:41,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:41,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:41,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:41,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:41,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:41,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:41,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:41,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:42,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730432069] [2020-10-13 04:38:42,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:42,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:38:42,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602369693] [2020-10-13 04:38:42,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:38:42,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:42,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:38:42,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:38:42,005 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 22 states. [2020-10-13 04:38:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:42,885 INFO L93 Difference]: Finished difference Result 584 states and 794 transitions. [2020-10-13 04:38:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:38:42,886 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-13 04:38:42,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:42,890 INFO L225 Difference]: With dead ends: 584 [2020-10-13 04:38:42,890 INFO L226 Difference]: Without dead ends: 543 [2020-10-13 04:38:42,891 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 04:38:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-10-13 04:38:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 86. [2020-10-13 04:38:42,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 04:38:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-10-13 04:38:42,900 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 50 [2020-10-13 04:38:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:42,901 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-10-13 04:38:42,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:38:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-10-13 04:38:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:38:42,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:42,902 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:42,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:38:42,902 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:42,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1474823664, now seen corresponding path program 19 times [2020-10-13 04:38:42,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:42,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159197196] [2020-10-13 04:38:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:42,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:42,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:43,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:43,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:38:43,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:43,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-13 04:38:43,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:38:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:38:43,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:44,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:44,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:44,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:44,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:44,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:44,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:44,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:44,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:44,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:44,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:44,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159197196] [2020-10-13 04:38:44,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:44,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:38:44,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491751722] [2020-10-13 04:38:44,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:38:44,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:44,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:38:44,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:38:44,260 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 23 states. [2020-10-13 04:38:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:45,470 INFO L93 Difference]: Finished difference Result 610 states and 830 transitions. [2020-10-13 04:38:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:38:45,471 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-13 04:38:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:45,476 INFO L225 Difference]: With dead ends: 610 [2020-10-13 04:38:45,476 INFO L226 Difference]: Without dead ends: 569 [2020-10-13 04:38:45,477 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 04:38:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2020-10-13 04:38:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 88. [2020-10-13 04:38:45,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:38:45,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2020-10-13 04:38:45,491 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 52 [2020-10-13 04:38:45,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:45,491 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2020-10-13 04:38:45,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:38:45,492 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2020-10-13 04:38:45,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:38:45,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:45,492 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:45,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:38:45,493 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:45,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:45,493 INFO L82 PathProgramCache]: Analyzing trace with hash 380031250, now seen corresponding path program 20 times [2020-10-13 04:38:45,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:45,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435413830] [2020-10-13 04:38:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:45,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:45,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:46,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:46,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:38:46,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:46,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1180 [2020-10-13 04:38:46,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:46,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:38:46,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:46,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:38:46,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:47,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:47,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:47,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:47,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:47,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:47,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:47,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:47,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:47,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:47,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:47,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:47,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435413830] [2020-10-13 04:38:47,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:47,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:38:47,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679291640] [2020-10-13 04:38:47,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:38:47,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:47,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:38:47,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:38:47,074 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 24 states. [2020-10-13 04:38:48,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:48,418 INFO L93 Difference]: Finished difference Result 636 states and 866 transitions. [2020-10-13 04:38:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:38:48,419 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-13 04:38:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:48,423 INFO L225 Difference]: With dead ends: 636 [2020-10-13 04:38:48,424 INFO L226 Difference]: Without dead ends: 595 [2020-10-13 04:38:48,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:38:48,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-13 04:38:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 90. [2020-10-13 04:38:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 04:38:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2020-10-13 04:38:48,442 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 54 [2020-10-13 04:38:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:48,443 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2020-10-13 04:38:48,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:38:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2020-10-13 04:38:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:38:48,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:48,444 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:48,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:38:48,444 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash 551508916, now seen corresponding path program 21 times [2020-10-13 04:38:48,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:48,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182400845] [2020-10-13 04:38:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:48,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:48,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:50,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:50,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:38:50,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:50,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1612 [2020-10-13 04:38:50,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:50,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:38:50,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:50,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:38:50,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:50,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:50,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:50,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:50,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:50,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:50,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:50,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:50,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:50,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:50,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:50,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:50,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182400845] [2020-10-13 04:38:50,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:50,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:38:50,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794530806] [2020-10-13 04:38:50,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:38:50,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:50,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:38:50,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:38:50,419 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand 25 states. [2020-10-13 04:38:51,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:51,801 INFO L93 Difference]: Finished difference Result 662 states and 902 transitions. [2020-10-13 04:38:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:38:51,804 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-13 04:38:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:51,807 INFO L225 Difference]: With dead ends: 662 [2020-10-13 04:38:51,807 INFO L226 Difference]: Without dead ends: 621 [2020-10-13 04:38:51,808 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 04:38:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-13 04:38:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 92. [2020-10-13 04:38:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:38:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2020-10-13 04:38:51,818 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 56 [2020-10-13 04:38:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:51,818 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2020-10-13 04:38:51,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:38:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2020-10-13 04:38:51,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 04:38:51,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:51,819 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:51,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:38:51,819 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:51,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2132788694, now seen corresponding path program 22 times [2020-10-13 04:38:51,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:51,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103058752] [2020-10-13 04:38:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:51,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:51,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:52,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 04:38:52,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:52,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 901 [2020-10-13 04:38:52,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:38:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:38:52,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:53,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:53,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:53,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:53,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:53,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:53,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:53,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:53,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:53,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:53,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:53,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:53,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103058752] [2020-10-13 04:38:53,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:53,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:38:53,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810546332] [2020-10-13 04:38:53,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:38:53,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:53,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:38:53,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:38:53,058 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand 26 states. [2020-10-13 04:38:54,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:54,577 INFO L93 Difference]: Finished difference Result 688 states and 938 transitions. [2020-10-13 04:38:54,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:38:54,577 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-13 04:38:54,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:54,581 INFO L225 Difference]: With dead ends: 688 [2020-10-13 04:38:54,581 INFO L226 Difference]: Without dead ends: 647 [2020-10-13 04:38:54,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:38:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-10-13 04:38:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 94. [2020-10-13 04:38:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 04:38:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-10-13 04:38:54,612 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 58 [2020-10-13 04:38:54,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:54,613 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-10-13 04:38:54,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:38:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-10-13 04:38:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 04:38:54,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:54,614 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:54,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:38:54,614 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:54,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1324232568, now seen corresponding path program 23 times [2020-10-13 04:38:54,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:54,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606218016] [2020-10-13 04:38:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:54,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:54,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:55,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:55,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 04:38:55,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1077 [2020-10-13 04:38:55,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:38:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:38:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:56,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:56,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:56,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:56,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:56,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:56,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:56,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:56,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:56,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:56,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:56,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:56,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606218016] [2020-10-13 04:38:56,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:56,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:38:56,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550475378] [2020-10-13 04:38:56,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:38:56,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:56,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:38:56,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:38:56,093 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 27 states. [2020-10-13 04:38:57,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:57,737 INFO L93 Difference]: Finished difference Result 714 states and 974 transitions. [2020-10-13 04:38:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:38:57,738 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-13 04:38:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:57,741 INFO L225 Difference]: With dead ends: 714 [2020-10-13 04:38:57,741 INFO L226 Difference]: Without dead ends: 673 [2020-10-13 04:38:57,742 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 04:38:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2020-10-13 04:38:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 96. [2020-10-13 04:38:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:38:57,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-10-13 04:38:57,752 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 60 [2020-10-13 04:38:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:57,752 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-10-13 04:38:57,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:38:57,752 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-10-13 04:38:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 04:38:57,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:57,753 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:57,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:38:57,753 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:57,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1690876058, now seen corresponding path program 24 times [2020-10-13 04:38:57,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:57,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579808795] [2020-10-13 04:38:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:57,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:58,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:58,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:38:58,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:58,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1165 [2020-10-13 04:38:58,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:58,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:38:58,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:58,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:38:58,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:59,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:59,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:59,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:59,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:59,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:59,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:59,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:59,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:59,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:59,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:59,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:59,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579808795] [2020-10-13 04:38:59,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:59,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:38:59,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532650423] [2020-10-13 04:38:59,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:38:59,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:59,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:38:59,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:38:59,347 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 28 states. [2020-10-13 04:39:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:00,760 INFO L93 Difference]: Finished difference Result 740 states and 1010 transitions. [2020-10-13 04:39:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:39:00,761 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-13 04:39:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:00,764 INFO L225 Difference]: With dead ends: 740 [2020-10-13 04:39:00,764 INFO L226 Difference]: Without dead ends: 699 [2020-10-13 04:39:00,765 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 04:39:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-10-13 04:39:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 98. [2020-10-13 04:39:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 04:39:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-13 04:39:00,776 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 62 [2020-10-13 04:39:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:00,776 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-13 04:39:00,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:39:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-13 04:39:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 04:39:00,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:00,777 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:00,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:39:00,777 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:00,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:00,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1847951676, now seen corresponding path program 25 times [2020-10-13 04:39:00,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:00,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636299247] [2020-10-13 04:39:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:00,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:00,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:02,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:02,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 04:39:02,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:02,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1211 [2020-10-13 04:39:02,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:39:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:39:02,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:02,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:02,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:02,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:02,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:02,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:02,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:02,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:02,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:02,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:02,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:02,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:02,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636299247] [2020-10-13 04:39:02,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:02,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:39:02,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236442216] [2020-10-13 04:39:02,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:39:02,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:02,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:39:02,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:39:02,442 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 29 states. [2020-10-13 04:39:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:04,081 INFO L93 Difference]: Finished difference Result 766 states and 1046 transitions. [2020-10-13 04:39:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:39:04,082 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-13 04:39:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:04,085 INFO L225 Difference]: With dead ends: 766 [2020-10-13 04:39:04,086 INFO L226 Difference]: Without dead ends: 725 [2020-10-13 04:39:04,087 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 04:39:04,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2020-10-13 04:39:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 100. [2020-10-13 04:39:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:39:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-10-13 04:39:04,097 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 64 [2020-10-13 04:39:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:04,098 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-10-13 04:39:04,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:39:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-10-13 04:39:04,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:39:04,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:04,099 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:04,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:39:04,099 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:04,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1821202082, now seen corresponding path program 26 times [2020-10-13 04:39:04,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:04,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776550276] [2020-10-13 04:39:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:04,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:04,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:05,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:05,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:39:05,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:05,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1298 [2020-10-13 04:39:05,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:05,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:39:05,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:05,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:39:05,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:05,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:05,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:05,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:05,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:05,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:05,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:05,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:05,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:05,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:05,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:05,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:05,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776550276] [2020-10-13 04:39:05,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:05,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:39:05,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748030650] [2020-10-13 04:39:05,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:39:05,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:05,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:39:05,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:39:05,868 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 30 states. [2020-10-13 04:39:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:07,415 INFO L93 Difference]: Finished difference Result 792 states and 1082 transitions. [2020-10-13 04:39:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:39:07,416 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-13 04:39:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:07,419 INFO L225 Difference]: With dead ends: 792 [2020-10-13 04:39:07,419 INFO L226 Difference]: Without dead ends: 751 [2020-10-13 04:39:07,420 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 04:39:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2020-10-13 04:39:07,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 102. [2020-10-13 04:39:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:39:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2020-10-13 04:39:07,431 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 66 [2020-10-13 04:39:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:07,431 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2020-10-13 04:39:07,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:39:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2020-10-13 04:39:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:39:07,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:07,432 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:07,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:39:07,432 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:07,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1709813504, now seen corresponding path program 27 times [2020-10-13 04:39:07,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:07,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711825570] [2020-10-13 04:39:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:07,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:07,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:08,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:08,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:39:08,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:08,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-13 04:39:08,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:08,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:39:08,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:08,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:39:08,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:09,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:09,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:09,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:09,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:09,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:09,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:09,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:09,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:09,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:09,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:09,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:09,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711825570] [2020-10-13 04:39:09,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:09,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:39:09,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683777667] [2020-10-13 04:39:09,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:39:09,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:09,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:39:09,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:39:09,323 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand 31 states. [2020-10-13 04:39:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:11,276 INFO L93 Difference]: Finished difference Result 818 states and 1118 transitions. [2020-10-13 04:39:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:39:11,277 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-13 04:39:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:11,280 INFO L225 Difference]: With dead ends: 818 [2020-10-13 04:39:11,280 INFO L226 Difference]: Without dead ends: 777 [2020-10-13 04:39:11,281 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 04:39:11,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2020-10-13 04:39:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 104. [2020-10-13 04:39:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:39:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2020-10-13 04:39:11,292 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 68 [2020-10-13 04:39:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:11,292 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2020-10-13 04:39:11,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:39:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2020-10-13 04:39:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 04:39:11,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:11,293 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:11,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:39:11,293 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:11,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2039572446, now seen corresponding path program 28 times [2020-10-13 04:39:11,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:11,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87140573] [2020-10-13 04:39:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:11,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:11,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:12,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:12,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 04:39:12,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:12,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1590 [2020-10-13 04:39:12,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:12,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:39:12,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:12,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:39:12,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:13,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:13,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:13,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:13,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:13,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:13,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:13,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:13,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:13,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:13,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:13,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:13,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87140573] [2020-10-13 04:39:13,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:13,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:39:13,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309088933] [2020-10-13 04:39:13,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:39:13,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:13,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:39:13,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:39:13,418 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand 32 states. [2020-10-13 04:39:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:15,486 INFO L93 Difference]: Finished difference Result 844 states and 1154 transitions. [2020-10-13 04:39:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:39:15,487 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-13 04:39:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:15,490 INFO L225 Difference]: With dead ends: 844 [2020-10-13 04:39:15,491 INFO L226 Difference]: Without dead ends: 803 [2020-10-13 04:39:15,491 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 04:39:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2020-10-13 04:39:15,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 106. [2020-10-13 04:39:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 04:39:15,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2020-10-13 04:39:15,502 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 70 [2020-10-13 04:39:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:15,503 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2020-10-13 04:39:15,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:39:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2020-10-13 04:39:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:39:15,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:15,504 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:15,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:39:15,504 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:15,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1110335804, now seen corresponding path program 29 times [2020-10-13 04:39:15,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:15,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764785077] [2020-10-13 04:39:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:15,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:15,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:16,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:16,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 04:39:16,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:16,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1259 [2020-10-13 04:39:16,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:39:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:39:16,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:17,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:17,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:17,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:17,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:17,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:17,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:17,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:17,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:17,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:17,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:17,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:17,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764785077] [2020-10-13 04:39:17,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:17,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:39:17,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404696119] [2020-10-13 04:39:17,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:39:17,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:39:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:39:17,337 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand 33 states. [2020-10-13 04:39:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:19,116 INFO L93 Difference]: Finished difference Result 870 states and 1190 transitions. [2020-10-13 04:39:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:39:19,117 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-13 04:39:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:19,121 INFO L225 Difference]: With dead ends: 870 [2020-10-13 04:39:19,121 INFO L226 Difference]: Without dead ends: 829 [2020-10-13 04:39:19,122 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 04:39:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2020-10-13 04:39:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 108. [2020-10-13 04:39:19,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 04:39:19,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-10-13 04:39:19,133 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 72 [2020-10-13 04:39:19,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:19,133 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-10-13 04:39:19,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:39:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-10-13 04:39:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 04:39:19,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:19,134 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:19,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:39:19,135 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:19,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:19,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1467120410, now seen corresponding path program 30 times [2020-10-13 04:39:19,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:19,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900579004] [2020-10-13 04:39:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:19,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:19,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:20,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:20,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 04:39:20,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:20,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1279 [2020-10-13 04:39:20,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:20,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:39:20,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:20,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:39:20,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:21,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:21,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:21,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:21,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:21,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:21,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:21,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:21,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:21,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:21,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:21,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:21,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900579004] [2020-10-13 04:39:21,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:21,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:39:21,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804555479] [2020-10-13 04:39:21,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:39:21,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:21,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:39:21,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:39:21,080 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 34 states. [2020-10-13 04:39:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:23,230 INFO L93 Difference]: Finished difference Result 896 states and 1226 transitions. [2020-10-13 04:39:23,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:39:23,231 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-13 04:39:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:23,235 INFO L225 Difference]: With dead ends: 896 [2020-10-13 04:39:23,236 INFO L226 Difference]: Without dead ends: 855 [2020-10-13 04:39:23,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:39:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-10-13 04:39:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 110. [2020-10-13 04:39:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 04:39:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2020-10-13 04:39:23,248 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 74 [2020-10-13 04:39:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:23,248 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2020-10-13 04:39:23,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:39:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2020-10-13 04:39:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 04:39:23,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:23,249 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:23,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:39:23,250 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:23,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:23,250 INFO L82 PathProgramCache]: Analyzing trace with hash -739743096, now seen corresponding path program 31 times [2020-10-13 04:39:23,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:23,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709284855] [2020-10-13 04:39:23,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:23,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:23,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:24,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:24,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 04:39:24,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:24,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1637 [2020-10-13 04:39:24,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:24,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:39:24,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:24,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:39:24,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:25,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:25,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:25,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:25,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:25,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:25,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:25,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:25,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:25,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:25,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:25,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:25,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709284855] [2020-10-13 04:39:25,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:25,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:39:25,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76993246] [2020-10-13 04:39:25,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:39:25,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:25,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:39:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:39:25,544 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand 35 states. [2020-10-13 04:39:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:27,572 INFO L93 Difference]: Finished difference Result 922 states and 1262 transitions. [2020-10-13 04:39:27,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:39:27,573 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-13 04:39:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:27,577 INFO L225 Difference]: With dead ends: 922 [2020-10-13 04:39:27,577 INFO L226 Difference]: Without dead ends: 881 [2020-10-13 04:39:27,578 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 04:39:27,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2020-10-13 04:39:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 112. [2020-10-13 04:39:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:39:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-10-13 04:39:27,587 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 76 [2020-10-13 04:39:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:27,588 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-10-13 04:39:27,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:39:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-10-13 04:39:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:39:27,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:27,589 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:27,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:39:27,589 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:27,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1809813590, now seen corresponding path program 32 times [2020-10-13 04:39:27,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:27,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888263692] [2020-10-13 04:39:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:27,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:27,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:29,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:29,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:39:29,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:29,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1575 [2020-10-13 04:39:29,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:29,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:39:29,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:29,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 04:39:29,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:29,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:29,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:29,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:29,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:29,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:29,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:29,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:29,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:29,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:29,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:29,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:29,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888263692] [2020-10-13 04:39:29,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:29,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:39:29,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891617039] [2020-10-13 04:39:29,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:39:29,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:29,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:39:29,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:39:29,848 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 36 states. [2020-10-13 04:39:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:32,535 INFO L93 Difference]: Finished difference Result 948 states and 1298 transitions. [2020-10-13 04:39:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:39:32,535 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-13 04:39:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:32,539 INFO L225 Difference]: With dead ends: 948 [2020-10-13 04:39:32,540 INFO L226 Difference]: Without dead ends: 907 [2020-10-13 04:39:32,541 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 04:39:32,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2020-10-13 04:39:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 114. [2020-10-13 04:39:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 04:39:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2020-10-13 04:39:32,552 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 78 [2020-10-13 04:39:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:32,552 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2020-10-13 04:39:32,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:39:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2020-10-13 04:39:32,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:39:32,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:32,553 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:32,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:39:32,554 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:32,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:32,554 INFO L82 PathProgramCache]: Analyzing trace with hash 644592716, now seen corresponding path program 33 times [2020-10-13 04:39:32,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:32,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178561890] [2020-10-13 04:39:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:32,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:32,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:34,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:39:34,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:34,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1608 [2020-10-13 04:39:34,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:39:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:39:34,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:34,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:34,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:34,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:34,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:34,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:34,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:34,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:34,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178561890] [2020-10-13 04:39:34,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:34,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:39:34,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053032148] [2020-10-13 04:39:34,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:39:34,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:34,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:39:34,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:39:34,888 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 37 states. [2020-10-13 04:39:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:37,075 INFO L93 Difference]: Finished difference Result 974 states and 1334 transitions. [2020-10-13 04:39:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:39:37,076 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-13 04:39:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:37,080 INFO L225 Difference]: With dead ends: 974 [2020-10-13 04:39:37,081 INFO L226 Difference]: Without dead ends: 933 [2020-10-13 04:39:37,082 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 04:39:37,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2020-10-13 04:39:37,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 116. [2020-10-13 04:39:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 04:39:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2020-10-13 04:39:37,094 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 80 [2020-10-13 04:39:37,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:37,094 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2020-10-13 04:39:37,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:39:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2020-10-13 04:39:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:39:37,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:37,096 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:37,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:39:37,096 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:37,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1392007278, now seen corresponding path program 34 times [2020-10-13 04:39:37,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:37,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53582677] [2020-10-13 04:39:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:37,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:37,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:38,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:38,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:39:38,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:38,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1792 [2020-10-13 04:39:38,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:38,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:39:38,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:38,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 04:39:38,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:39,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:39,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:39,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:39,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:39,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:39,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:39,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:39,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:39,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:39,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:39,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:39,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:39,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53582677] [2020-10-13 04:39:39,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:39,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:39:39,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442478074] [2020-10-13 04:39:39,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:39:39,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:39,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:39:39,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:39:39,674 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 38 states. [2020-10-13 04:39:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:42,401 INFO L93 Difference]: Finished difference Result 1000 states and 1370 transitions. [2020-10-13 04:39:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:39:42,402 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-13 04:39:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:42,407 INFO L225 Difference]: With dead ends: 1000 [2020-10-13 04:39:42,407 INFO L226 Difference]: Without dead ends: 959 [2020-10-13 04:39:42,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:39:42,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2020-10-13 04:39:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 118. [2020-10-13 04:39:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:39:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2020-10-13 04:39:42,421 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 82 [2020-10-13 04:39:42,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:42,421 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2020-10-13 04:39:42,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:39:42,422 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2020-10-13 04:39:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:39:42,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:42,423 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:42,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:39:42,423 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:42,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:42,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1897104368, now seen corresponding path program 35 times [2020-10-13 04:39:42,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:42,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004080648] [2020-10-13 04:39:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:42,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:42,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:44,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:44,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:39:44,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:44,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1948 [2020-10-13 04:39:44,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:39:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 04:39:44,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:45,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:45,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:45,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:45,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:45,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:45,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:45,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:45,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:45,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:45,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:45,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:45,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004080648] [2020-10-13 04:39:45,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:45,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:39:45,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368201839] [2020-10-13 04:39:45,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:39:45,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:45,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:39:45,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:39:45,139 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 39 states. [2020-10-13 04:39:48,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:48,010 INFO L93 Difference]: Finished difference Result 1026 states and 1406 transitions. [2020-10-13 04:39:48,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:39:48,010 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-13 04:39:48,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:48,014 INFO L225 Difference]: With dead ends: 1026 [2020-10-13 04:39:48,014 INFO L226 Difference]: Without dead ends: 985 [2020-10-13 04:39:48,015 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 04:39:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2020-10-13 04:39:48,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 120. [2020-10-13 04:39:48,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 04:39:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2020-10-13 04:39:48,023 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 84 [2020-10-13 04:39:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:48,023 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2020-10-13 04:39:48,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:39:48,023 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2020-10-13 04:39:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 04:39:48,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:48,024 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:48,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:39:48,025 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:48,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:48,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1637466318, now seen corresponding path program 36 times [2020-10-13 04:39:48,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:48,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952223220] [2020-10-13 04:39:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:48,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:48,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:50,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:50,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 04:39:50,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:50,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2099 [2020-10-13 04:39:50,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:39:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 04:39:50,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:50,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:50,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:50,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:50,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:50,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:50,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:50,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:50,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:50,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952223220] [2020-10-13 04:39:50,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:50,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:39:50,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749099205] [2020-10-13 04:39:50,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:39:50,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:50,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:39:50,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:39:50,963 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand 40 states. [2020-10-13 04:39:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:54,247 INFO L93 Difference]: Finished difference Result 1052 states and 1442 transitions. [2020-10-13 04:39:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:39:54,248 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-13 04:39:54,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:54,252 INFO L225 Difference]: With dead ends: 1052 [2020-10-13 04:39:54,252 INFO L226 Difference]: Without dead ends: 1011 [2020-10-13 04:39:54,253 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 04:39:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2020-10-13 04:39:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 122. [2020-10-13 04:39:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 04:39:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-10-13 04:39:54,263 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 86 [2020-10-13 04:39:54,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:54,264 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-10-13 04:39:54,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:39:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-10-13 04:39:54,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 04:39:54,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:54,265 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:54,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:39:54,266 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:54,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:54,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1233403436, now seen corresponding path program 37 times [2020-10-13 04:39:54,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:54,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409882981] [2020-10-13 04:39:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:54,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:54,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:56,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:56,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 04:39:56,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:56,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2257 [2020-10-13 04:39:56,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:56,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:39:56,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:56,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 04:39:56,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:57,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:57,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:57,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:57,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:57,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:57,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:57,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:57,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:57,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:57,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:57,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:57,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409882981] [2020-10-13 04:39:57,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:57,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:39:57,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561167364] [2020-10-13 04:39:57,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:39:57,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:57,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:39:57,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:39:57,456 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 41 states. [2020-10-13 04:40:00,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:00,172 INFO L93 Difference]: Finished difference Result 1078 states and 1478 transitions. [2020-10-13 04:40:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:40:00,173 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-13 04:40:00,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:00,178 INFO L225 Difference]: With dead ends: 1078 [2020-10-13 04:40:00,178 INFO L226 Difference]: Without dead ends: 1037 [2020-10-13 04:40:00,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:40:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2020-10-13 04:40:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 124. [2020-10-13 04:40:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 04:40:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2020-10-13 04:40:00,190 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 88 [2020-10-13 04:40:00,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:00,191 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2020-10-13 04:40:00,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:40:00,191 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2020-10-13 04:40:00,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 04:40:00,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:00,192 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:00,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:40:00,192 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:00,193 INFO L82 PathProgramCache]: Analyzing trace with hash 523969526, now seen corresponding path program 38 times [2020-10-13 04:40:00,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:00,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158248754] [2020-10-13 04:40:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:00,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:00,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:02,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:02,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 04:40:02,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:02,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2425 [2020-10-13 04:40:02,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:02,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:40:02,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:02,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 04:40:02,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:03,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:03,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:03,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:03,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:03,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:03,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:03,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:03,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:03,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:03,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:03,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:03,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158248754] [2020-10-13 04:40:03,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:03,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:40:03,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730467424] [2020-10-13 04:40:03,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:40:03,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:03,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:40:03,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:40:03,558 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 42 states. [2020-10-13 04:40:07,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:07,199 INFO L93 Difference]: Finished difference Result 1104 states and 1514 transitions. [2020-10-13 04:40:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:40:07,200 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-13 04:40:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:07,205 INFO L225 Difference]: With dead ends: 1104 [2020-10-13 04:40:07,206 INFO L226 Difference]: Without dead ends: 1063 [2020-10-13 04:40:07,207 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 04:40:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2020-10-13 04:40:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 126. [2020-10-13 04:40:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 04:40:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2020-10-13 04:40:07,218 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 90 [2020-10-13 04:40:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:07,219 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2020-10-13 04:40:07,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:40:07,219 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2020-10-13 04:40:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:40:07,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:07,220 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:07,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:40:07,220 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:07,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1437238680, now seen corresponding path program 39 times [2020-10-13 04:40:07,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:07,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791008952] [2020-10-13 04:40:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:07,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:07,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:09,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:09,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:40:09,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:09,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2534 [2020-10-13 04:40:09,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:09,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:40:09,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:09,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 04:40:09,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:10,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:10,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:10,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:10,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:10,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:10,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:10,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:10,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:10,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:10,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:10,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:10,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791008952] [2020-10-13 04:40:10,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:10,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:40:10,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14266837] [2020-10-13 04:40:10,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:40:10,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:40:10,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:40:10,763 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand 43 states. [2020-10-13 04:40:14,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:14,575 INFO L93 Difference]: Finished difference Result 1130 states and 1550 transitions. [2020-10-13 04:40:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:40:14,575 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-13 04:40:14,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:14,580 INFO L225 Difference]: With dead ends: 1130 [2020-10-13 04:40:14,580 INFO L226 Difference]: Without dead ends: 1089 [2020-10-13 04:40:14,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:40:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2020-10-13 04:40:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 128. [2020-10-13 04:40:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:40:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2020-10-13 04:40:14,591 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 92 [2020-10-13 04:40:14,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:14,592 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2020-10-13 04:40:14,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:40:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2020-10-13 04:40:14,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 04:40:14,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:14,593 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:14,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:40:14,593 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:14,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1379400006, now seen corresponding path program 40 times [2020-10-13 04:40:14,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:14,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900841107] [2020-10-13 04:40:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:14,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:14,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:17,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:17,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 04:40:17,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:17,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2750 [2020-10-13 04:40:17,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:17,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:40:17,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:17,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 04:40:17,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:18,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:18,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:18,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:18,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:18,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:18,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:18,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:18,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:18,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:18,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:18,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:18,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900841107] [2020-10-13 04:40:18,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:18,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 04:40:18,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023037150] [2020-10-13 04:40:18,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 04:40:18,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 04:40:18,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:40:18,355 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand 44 states. [2020-10-13 04:40:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:22,178 INFO L93 Difference]: Finished difference Result 1156 states and 1586 transitions. [2020-10-13 04:40:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:40:22,179 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-13 04:40:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:22,185 INFO L225 Difference]: With dead ends: 1156 [2020-10-13 04:40:22,185 INFO L226 Difference]: Without dead ends: 1115 [2020-10-13 04:40:22,187 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 04:40:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2020-10-13 04:40:22,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 130. [2020-10-13 04:40:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 04:40:22,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2020-10-13 04:40:22,200 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 94 [2020-10-13 04:40:22,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:22,201 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2020-10-13 04:40:22,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 04:40:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2020-10-13 04:40:22,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 04:40:22,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:22,202 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:22,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:40:22,202 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:22,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:22,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1955186524, now seen corresponding path program 41 times [2020-10-13 04:40:22,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:22,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015060925] [2020-10-13 04:40:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:22,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:22,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:25,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:25,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 04:40:25,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:25,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2897 [2020-10-13 04:40:25,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 04:40:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 04:40:25,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:26,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:26,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:26,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:26,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:26,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:26,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:26,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:26,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:26,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:26,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:26,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:26,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015060925] [2020-10-13 04:40:26,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:26,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 04:40:26,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571117346] [2020-10-13 04:40:26,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 04:40:26,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:26,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 04:40:26,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:40:26,184 INFO L87 Difference]: Start difference. First operand 130 states and 140 transitions. Second operand 45 states. [2020-10-13 04:40:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:30,372 INFO L93 Difference]: Finished difference Result 1182 states and 1622 transitions. [2020-10-13 04:40:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:40:30,373 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-13 04:40:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:30,379 INFO L225 Difference]: With dead ends: 1182 [2020-10-13 04:40:30,380 INFO L226 Difference]: Without dead ends: 1141 [2020-10-13 04:40:30,381 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 04:40:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2020-10-13 04:40:30,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 132. [2020-10-13 04:40:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 04:40:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2020-10-13 04:40:30,394 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 96 [2020-10-13 04:40:30,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:30,395 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2020-10-13 04:40:30,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 04:40:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2020-10-13 04:40:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 04:40:30,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:30,396 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:30,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:40:30,396 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:30,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1847728258, now seen corresponding path program 42 times [2020-10-13 04:40:30,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:30,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614996673] [2020-10-13 04:40:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:30,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:30,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:33,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:33,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 04:40:33,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:33,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3204 [2020-10-13 04:40:33,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:33,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 04:40:33,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:33,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 04:40:33,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:34,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:34,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:34,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:34,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:34,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:34,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:34,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:34,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:34,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:34,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:34,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:34,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614996673] [2020-10-13 04:40:34,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:34,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 04:40:34,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956747186] [2020-10-13 04:40:34,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 04:40:34,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 04:40:34,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:40:34,753 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand 46 states. [2020-10-13 04:40:39,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:39,233 INFO L93 Difference]: Finished difference Result 1208 states and 1658 transitions. [2020-10-13 04:40:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 04:40:39,233 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-13 04:40:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:39,239 INFO L225 Difference]: With dead ends: 1208 [2020-10-13 04:40:39,239 INFO L226 Difference]: Without dead ends: 1167 [2020-10-13 04:40:39,241 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 04:40:39,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2020-10-13 04:40:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 134. [2020-10-13 04:40:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 04:40:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2020-10-13 04:40:39,263 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 98 [2020-10-13 04:40:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:39,266 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2020-10-13 04:40:39,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 04:40:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2020-10-13 04:40:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 04:40:39,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:39,268 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:39,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:40:39,268 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:39,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1431664864, now seen corresponding path program 43 times [2020-10-13 04:40:39,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:39,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033898951] [2020-10-13 04:40:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:39,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:39,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:42,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:42,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 04:40:42,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:42,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3646 [2020-10-13 04:40:42,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 04:40:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 04:40:42,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:44,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:44,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:44,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:44,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:44,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:44,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:44,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:44,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:44,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:44,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:44,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:44,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033898951] [2020-10-13 04:40:44,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:44,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 04:40:44,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721268115] [2020-10-13 04:40:44,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 04:40:44,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:44,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 04:40:44,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:40:44,156 INFO L87 Difference]: Start difference. First operand 134 states and 144 transitions. Second operand 47 states. [2020-10-13 04:40:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:48,268 INFO L93 Difference]: Finished difference Result 1234 states and 1694 transitions. [2020-10-13 04:40:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 04:40:48,269 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-13 04:40:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:48,273 INFO L225 Difference]: With dead ends: 1234 [2020-10-13 04:40:48,274 INFO L226 Difference]: Without dead ends: 1193 [2020-10-13 04:40:48,275 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 04:40:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2020-10-13 04:40:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 136. [2020-10-13 04:40:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:40:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2020-10-13 04:40:48,288 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 100 [2020-10-13 04:40:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:48,289 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2020-10-13 04:40:48,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 04:40:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2020-10-13 04:40:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:40:48,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:48,290 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:48,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:40:48,290 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:48,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:48,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1026701758, now seen corresponding path program 44 times [2020-10-13 04:40:48,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:48,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316367939] [2020-10-13 04:40:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:48,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:48,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:52,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:52,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:40:52,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:52,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4048 [2020-10-13 04:40:52,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:52,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 04:40:52,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:52,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 04:40:52,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:53,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:53,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:53,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:53,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:53,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:53,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:40:53,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:53,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:53,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:53,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:53,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:53,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316367939] [2020-10-13 04:40:53,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:53,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 04:40:53,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998290447] [2020-10-13 04:40:53,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 04:40:53,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:53,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 04:40:53,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:40:53,610 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand 48 states. [2020-10-13 04:40:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:58,839 INFO L93 Difference]: Finished difference Result 1260 states and 1730 transitions. [2020-10-13 04:40:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 04:40:58,839 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-13 04:40:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:58,844 INFO L225 Difference]: With dead ends: 1260 [2020-10-13 04:40:58,844 INFO L226 Difference]: Without dead ends: 1219 [2020-10-13 04:40:58,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 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 04:40:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2020-10-13 04:40:58,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 138. [2020-10-13 04:40:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 04:40:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2020-10-13 04:40:58,861 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 102 [2020-10-13 04:40:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:58,861 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2020-10-13 04:40:58,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 04:40:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2020-10-13 04:40:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 04:40:58,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:58,862 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:58,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:40:58,862 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:58,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:58,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1595786468, now seen corresponding path program 45 times [2020-10-13 04:40:58,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:58,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079764643] [2020-10-13 04:40:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:58,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:58,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:03,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:03,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 04:41:03,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:03,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4256 [2020-10-13 04:41:03,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:03,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 04:41:03,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:03,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 04:41:03,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:04,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:04,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:04,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:04,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:04,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:04,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:41:04,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:04,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:04,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:04,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:04,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:04,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079764643] [2020-10-13 04:41:04,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:04,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 04:41:04,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408096220] [2020-10-13 04:41:04,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 04:41:04,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:04,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 04:41:04,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:41:04,534 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand 49 states. [2020-10-13 04:41:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:09,663 INFO L93 Difference]: Finished difference Result 1286 states and 1766 transitions. [2020-10-13 04:41:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 04:41:09,664 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-13 04:41:09,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:09,668 INFO L225 Difference]: With dead ends: 1286 [2020-10-13 04:41:09,668 INFO L226 Difference]: Without dead ends: 1245 [2020-10-13 04:41:09,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:41:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2020-10-13 04:41:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 140. [2020-10-13 04:41:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:41:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2020-10-13 04:41:09,680 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 104 [2020-10-13 04:41:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:09,680 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2020-10-13 04:41:09,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 04:41:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2020-10-13 04:41:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 04:41:09,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:09,681 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:09,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:41:09,682 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:09,682 INFO L82 PathProgramCache]: Analyzing trace with hash 661168902, now seen corresponding path program 46 times [2020-10-13 04:41:09,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:09,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334135528] [2020-10-13 04:41:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:09,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:09,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:14,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:14,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 04:41:14,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:14,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4315 [2020-10-13 04:41:14,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 04:41:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 04:41:14,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:15,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:15,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:15,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:15,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:15,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:15,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:15,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:15,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:15,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334135528] [2020-10-13 04:41:15,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:15,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 04:41:15,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825162077] [2020-10-13 04:41:15,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 04:41:15,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:15,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 04:41:15,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 04:41:15,360 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 50 states. [2020-10-13 04:41:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:19,155 INFO L93 Difference]: Finished difference Result 1312 states and 1802 transitions. [2020-10-13 04:41:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 04:41:19,156 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 106 [2020-10-13 04:41:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:19,159 INFO L225 Difference]: With dead ends: 1312 [2020-10-13 04:41:19,159 INFO L226 Difference]: Without dead ends: 1271 [2020-10-13 04:41:19,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 04:41:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2020-10-13 04:41:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 142. [2020-10-13 04:41:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:41:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2020-10-13 04:41:19,176 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 106 [2020-10-13 04:41:19,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:19,176 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2020-10-13 04:41:19,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 04:41:19,176 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2020-10-13 04:41:19,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 04:41:19,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:19,177 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:19,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:41:19,178 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:19,178 INFO L82 PathProgramCache]: Analyzing trace with hash 141852840, now seen corresponding path program 47 times [2020-10-13 04:41:19,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:19,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896078519] [2020-10-13 04:41:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:19,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:19,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:23,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:23,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 04:41:23,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:23,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4696 [2020-10-13 04:41:23,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:23,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 04:41:23,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:23,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 04:41:23,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:25,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:25,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:25,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:25,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:25,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:25,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:25,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:25,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:25,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:25,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:25,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:25,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896078519] [2020-10-13 04:41:25,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:25,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 04:41:25,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515637910] [2020-10-13 04:41:25,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 04:41:25,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:25,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 04:41:25,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 04:41:25,318 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand 51 states. [2020-10-13 04:41:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:29,191 INFO L93 Difference]: Finished difference Result 1338 states and 1838 transitions. [2020-10-13 04:41:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 04:41:29,192 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 108 [2020-10-13 04:41:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:29,204 INFO L225 Difference]: With dead ends: 1338 [2020-10-13 04:41:29,205 INFO L226 Difference]: Without dead ends: 1297 [2020-10-13 04:41:29,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 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 04:41:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2020-10-13 04:41:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 144. [2020-10-13 04:41:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 04:41:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-10-13 04:41:29,221 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 108 [2020-10-13 04:41:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:29,221 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-10-13 04:41:29,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 04:41:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-10-13 04:41:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 04:41:29,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:29,222 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:29,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:41:29,225 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:29,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:29,226 INFO L82 PathProgramCache]: Analyzing trace with hash -704676406, now seen corresponding path program 48 times [2020-10-13 04:41:29,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:29,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5358133] [2020-10-13 04:41:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:29,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:29,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:34,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:34,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 04:41:34,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:34,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:41:34,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:34,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 04:41:34,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:34,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 04:41:34,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:35,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:35,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:35,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:35,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:35,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:35,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:35,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:35,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:35,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:35,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:35,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:35,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5358133] [2020-10-13 04:41:35,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:35,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 04:41:35,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371391795] [2020-10-13 04:41:35,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 04:41:35,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:35,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 04:41:35,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 04:41:35,836 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 52 states. [2020-10-13 04:41:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:40,406 INFO L93 Difference]: Finished difference Result 1364 states and 1874 transitions. [2020-10-13 04:41:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 04:41:40,406 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 110 [2020-10-13 04:41:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:40,412 INFO L225 Difference]: With dead ends: 1364 [2020-10-13 04:41:40,413 INFO L226 Difference]: Without dead ends: 1323 [2020-10-13 04:41:40,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 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 04:41:40,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2020-10-13 04:41:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 146. [2020-10-13 04:41:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 04:41:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2020-10-13 04:41:40,433 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 110 [2020-10-13 04:41:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:40,434 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2020-10-13 04:41:40,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 04:41:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2020-10-13 04:41:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 04:41:40,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:40,435 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:40,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 04:41:40,435 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:40,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:40,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1824504428, now seen corresponding path program 49 times [2020-10-13 04:41:40,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:40,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993611883] [2020-10-13 04:41:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:40,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:40,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:45,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:45,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 04:41:45,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:45,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 04:41:45,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:45,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 04:41:45,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:45,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-13 04:41:45,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:47,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:47,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:47,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:47,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:47,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:47,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:47,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:47,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:47,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:47,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:47,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:47,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993611883] [2020-10-13 04:41:47,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:47,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 04:41:47,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499754656] [2020-10-13 04:41:47,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 04:41:47,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:47,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 04:41:47,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 04:41:47,198 INFO L87 Difference]: Start difference. First operand 146 states and 156 transitions. Second operand 53 states. [2020-10-13 04:41:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:53,809 INFO L93 Difference]: Finished difference Result 1390 states and 1910 transitions. [2020-10-13 04:41:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 04:41:53,809 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 112 [2020-10-13 04:41:53,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:53,814 INFO L225 Difference]: With dead ends: 1390 [2020-10-13 04:41:53,814 INFO L226 Difference]: Without dead ends: 1349 [2020-10-13 04:41:53,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 04:41:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2020-10-13 04:41:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 148. [2020-10-13 04:41:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 04:41:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2020-10-13 04:41:53,838 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 112 [2020-10-13 04:41:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:53,838 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2020-10-13 04:41:53,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 04:41:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2020-10-13 04:41:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 04:41:53,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:53,839 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:53,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 04:41:53,840 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:53,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1415796366, now seen corresponding path program 50 times [2020-10-13 04:41:53,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:53,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922835761] [2020-10-13 04:41:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:53,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:54,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:58,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:58,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 04:41:58,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:58,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:41:58,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:58,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 04:41:58,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:58,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-13 04:41:58,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:00,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:00,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:00,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:00,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:00,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:00,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:00,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:00,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:00,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:00,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:42:00,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922835761] [2020-10-13 04:42:00,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:00,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 04:42:00,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962223880] [2020-10-13 04:42:00,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 04:42:00,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:00,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 04:42:00,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 04:42:00,532 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand 54 states. [2020-10-13 04:42:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:06,777 INFO L93 Difference]: Finished difference Result 1416 states and 1946 transitions. [2020-10-13 04:42:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 04:42:06,778 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 114 [2020-10-13 04:42:06,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:06,782 INFO L225 Difference]: With dead ends: 1416 [2020-10-13 04:42:06,783 INFO L226 Difference]: Without dead ends: 1375 [2020-10-13 04:42:06,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 04:42:06,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2020-10-13 04:42:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 150. [2020-10-13 04:42:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 04:42:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2020-10-13 04:42:06,799 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 114 [2020-10-13 04:42:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:06,799 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2020-10-13 04:42:06,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 04:42:06,800 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2020-10-13 04:42:06,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 04:42:06,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:06,801 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:06,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 04:42:06,801 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:06,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:06,801 INFO L82 PathProgramCache]: Analyzing trace with hash -510627280, now seen corresponding path program 51 times [2020-10-13 04:42:06,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:06,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786436532] [2020-10-13 04:42:06,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:11,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:11,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 04:42:11,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:11,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:42:11,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:11,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 04:42:11,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:11,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 04:42:11,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:13,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:13,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:13,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:13,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:13,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:13,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:13,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:13,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:13,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:13,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:13,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:42:13,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786436532] [2020-10-13 04:42:13,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:13,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 04:42:13,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476387925] [2020-10-13 04:42:13,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 04:42:13,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:13,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 04:42:13,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 04:42:13,550 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand 55 states.