/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=BIGGEST --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/loop-simple/deep-nested.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:22:29,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:22:29,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:22:29,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:22:29,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:22:29,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:22:29,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:22:29,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:22:29,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:22:29,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:22:29,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:22:29,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:22:29,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:22:29,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:22:29,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:22:29,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:22:29,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:22:29,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:22:29,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:22:29,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:22:29,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:22:29,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:22:29,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:22:29,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:22:29,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:22:29,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:22:29,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:22:29,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:22:29,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:22:29,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:22:29,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:22:29,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:22:29,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:22:29,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:22:29,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:22:29,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:22:29,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:22:29,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:22:29,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:22:29,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:22:29,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:22:29,477 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 [2020-10-12 16:22:29,519 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:22:29,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:22:29,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:22:29,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:22:29,522 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:22:29,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:22:29,522 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:22:29,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:22:29,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:22:29,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:22:29,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:22:29,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:22:29,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:22:29,524 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:22:29,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:22:29,526 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:22:29,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:22:29,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:22:29,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:22:29,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:22:29,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:22:29,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:22:29,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:22:29,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:22:29,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:22:29,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:22:29,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:22:29,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:22:29,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:22:29,528 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:22:29,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:22:29,823 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:22:29,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:22:29,828 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:22:29,828 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:22:29,829 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/deep-nested.c [2020-10-12 16:22:29,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d27ea37f/517fe4f5f7b34696b4910ce27357771f/FLAGc4917df43 [2020-10-12 16:22:30,319 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:22:30,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-simple/deep-nested.c [2020-10-12 16:22:30,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d27ea37f/517fe4f5f7b34696b4910ce27357771f/FLAGc4917df43 [2020-10-12 16:22:30,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d27ea37f/517fe4f5f7b34696b4910ce27357771f [2020-10-12 16:22:30,765 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:22:30,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:22:30,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:22:30,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:22:30,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:22:30,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:22:30" (1/1) ... [2020-10-12 16:22:30,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@709958c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:22:30, skipping insertion in model container [2020-10-12 16:22:30,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:22:30" (1/1) ... [2020-10-12 16:22:30,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:22:30,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:22:30,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:22:30,963 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:22:30,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:22:30,995 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:22:30,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:22:30 WrapperNode [2020-10-12 16:22:30,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:22:30,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:22:30,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:22:30,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:22:31,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:22:30" (1/1) ... [2020-10-12 16:22:31,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:22:30" (1/1) ... [2020-10-12 16:22:31,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:22:30" (1/1) ... [2020-10-12 16:22:31,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:22:30" (1/1) ... [2020-10-12 16:22:31,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:22:30" (1/1) ... [2020-10-12 16:22:31,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:22:30" (1/1) ... [2020-10-12 16:22:31,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:22:30" (1/1) ... [2020-10-12 16:22:31,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:22:31,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:22:31,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:22:31,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:22:31,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:22:30" (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 [2020-10-12 16:22:31,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:22:31,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:22:31,173 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:22:31,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:22:31,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:22:31,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:22:31,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:22:31,387 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:22:31,388 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 16:22:31,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:22:31 BoogieIcfgContainer [2020-10-12 16:22:31,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:22:31,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:22:31,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:22:31,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:22:31,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:22:30" (1/3) ... [2020-10-12 16:22:31,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63966135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:22:31, skipping insertion in model container [2020-10-12 16:22:31,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:22:30" (2/3) ... [2020-10-12 16:22:31,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63966135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:22:31, skipping insertion in model container [2020-10-12 16:22:31,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:22:31" (3/3) ... [2020-10-12 16:22:31,399 INFO L109 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2020-10-12 16:22:31,409 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:22:31,416 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:22:31,428 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:22:31,448 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:22:31,449 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:22:31,449 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:22:31,449 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:22:31,449 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:22:31,449 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:22:31,449 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:22:31,450 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:22:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-12 16:22:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 16:22:31,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:31,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:31,472 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:31,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:31,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1946324144, now seen corresponding path program 1 times [2020-10-12 16:22:31,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:31,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035348721] [2020-10-12 16:22:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:31,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:31,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:31,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:22:31,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:31,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-12 16:22:31,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:31,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:31,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:22:31,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:22:31,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 16:22:31,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:31,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:31,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:31,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:31,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:31,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:22:31,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:31,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:31,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:31,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:31,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 16:22:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:31,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035348721] [2020-10-12 16:22:31,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:22:31,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 16:22:31,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670065755] [2020-10-12 16:22:31,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 16:22:31,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:32,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 16:22:32,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:22:32,010 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-12 16:22:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:32,136 INFO L93 Difference]: Finished difference Result 55 states and 86 transitions. [2020-10-12 16:22:32,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 16:22:32,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-12 16:22:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:32,149 INFO L225 Difference]: With dead ends: 55 [2020-10-12 16:22:32,149 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 16:22:32,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:22:32,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 16:22:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-12 16:22:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:22:32,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-12 16:22:32,198 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 12 [2020-10-12 16:22:32,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:32,199 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-12 16:22:32,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 16:22:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-12 16:22:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:22:32,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:32,200 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:32,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:22:32,201 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:32,202 INFO L82 PathProgramCache]: Analyzing trace with hash 641398635, now seen corresponding path program 1 times [2020-10-12 16:22:32,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:32,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795784604] [2020-10-12 16:22:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:32,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:32,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:32,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:32,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:32,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:32,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:32,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:32,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:32,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:32,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:32,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:32,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:22:32,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 16:22:32,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-12 16:22:32,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:32,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:22:32,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:22:32,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:22:32,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:22:32,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:32,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:32,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:32,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:33,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:33,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:22:33,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:33,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:33,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:33,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:33,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:33,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795784604] [2020-10-12 16:22:33,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:33,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:22:33,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977482755] [2020-10-12 16:22:33,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:22:33,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:33,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:22:33,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:22:33,015 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 5 states. [2020-10-12 16:22:33,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:33,237 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-10-12 16:22:33,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:22:33,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-12 16:22:33,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:33,240 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:22:33,240 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 16:22:33,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:22:33,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 16:22:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-10-12 16:22:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:22:33,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2020-10-12 16:22:33,254 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 15 [2020-10-12 16:22:33,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:33,254 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2020-10-12 16:22:33,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:22:33,254 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-10-12 16:22:33,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:22:33,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:33,256 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:33,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:22:33,256 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:33,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:33,257 INFO L82 PathProgramCache]: Analyzing trace with hash -398877791, now seen corresponding path program 1 times [2020-10-12 16:22:33,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:33,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202585833] [2020-10-12 16:22:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:33,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:34,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:22:34,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-12 16:22:34,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1079 [2020-10-12 16:22:34,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:34,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:22:34,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:22:34,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:22:34,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:34,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:34,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:34,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:34,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:34,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:34,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:34,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:34,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:34,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:34,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:22:34,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202585833] [2020-10-12 16:22:34,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:34,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:22:34,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419529041] [2020-10-12 16:22:34,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:22:34,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:34,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:22:34,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:22:34,431 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 5 states. [2020-10-12 16:22:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:34,612 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2020-10-12 16:22:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:22:34,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-12 16:22:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:34,615 INFO L225 Difference]: With dead ends: 64 [2020-10-12 16:22:34,615 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:22:34,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:22:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:22:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-12 16:22:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 16:22:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-12 16:22:34,629 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 18 [2020-10-12 16:22:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:34,630 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-12 16:22:34,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:22:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-12 16:22:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:22:34,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:34,631 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:34,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:22:34,632 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:34,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1210123179, now seen corresponding path program 2 times [2020-10-12 16:22:34,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:34,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412776239] [2020-10-12 16:22:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:34,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:35,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:37,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:37,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:22:37,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 33 [2020-10-12 16:22:37,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3241 [2020-10-12 16:22:37,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:37,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:22:37,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:22:37,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:22:37,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:37,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:37,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:37,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:37,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:37,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:37,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:37,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:37,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:22:37,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412776239] [2020-10-12 16:22:37,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:37,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:22:37,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222311455] [2020-10-12 16:22:37,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:22:37,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:37,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:22:37,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:22:37,979 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 6 states. [2020-10-12 16:22:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:38,197 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2020-10-12 16:22:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:22:38,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-12 16:22:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:38,200 INFO L225 Difference]: With dead ends: 85 [2020-10-12 16:22:38,200 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 16:22:38,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:22:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 16:22:38,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-10-12 16:22:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:22:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-10-12 16:22:38,215 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 21 [2020-10-12 16:22:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:38,215 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-10-12 16:22:38,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:22:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-10-12 16:22:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:22:38,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:38,217 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:38,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:22:38,217 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:38,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:38,218 INFO L82 PathProgramCache]: Analyzing trace with hash -964787384, now seen corresponding path program 1 times [2020-10-12 16:22:38,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:38,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856762807] [2020-10-12 16:22:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:38,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:38,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:43,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:43,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:22:43,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-12 16:22:43,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:22:43,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:43,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:22:43,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:22:43,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:22:43,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:22:43,677 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-12 16:22:43,879 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-12 16:22:44,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:44,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:44,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:44,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:44,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:44,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:44,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:44,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:44,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:44,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:44,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:22:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:22:44,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856762807] [2020-10-12 16:22:44,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:44,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:22:44,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884196509] [2020-10-12 16:22:44,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:22:44,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:44,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:22:44,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:22:44,034 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 8 states. [2020-10-12 16:22:44,266 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-12 16:22:44,548 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-12 16:22:44,899 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-12 16:22:45,320 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-10-12 16:22:45,767 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-12 16:22:45,998 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-12 16:22:46,396 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-12 16:22:46,726 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-12 16:22:46,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:46,799 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2020-10-12 16:22:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:22:46,800 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-12 16:22:46,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:46,802 INFO L225 Difference]: With dead ends: 102 [2020-10-12 16:22:46,804 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 16:22:46,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:22:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 16:22:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 58. [2020-10-12 16:22:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 16:22:46,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-10-12 16:22:46,848 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 24 [2020-10-12 16:22:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:46,849 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-10-12 16:22:46,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:22:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-10-12 16:22:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:22:46,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:46,852 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:46,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:22:46,853 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:46,853 INFO L82 PathProgramCache]: Analyzing trace with hash 151257739, now seen corresponding path program 2 times [2020-10-12 16:22:46,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:46,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5144963] [2020-10-12 16:22:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:46,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:46,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:46,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:48,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:48,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:48,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:48,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:48,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:48,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:48,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:48,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:48,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:48,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:48,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:51,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:51,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:22:51,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 36 [2020-10-12 16:22:51,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 16:22:51,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:51,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:22:51,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:51,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:22:51,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:51,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:51,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:51,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:51,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:51,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:51,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:51,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:51,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:51,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 16:22:52,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5144963] [2020-10-12 16:22:52,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:52,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:22:52,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086163423] [2020-10-12 16:22:52,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:22:52,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:52,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:22:52,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:22:52,006 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 6 states. [2020-10-12 16:22:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:52,699 INFO L93 Difference]: Finished difference Result 190 states and 242 transitions. [2020-10-12 16:22:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:22:52,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-12 16:22:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:52,701 INFO L225 Difference]: With dead ends: 190 [2020-10-12 16:22:52,702 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 16:22:52,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:22:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 16:22:52,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 73. [2020-10-12 16:22:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 16:22:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2020-10-12 16:22:52,730 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 27 [2020-10-12 16:22:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:52,730 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2020-10-12 16:22:52,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:22:52,731 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2020-10-12 16:22:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:22:52,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:52,732 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:52,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:22:52,732 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1839549461, now seen corresponding path program 1 times [2020-10-12 16:22:52,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:52,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523979049] [2020-10-12 16:22:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:52,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:53,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:53,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:54,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:54,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:57,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:57,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:22:57,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 16:22:57,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-12 16:22:57,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:22:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:22:57,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:58,448 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2020-10-12 16:22:58,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:58,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:58,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:58,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:58,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:58,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:58,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:58,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:58,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:58,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:58,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 16:22:58,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523979049] [2020-10-12 16:22:58,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:58,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:22:58,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882262563] [2020-10-12 16:22:58,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:22:58,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:58,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:22:58,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:22:58,469 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 9 states. [2020-10-12 16:22:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:58,993 INFO L93 Difference]: Finished difference Result 195 states and 249 transitions. [2020-10-12 16:22:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:22:58,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-12 16:22:58,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:58,998 INFO L225 Difference]: With dead ends: 195 [2020-10-12 16:22:58,998 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 16:22:59,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:22:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 16:22:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 96. [2020-10-12 16:22:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 16:22:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2020-10-12 16:22:59,058 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 33 [2020-10-12 16:22:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:59,060 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2020-10-12 16:22:59,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:22:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2020-10-12 16:22:59,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:22:59,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:59,070 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:59,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:22:59,070 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:59,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:59,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1894299598, now seen corresponding path program 2 times [2020-10-12 16:22:59,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:59,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12816291] [2020-10-12 16:22:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:59,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:59,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:59,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:59,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:59,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:59,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:59,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:59,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:04,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:04,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:23:04,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:23:04,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:23:04,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:04,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:23:04,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:23:04,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:23:04,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:04,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:04,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:04,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:04,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:04,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:04,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:04,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:04,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:04,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:04,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:04,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 16:23:04,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12816291] [2020-10-12 16:23:04,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:04,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:23:04,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259008231] [2020-10-12 16:23:04,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:23:04,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:04,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:23:04,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:23:04,204 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand 9 states. [2020-10-12 16:23:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:06,848 INFO L93 Difference]: Finished difference Result 338 states and 424 transitions. [2020-10-12 16:23:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:23:06,897 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-12 16:23:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:06,898 INFO L225 Difference]: With dead ends: 338 [2020-10-12 16:23:06,898 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 16:23:06,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:23:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 16:23:06,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 118. [2020-10-12 16:23:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 16:23:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2020-10-12 16:23:06,941 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 36 [2020-10-12 16:23:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:06,941 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2020-10-12 16:23:06,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:23:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2020-10-12 16:23:06,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:23:06,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:06,943 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:06,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:23:06,943 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:06,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:06,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1633617163, now seen corresponding path program 3 times [2020-10-12 16:23:06,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:06,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991383740] [2020-10-12 16:23:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:06,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:06,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:07,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:07,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:07,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:07,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:07,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:11,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:23:11,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-12 16:23:11,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:23:11,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:11,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:23:11,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:11,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:23:11,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:12,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:12,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:12,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:12,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:12,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:12,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:23:12,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:12,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-12 16:23:12,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991383740] [2020-10-12 16:23:12,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:12,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:23:12,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847750961] [2020-10-12 16:23:12,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:23:12,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:12,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:23:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:23:12,236 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand 7 states. [2020-10-12 16:23:12,654 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-12 16:23:13,034 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-12 16:23:13,260 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-12 16:23:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:13,642 INFO L93 Difference]: Finished difference Result 280 states and 334 transitions. [2020-10-12 16:23:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:23:13,643 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-10-12 16:23:13,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:13,646 INFO L225 Difference]: With dead ends: 280 [2020-10-12 16:23:13,646 INFO L226 Difference]: Without dead ends: 278 [2020-10-12 16:23:13,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:23:13,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-12 16:23:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 154. [2020-10-12 16:23:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 16:23:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 186 transitions. [2020-10-12 16:23:13,705 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 186 transitions. Word has length 39 [2020-10-12 16:23:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:13,705 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 186 transitions. [2020-10-12 16:23:13,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:23:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 186 transitions. [2020-10-12 16:23:13,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:23:13,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:13,708 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:13,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:23:13,708 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:13,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1523229791, now seen corresponding path program 4 times [2020-10-12 16:23:13,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:13,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684313420] [2020-10-12 16:23:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:13,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:13,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:13,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:13,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:13,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:13,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:13,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:13,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:14,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:15,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:18,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:18,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 16:23:18,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 16:23:18,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 16:23:18,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:23:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:23:18,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:18,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:18,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:18,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:18,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:18,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:18,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:18,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:18,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-12 16:23:18,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684313420] [2020-10-12 16:23:18,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:18,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:23:18,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690770328] [2020-10-12 16:23:18,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:23:18,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:18,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:23:18,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:23:18,935 INFO L87 Difference]: Start difference. First operand 154 states and 186 transitions. Second operand 7 states. [2020-10-12 16:23:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:19,220 INFO L93 Difference]: Finished difference Result 388 states and 474 transitions. [2020-10-12 16:23:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:23:19,221 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-12 16:23:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:19,223 INFO L225 Difference]: With dead ends: 388 [2020-10-12 16:23:19,223 INFO L226 Difference]: Without dead ends: 240 [2020-10-12 16:23:19,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:23:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-12 16:23:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 207. [2020-10-12 16:23:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-12 16:23:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2020-10-12 16:23:19,289 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 51 [2020-10-12 16:23:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:19,289 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2020-10-12 16:23:19,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:23:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2020-10-12 16:23:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 16:23:19,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:19,291 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:19,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:23:19,291 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:19,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1075264139, now seen corresponding path program 5 times [2020-10-12 16:23:19,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:19,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537944488] [2020-10-12 16:23:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:19,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:19,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:19,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:19,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:19,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:19,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:19,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:19,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:19,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:19,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:19,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:24,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:24,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 16:23:24,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 16:23:24,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 16:23:24,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:23:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:23:24,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:24,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:24,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:24,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:24,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:24,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:24,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:23:24,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:24,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:24,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:24,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:24,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 126 proven. 79 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-10-12 16:23:24,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537944488] [2020-10-12 16:23:24,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:24,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:23:24,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752027975] [2020-10-12 16:23:24,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:23:24,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:24,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:23:24,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:23:24,471 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand 8 states. [2020-10-12 16:23:24,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:24,939 INFO L93 Difference]: Finished difference Result 484 states and 587 transitions. [2020-10-12 16:23:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:23:24,940 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-10-12 16:23:24,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:24,942 INFO L225 Difference]: With dead ends: 484 [2020-10-12 16:23:24,942 INFO L226 Difference]: Without dead ends: 283 [2020-10-12 16:23:24,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:23:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-12 16:23:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 251. [2020-10-12 16:23:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-12 16:23:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 301 transitions. [2020-10-12 16:23:24,991 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 301 transitions. Word has length 63 [2020-10-12 16:23:24,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:24,991 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 301 transitions. [2020-10-12 16:23:24,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:23:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 301 transitions. [2020-10-12 16:23:24,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 16:23:24,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:24,992 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:24,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:23:24,993 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:24,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1109437428, now seen corresponding path program 6 times [2020-10-12 16:23:24,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:24,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756496289] [2020-10-12 16:23:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:25,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:26,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:26,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:30,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:30,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 16:23:30,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 16:23:30,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 16:23:30,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:23:30,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:30,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:23:30,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:30,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:30,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:30,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:30,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:30,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:30,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:23:30,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:30,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:30,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:30,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:30,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 181 proven. 35 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-12 16:23:30,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756496289] [2020-10-12 16:23:30,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:30,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:23:30,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074514199] [2020-10-12 16:23:30,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:23:30,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:30,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:23:30,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:23:30,206 INFO L87 Difference]: Start difference. First operand 251 states and 301 transitions. Second operand 9 states. [2020-10-12 16:23:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:30,742 INFO L93 Difference]: Finished difference Result 572 states and 691 transitions. [2020-10-12 16:23:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:23:30,743 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-12 16:23:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:30,746 INFO L225 Difference]: With dead ends: 572 [2020-10-12 16:23:30,746 INFO L226 Difference]: Without dead ends: 327 [2020-10-12 16:23:30,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:23:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-12 16:23:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 295. [2020-10-12 16:23:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-12 16:23:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 353 transitions. [2020-10-12 16:23:30,820 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 353 transitions. Word has length 72 [2020-10-12 16:23:30,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:30,821 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 353 transitions. [2020-10-12 16:23:30,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:23:30,821 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 353 transitions. [2020-10-12 16:23:30,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 16:23:30,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:30,822 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:30,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:23:30,823 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:30,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:30,823 INFO L82 PathProgramCache]: Analyzing trace with hash 318586539, now seen corresponding path program 7 times [2020-10-12 16:23:30,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:30,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882446501] [2020-10-12 16:23:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:30,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:30,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:30,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:30,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:30,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:31,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:31,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:31,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:31,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:31,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:31,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:31,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:35,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:35,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:35,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:35,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 16:23:35,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 16:23:35,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 16:23:35,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:35,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:23:35,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:35,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:23:35,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:36,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:36,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:36,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:36,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:36,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:36,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:36,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:36,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:36,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:36,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:36,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 252 proven. 51 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-10-12 16:23:36,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882446501] [2020-10-12 16:23:36,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:36,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:23:36,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14430056] [2020-10-12 16:23:36,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:23:36,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:36,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:23:36,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:23:36,079 INFO L87 Difference]: Start difference. First operand 295 states and 353 transitions. Second operand 10 states. [2020-10-12 16:23:36,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:36,711 INFO L93 Difference]: Finished difference Result 660 states and 795 transitions. [2020-10-12 16:23:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:23:36,712 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-12 16:23:36,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:36,715 INFO L225 Difference]: With dead ends: 660 [2020-10-12 16:23:36,715 INFO L226 Difference]: Without dead ends: 371 [2020-10-12 16:23:36,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:23:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-10-12 16:23:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 339. [2020-10-12 16:23:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-12 16:23:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 405 transitions. [2020-10-12 16:23:36,815 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 405 transitions. Word has length 81 [2020-10-12 16:23:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:36,815 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 405 transitions. [2020-10-12 16:23:36,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:23:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 405 transitions. [2020-10-12 16:23:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 16:23:36,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:36,828 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:36,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:23:36,829 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:36,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:36,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1958701524, now seen corresponding path program 8 times [2020-10-12 16:23:36,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:36,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212113536] [2020-10-12 16:23:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:36,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:36,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:37,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:37,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:37,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:37,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:37,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:37,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:37,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:37,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:37,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:37,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:37,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:41,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:41,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:41,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 16:23:41,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 16:23:41,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 16:23:41,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:41,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:23:41,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:41,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:23:41,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:42,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:42,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:42,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:42,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:42,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:42,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:42,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:42,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:42,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:42,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:42,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 335 proven. 70 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2020-10-12 16:23:42,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212113536] [2020-10-12 16:23:42,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:42,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:23:42,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92252669] [2020-10-12 16:23:42,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:23:42,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:42,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:23:42,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:23:42,190 INFO L87 Difference]: Start difference. First operand 339 states and 405 transitions. Second operand 11 states. [2020-10-12 16:23:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:42,795 INFO L93 Difference]: Finished difference Result 748 states and 899 transitions. [2020-10-12 16:23:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:23:42,796 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 90 [2020-10-12 16:23:42,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:42,800 INFO L225 Difference]: With dead ends: 748 [2020-10-12 16:23:42,800 INFO L226 Difference]: Without dead ends: 415 [2020-10-12 16:23:42,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:23:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-12 16:23:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 383. [2020-10-12 16:23:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-12 16:23:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 457 transitions. [2020-10-12 16:23:42,893 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 457 transitions. Word has length 90 [2020-10-12 16:23:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:42,894 INFO L479 AbstractCegarLoop]: Abstraction has 383 states and 457 transitions. [2020-10-12 16:23:42,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:23:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 457 transitions. [2020-10-12 16:23:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 16:23:42,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:42,896 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:42,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:23:42,896 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:42,896 INFO L82 PathProgramCache]: Analyzing trace with hash -13731125, now seen corresponding path program 9 times [2020-10-12 16:23:42,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:42,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121585061] [2020-10-12 16:23:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:42,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:42,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:43,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:43,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:43,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:43,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:43,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:43,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:43,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:43,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:43,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:43,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:44,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:44,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:47,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:47,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 16:23:47,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 16:23:47,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 16:23:47,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:47,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:23:47,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:47,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:23:47,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:48,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:48,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:48,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:48,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:48,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:48,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:23:48,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:48,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:48,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:48,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:48,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 430 proven. 92 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-12 16:23:48,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121585061] [2020-10-12 16:23:48,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:48,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:23:48,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578666203] [2020-10-12 16:23:48,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:23:48,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:48,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:23:48,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:23:48,349 INFO L87 Difference]: Start difference. First operand 383 states and 457 transitions. Second operand 12 states. [2020-10-12 16:23:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:49,063 INFO L93 Difference]: Finished difference Result 836 states and 1003 transitions. [2020-10-12 16:23:49,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:23:49,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 99 [2020-10-12 16:23:49,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:49,071 INFO L225 Difference]: With dead ends: 836 [2020-10-12 16:23:49,072 INFO L226 Difference]: Without dead ends: 459 [2020-10-12 16:23:49,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:23:49,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-12 16:23:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 427. [2020-10-12 16:23:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-12 16:23:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 509 transitions. [2020-10-12 16:23:49,153 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 509 transitions. Word has length 99 [2020-10-12 16:23:49,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:49,154 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 509 transitions. [2020-10-12 16:23:49,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:23:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 509 transitions. [2020-10-12 16:23:49,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 16:23:49,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:49,156 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:49,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:23:49,156 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:49,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1255346252, now seen corresponding path program 10 times [2020-10-12 16:23:49,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:49,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721054828] [2020-10-12 16:23:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:50,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:52,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:52,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:54,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:54,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 16:23:54,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 16:23:54,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 16:23:54,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:54,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:23:54,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:54,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:23:54,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:54,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:54,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:54,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:54,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:54,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:54,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:54,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:54,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:54,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:54,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:23:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 537 proven. 117 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2020-10-12 16:23:54,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721054828] [2020-10-12 16:23:54,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:54,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:23:54,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675431899] [2020-10-12 16:23:54,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:23:54,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:54,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:23:54,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:23:54,923 INFO L87 Difference]: Start difference. First operand 427 states and 509 transitions. Second operand 13 states. [2020-10-12 16:23:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:55,957 INFO L93 Difference]: Finished difference Result 924 states and 1107 transitions. [2020-10-12 16:23:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:23:55,957 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-10-12 16:23:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:55,961 INFO L225 Difference]: With dead ends: 924 [2020-10-12 16:23:55,961 INFO L226 Difference]: Without dead ends: 503 [2020-10-12 16:23:55,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:23:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2020-10-12 16:23:56,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 471. [2020-10-12 16:23:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-10-12 16:23:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 561 transitions. [2020-10-12 16:23:56,067 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 561 transitions. Word has length 108 [2020-10-12 16:23:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:56,067 INFO L479 AbstractCegarLoop]: Abstraction has 471 states and 561 transitions. [2020-10-12 16:23:56,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:23:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 561 transitions. [2020-10-12 16:23:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-12 16:23:56,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:56,069 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:56,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:23:56,069 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:56,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1759309547, now seen corresponding path program 11 times [2020-10-12 16:23:56,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:56,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663542793] [2020-10-12 16:23:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:56,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:56,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:56,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:56,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:56,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:56,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:56,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:56,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:56,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:56,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:56,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:56,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:56,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:57,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:57,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:01,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:01,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-12 16:24:01,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 16:24:01,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 16:24:01,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:01,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:24:01,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:24:01,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:24:01,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:01,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:01,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:01,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:24:01,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:01,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:24:01,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:01,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:01,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:01,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:01,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 656 proven. 145 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-10-12 16:24:01,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663542793] [2020-10-12 16:24:01,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:01,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:24:01,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152528314] [2020-10-12 16:24:01,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:24:01,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:01,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:24:01,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:24:01,711 INFO L87 Difference]: Start difference. First operand 471 states and 561 transitions. Second operand 14 states. [2020-10-12 16:24:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:02,790 INFO L93 Difference]: Finished difference Result 1012 states and 1211 transitions. [2020-10-12 16:24:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:24:02,791 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 117 [2020-10-12 16:24:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:02,793 INFO L225 Difference]: With dead ends: 1012 [2020-10-12 16:24:02,794 INFO L226 Difference]: Without dead ends: 547 [2020-10-12 16:24:02,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:24:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-12 16:24:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 515. [2020-10-12 16:24:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-10-12 16:24:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 613 transitions. [2020-10-12 16:24:02,928 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 613 transitions. Word has length 117 [2020-10-12 16:24:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:02,929 INFO L479 AbstractCegarLoop]: Abstraction has 515 states and 613 transitions. [2020-10-12 16:24:02,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:24:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 613 transitions. [2020-10-12 16:24:02,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 16:24:02,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:02,931 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:02,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:24:02,931 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:02,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1929953900, now seen corresponding path program 12 times [2020-10-12 16:24:02,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:02,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818654932] [2020-10-12 16:24:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:03,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:04,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:04,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:08,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:08,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-12 16:24:08,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 16:24:08,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-12 16:24:08,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:08,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:24:08,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:24:08,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:24:08,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:08,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:08,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:08,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:08,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:24:08,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:08,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:24:08,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:08,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 787 proven. 176 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2020-10-12 16:24:08,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818654932] [2020-10-12 16:24:08,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:08,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:24:08,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293413665] [2020-10-12 16:24:08,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:24:08,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:08,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:24:08,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:24:08,471 INFO L87 Difference]: Start difference. First operand 515 states and 613 transitions. Second operand 15 states. [2020-10-12 16:24:09,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:09,952 INFO L93 Difference]: Finished difference Result 1100 states and 1315 transitions. [2020-10-12 16:24:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:24:09,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 126 [2020-10-12 16:24:09,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:09,957 INFO L225 Difference]: With dead ends: 1100 [2020-10-12 16:24:09,957 INFO L226 Difference]: Without dead ends: 591 [2020-10-12 16:24:09,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:24:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-10-12 16:24:10,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 559. [2020-10-12 16:24:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-10-12 16:24:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 665 transitions. [2020-10-12 16:24:10,080 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 665 transitions. Word has length 126 [2020-10-12 16:24:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:10,080 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 665 transitions. [2020-10-12 16:24:10,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:24:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 665 transitions. [2020-10-12 16:24:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-12 16:24:10,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:10,083 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:10,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:24:10,083 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash 129669899, now seen corresponding path program 13 times [2020-10-12 16:24:10,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:10,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926383936] [2020-10-12 16:24:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:10,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:10,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:11,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:15,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:15,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-12 16:24:15,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 16:24:15,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 16:24:15,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:15,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:24:15,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:24:15,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:24:15,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:15,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:15,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:15,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:15,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:24:15,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:15,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:24:15,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:15,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:15,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:15,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:15,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2052 backedges. 930 proven. 210 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2020-10-12 16:24:15,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926383936] [2020-10-12 16:24:15,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:15,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:24:15,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144922730] [2020-10-12 16:24:15,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:24:15,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:24:15,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:24:15,592 INFO L87 Difference]: Start difference. First operand 559 states and 665 transitions. Second operand 16 states. [2020-10-12 16:24:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:17,393 INFO L93 Difference]: Finished difference Result 1188 states and 1419 transitions. [2020-10-12 16:24:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:24:17,394 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 135 [2020-10-12 16:24:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:17,397 INFO L225 Difference]: With dead ends: 1188 [2020-10-12 16:24:17,397 INFO L226 Difference]: Without dead ends: 635 [2020-10-12 16:24:17,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:24:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2020-10-12 16:24:17,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 603. [2020-10-12 16:24:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-10-12 16:24:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 717 transitions. [2020-10-12 16:24:17,514 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 717 transitions. Word has length 135 [2020-10-12 16:24:17,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:17,514 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 717 transitions. [2020-10-12 16:24:17,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:24:17,514 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 717 transitions. [2020-10-12 16:24:17,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-12 16:24:17,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:17,516 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:17,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:24:17,517 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:17,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:17,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1647072116, now seen corresponding path program 14 times [2020-10-12 16:24:17,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:17,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933801426] [2020-10-12 16:24:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:17,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:18,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:18,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:18,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:18,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:18,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:18,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:18,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:22,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:22,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-12 16:24:22,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 16:24:22,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 16:24:22,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:24:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:24:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 16:24:22,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:23,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:23,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:23,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:23,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:24:23,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:23,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:24:23,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:23,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:23,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2397 backedges. 1085 proven. 247 refuted. 0 times theorem prover too weak. 1065 trivial. 0 not checked. [2020-10-12 16:24:23,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933801426] [2020-10-12 16:24:23,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:23,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:24:23,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965172196] [2020-10-12 16:24:23,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:24:23,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:23,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:24:23,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:24:23,261 INFO L87 Difference]: Start difference. First operand 603 states and 717 transitions. Second operand 17 states. [2020-10-12 16:24:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:24,618 INFO L93 Difference]: Finished difference Result 1276 states and 1523 transitions. [2020-10-12 16:24:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:24:24,619 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 144 [2020-10-12 16:24:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:24,622 INFO L225 Difference]: With dead ends: 1276 [2020-10-12 16:24:24,623 INFO L226 Difference]: Without dead ends: 679 [2020-10-12 16:24:24,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:24:24,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-10-12 16:24:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 647. [2020-10-12 16:24:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2020-10-12 16:24:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 769 transitions. [2020-10-12 16:24:24,741 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 769 transitions. Word has length 144 [2020-10-12 16:24:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:24,741 INFO L479 AbstractCegarLoop]: Abstraction has 647 states and 769 transitions. [2020-10-12 16:24:24,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:24:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 769 transitions. [2020-10-12 16:24:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-12 16:24:24,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:24,744 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:24,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:24:24,745 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:24,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:24,745 INFO L82 PathProgramCache]: Analyzing trace with hash 117014315, now seen corresponding path program 15 times [2020-10-12 16:24:24,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:24,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978891160] [2020-10-12 16:24:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:24,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:24,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:29,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:29,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-12 16:24:29,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 16:24:29,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-12 16:24:29,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:29,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:24:29,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:24:29,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 16:24:29,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:30,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:30,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:30,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:30,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:24:30,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:30,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:24:30,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:30,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:30,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:30,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:30,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2769 backedges. 1252 proven. 287 refuted. 0 times theorem prover too weak. 1230 trivial. 0 not checked. [2020-10-12 16:24:30,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978891160] [2020-10-12 16:24:30,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:30,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:24:30,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690357753] [2020-10-12 16:24:30,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:24:30,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:24:30,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:24:30,613 INFO L87 Difference]: Start difference. First operand 647 states and 769 transitions. Second operand 18 states. [2020-10-12 16:24:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:32,807 INFO L93 Difference]: Finished difference Result 1364 states and 1627 transitions. [2020-10-12 16:24:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:24:32,807 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 153 [2020-10-12 16:24:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:32,810 INFO L225 Difference]: With dead ends: 1364 [2020-10-12 16:24:32,811 INFO L226 Difference]: Without dead ends: 723 [2020-10-12 16:24:32,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:24:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2020-10-12 16:24:33,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 691. [2020-10-12 16:24:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-10-12 16:24:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 821 transitions. [2020-10-12 16:24:33,010 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 821 transitions. Word has length 153 [2020-10-12 16:24:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:33,010 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 821 transitions. [2020-10-12 16:24:33,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:24:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 821 transitions. [2020-10-12 16:24:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-12 16:24:33,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:33,013 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:33,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:24:33,013 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:33,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:33,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1465528660, now seen corresponding path program 16 times [2020-10-12 16:24:33,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:33,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193436688] [2020-10-12 16:24:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:33,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:33,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:34,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:34,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:34,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:38,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:38,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-12 16:24:38,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 16:24:38,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-12 16:24:38,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:38,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:24:38,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:24:38,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 16:24:38,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:38,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:38,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:38,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:38,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:24:38,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:38,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:24:38,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:38,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:38,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:38,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:38,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3168 backedges. 1431 proven. 330 refuted. 0 times theorem prover too weak. 1407 trivial. 0 not checked. [2020-10-12 16:24:38,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193436688] [2020-10-12 16:24:38,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:38,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:24:38,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124141340] [2020-10-12 16:24:38,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:24:38,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:38,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:24:38,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:24:38,876 INFO L87 Difference]: Start difference. First operand 691 states and 821 transitions. Second operand 19 states. [2020-10-12 16:24:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:41,386 INFO L93 Difference]: Finished difference Result 1452 states and 1731 transitions. [2020-10-12 16:24:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:24:41,389 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 162 [2020-10-12 16:24:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:41,392 INFO L225 Difference]: With dead ends: 1452 [2020-10-12 16:24:41,393 INFO L226 Difference]: Without dead ends: 767 [2020-10-12 16:24:41,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:24:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-10-12 16:24:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 735. [2020-10-12 16:24:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2020-10-12 16:24:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 873 transitions. [2020-10-12 16:24:41,583 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 873 transitions. Word has length 162 [2020-10-12 16:24:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:41,583 INFO L479 AbstractCegarLoop]: Abstraction has 735 states and 873 transitions. [2020-10-12 16:24:41,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:24:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 873 transitions. [2020-10-12 16:24:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-12 16:24:41,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:41,586 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:41,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:24:41,586 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:41,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:41,587 INFO L82 PathProgramCache]: Analyzing trace with hash 625711947, now seen corresponding path program 17 times [2020-10-12 16:24:41,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:41,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594392935] [2020-10-12 16:24:41,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:41,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:41,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:41,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:43,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:46,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:46,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-12 16:24:46,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 16:24:46,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-12 16:24:46,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:24:46,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:24:46,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 16:24:46,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:47,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:47,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:47,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:47,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:24:47,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:47,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:24:47,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:47,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:47,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:47,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:47,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3594 backedges. 1622 proven. 376 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2020-10-12 16:24:47,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594392935] [2020-10-12 16:24:47,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:47,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:24:47,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169669857] [2020-10-12 16:24:47,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:24:47,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:47,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:24:47,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:24:47,558 INFO L87 Difference]: Start difference. First operand 735 states and 873 transitions. Second operand 20 states. [2020-10-12 16:24:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:49,669 INFO L93 Difference]: Finished difference Result 1540 states and 1835 transitions. [2020-10-12 16:24:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:24:49,670 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 171 [2020-10-12 16:24:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:49,673 INFO L225 Difference]: With dead ends: 1540 [2020-10-12 16:24:49,673 INFO L226 Difference]: Without dead ends: 811 [2020-10-12 16:24:49,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:24:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-10-12 16:24:49,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 779. [2020-10-12 16:24:49,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2020-10-12 16:24:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 925 transitions. [2020-10-12 16:24:49,879 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 925 transitions. Word has length 171 [2020-10-12 16:24:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:49,879 INFO L479 AbstractCegarLoop]: Abstraction has 779 states and 925 transitions. [2020-10-12 16:24:49,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:24:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 925 transitions. [2020-10-12 16:24:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-12 16:24:49,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:49,882 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 51, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:49,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:24:49,882 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:49,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:49,883 INFO L82 PathProgramCache]: Analyzing trace with hash 730781492, now seen corresponding path program 18 times [2020-10-12 16:24:49,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:49,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767538751] [2020-10-12 16:24:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:50,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:51,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:51,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:53,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:53,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:54,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:54,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-12 16:24:54,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-12 16:24:54,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 16:24:54,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:54,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:24:54,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:24:54,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 16:24:54,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:55,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:55,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:55,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:55,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:24:55,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:55,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:24:55,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:55,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:55,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:55,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:55,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4047 backedges. 1825 proven. 425 refuted. 0 times theorem prover too weak. 1797 trivial. 0 not checked. [2020-10-12 16:24:55,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767538751] [2020-10-12 16:24:55,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:55,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:24:55,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952732325] [2020-10-12 16:24:55,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:24:55,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:55,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:24:55,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:24:55,756 INFO L87 Difference]: Start difference. First operand 779 states and 925 transitions. Second operand 21 states. [2020-10-12 16:24:58,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:58,958 INFO L93 Difference]: Finished difference Result 1628 states and 1939 transitions. [2020-10-12 16:24:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:24:58,958 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 180 [2020-10-12 16:24:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:58,961 INFO L225 Difference]: With dead ends: 1628 [2020-10-12 16:24:58,961 INFO L226 Difference]: Without dead ends: 855 [2020-10-12 16:24:58,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:24:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-10-12 16:24:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 823. [2020-10-12 16:24:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 823 states. [2020-10-12 16:24:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 977 transitions. [2020-10-12 16:24:59,149 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 977 transitions. Word has length 180 [2020-10-12 16:24:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:59,150 INFO L479 AbstractCegarLoop]: Abstraction has 823 states and 977 transitions. [2020-10-12 16:24:59,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:24:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 977 transitions. [2020-10-12 16:24:59,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-12 16:24:59,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:59,154 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 54, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:59,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:24:59,154 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:59,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:59,154 INFO L82 PathProgramCache]: Analyzing trace with hash -723325077, now seen corresponding path program 19 times [2020-10-12 16:24:59,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:59,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020291649] [2020-10-12 16:24:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:59,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:00,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:00,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:00,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:00,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:00,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:00,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:00,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:00,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:03,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:03,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:04,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:04,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-12 16:25:04,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-12 16:25:04,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-12 16:25:04,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:04,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:25:04,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:25:04,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 16:25:04,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:05,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:05,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:05,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:05,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:05,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:05,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:25:05,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:05,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:05,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:05,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 2040 proven. 477 refuted. 0 times theorem prover too weak. 2010 trivial. 0 not checked. [2020-10-12 16:25:05,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020291649] [2020-10-12 16:25:05,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:05,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:25:05,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112617742] [2020-10-12 16:25:05,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:25:05,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:05,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:25:05,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:25:05,374 INFO L87 Difference]: Start difference. First operand 823 states and 977 transitions. Second operand 22 states. [2020-10-12 16:25:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:07,898 INFO L93 Difference]: Finished difference Result 1716 states and 2043 transitions. [2020-10-12 16:25:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:25:07,899 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 189 [2020-10-12 16:25:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:07,902 INFO L225 Difference]: With dead ends: 1716 [2020-10-12 16:25:07,902 INFO L226 Difference]: Without dead ends: 899 [2020-10-12 16:25:07,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:25:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2020-10-12 16:25:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 867. [2020-10-12 16:25:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2020-10-12 16:25:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1029 transitions. [2020-10-12 16:25:08,070 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1029 transitions. Word has length 189 [2020-10-12 16:25:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:08,070 INFO L479 AbstractCegarLoop]: Abstraction has 867 states and 1029 transitions. [2020-10-12 16:25:08,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:25:08,070 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1029 transitions. [2020-10-12 16:25:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-12 16:25:08,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:08,073 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 57, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:08,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:25:08,073 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:08,074 INFO L82 PathProgramCache]: Analyzing trace with hash 441992468, now seen corresponding path program 20 times [2020-10-12 16:25:08,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:08,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235937896] [2020-10-12 16:25:08,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:08,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:08,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:08,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:08,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:08,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:08,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:08,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:08,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:08,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:08,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:08,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:08,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:08,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:09,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:09,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:09,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:09,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:09,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:10,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:10,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:13,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:13,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-12 16:25:13,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-12 16:25:13,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-12 16:25:13,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:13,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:25:13,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 16:25:13,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:25:13,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:13,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:13,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:13,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:13,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:13,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:13,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:25:13,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:13,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:13,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:13,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:13,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5034 backedges. 1649 proven. 0 refuted. 0 times theorem prover too weak. 3385 trivial. 0 not checked. [2020-10-12 16:25:13,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235937896] [2020-10-12 16:25:13,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:25:13,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 16:25:13,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320267207] [2020-10-12 16:25:13,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 16:25:13,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:13,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 16:25:13,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:25:13,247 INFO L87 Difference]: Start difference. First operand 867 states and 1029 transitions. Second operand 3 states. [2020-10-12 16:25:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:13,558 INFO L93 Difference]: Finished difference Result 2424 states and 2902 transitions. [2020-10-12 16:25:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 16:25:13,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2020-10-12 16:25:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:13,565 INFO L225 Difference]: With dead ends: 2424 [2020-10-12 16:25:13,565 INFO L226 Difference]: Without dead ends: 1563 [2020-10-12 16:25:13,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:25:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2020-10-12 16:25:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 944. [2020-10-12 16:25:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-10-12 16:25:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1106 transitions. [2020-10-12 16:25:13,789 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1106 transitions. Word has length 198 [2020-10-12 16:25:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:13,789 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1106 transitions. [2020-10-12 16:25:13,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 16:25:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1106 transitions. [2020-10-12 16:25:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2020-10-12 16:25:13,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:13,796 INFO L422 BasicCegarLoop]: trace histogram [117, 116, 116, 58, 58, 57, 57, 57, 57, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:13,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:25:13,797 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:13,797 INFO L82 PathProgramCache]: Analyzing trace with hash -200477675, now seen corresponding path program 1 times [2020-10-12 16:25:13,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:13,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039604328] [2020-10-12 16:25:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:15,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:16,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:17,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:17,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:18,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:18,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:19,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:19,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:19,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:19,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 717 [2020-10-12 16:25:19,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:25:19,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5194 [2020-10-12 16:25:19,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:25:19,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:25:19,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:25:19,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:19,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:19,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:19,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:19,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:19,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:19,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:25:19,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:19,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:19,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:19,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:19,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 40032 backedges. 3784 proven. 11 refuted. 0 times theorem prover too weak. 36237 trivial. 0 not checked. [2020-10-12 16:25:20,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039604328] [2020-10-12 16:25:20,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:20,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:25:20,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373120485] [2020-10-12 16:25:20,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:25:20,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:20,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:25:20,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:25:20,033 INFO L87 Difference]: Start difference. First operand 944 states and 1106 transitions. Second operand 6 states. [2020-10-12 16:25:20,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:20,351 INFO L93 Difference]: Finished difference Result 2266 states and 2668 transitions. [2020-10-12 16:25:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:25:20,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 711 [2020-10-12 16:25:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:20,357 INFO L225 Difference]: With dead ends: 2266 [2020-10-12 16:25:20,357 INFO L226 Difference]: Without dead ends: 1328 [2020-10-12 16:25:20,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:25:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2020-10-12 16:25:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1175. [2020-10-12 16:25:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2020-10-12 16:25:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1337 transitions. [2020-10-12 16:25:20,623 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1337 transitions. Word has length 711 [2020-10-12 16:25:20,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:20,623 INFO L479 AbstractCegarLoop]: Abstraction has 1175 states and 1337 transitions. [2020-10-12 16:25:20,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:25:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1337 transitions. [2020-10-12 16:25:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 886 [2020-10-12 16:25:20,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:20,632 INFO L422 BasicCegarLoop]: trace histogram [175, 174, 174, 58, 58, 57, 57, 57, 57, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:20,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:25:20,632 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:20,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1018739875, now seen corresponding path program 2 times [2020-10-12 16:25:20,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:20,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906680435] [2020-10-12 16:25:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:22,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:23,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:24,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:25,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:26,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:27,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:27,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 891 [2020-10-12 16:25:27,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:25:27,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5731 [2020-10-12 16:25:27,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:25:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:25:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:25:27,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:27,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:27,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:27,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:27,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:27,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:27,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:25:27,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:27,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:27,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:27,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:27,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 68597 backedges. 4412 proven. 16 refuted. 0 times theorem prover too weak. 64169 trivial. 0 not checked. [2020-10-12 16:25:27,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906680435] [2020-10-12 16:25:27,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:27,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:25:27,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197289271] [2020-10-12 16:25:27,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:25:27,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:27,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:25:27,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:25:27,801 INFO L87 Difference]: Start difference. First operand 1175 states and 1337 transitions. Second operand 7 states. [2020-10-12 16:25:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:28,196 INFO L93 Difference]: Finished difference Result 2728 states and 3130 transitions. [2020-10-12 16:25:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:25:28,196 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 885 [2020-10-12 16:25:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:28,202 INFO L225 Difference]: With dead ends: 2728 [2020-10-12 16:25:28,202 INFO L226 Difference]: Without dead ends: 1559 [2020-10-12 16:25:28,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:25:28,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2020-10-12 16:25:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1406. [2020-10-12 16:25:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1406 states. [2020-10-12 16:25:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 1568 transitions. [2020-10-12 16:25:28,448 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 1568 transitions. Word has length 885 [2020-10-12 16:25:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:28,448 INFO L479 AbstractCegarLoop]: Abstraction has 1406 states and 1568 transitions. [2020-10-12 16:25:28,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:25:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 1568 transitions. [2020-10-12 16:25:28,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2020-10-12 16:25:28,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:28,460 INFO L422 BasicCegarLoop]: trace histogram [233, 232, 232, 58, 58, 57, 57, 57, 57, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:28,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:25:28,460 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash -12857515, now seen corresponding path program 3 times [2020-10-12 16:25:28,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:28,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971108015] [2020-10-12 16:25:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:30,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:34,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:35,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:35,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1065 [2020-10-12 16:25:35,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:25:35,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5504 [2020-10-12 16:25:35,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:35,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:25:35,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:25:35,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:25:35,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:35,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:35,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:35,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:35,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:35,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:35,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:25:35,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:35,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:35,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:35,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:35,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 107254 backedges. 3430 proven. 22 refuted. 0 times theorem prover too weak. 103802 trivial. 0 not checked. [2020-10-12 16:25:35,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971108015] [2020-10-12 16:25:35,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:35,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:25:35,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101421581] [2020-10-12 16:25:35,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:25:35,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:35,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:25:35,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:25:35,833 INFO L87 Difference]: Start difference. First operand 1406 states and 1568 transitions. Second operand 8 states. [2020-10-12 16:25:36,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:36,374 INFO L93 Difference]: Finished difference Result 3190 states and 3592 transitions. [2020-10-12 16:25:36,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:25:36,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1059 [2020-10-12 16:25:36,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:36,382 INFO L225 Difference]: With dead ends: 3190 [2020-10-12 16:25:36,382 INFO L226 Difference]: Without dead ends: 1790 [2020-10-12 16:25:36,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:25:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2020-10-12 16:25:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1637. [2020-10-12 16:25:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1637 states. [2020-10-12 16:25:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 1799 transitions. [2020-10-12 16:25:36,656 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 1799 transitions. Word has length 1059 [2020-10-12 16:25:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:36,656 INFO L479 AbstractCegarLoop]: Abstraction has 1637 states and 1799 transitions. [2020-10-12 16:25:36,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:25:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 1799 transitions. [2020-10-12 16:25:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1234 [2020-10-12 16:25:36,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:36,669 INFO L422 BasicCegarLoop]: trace histogram [291, 290, 290, 58, 58, 57, 57, 57, 57, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:36,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:25:36,669 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1317404771, now seen corresponding path program 4 times [2020-10-12 16:25:36,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:36,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18554885] [2020-10-12 16:25:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:39,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:42,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:43,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:43,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1239 [2020-10-12 16:25:43,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:25:43,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5186 [2020-10-12 16:25:43,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:43,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:25:43,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:25:43,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:25:43,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:43,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:43,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:43,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:43,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:43,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:43,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:25:43,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:43,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:43,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:43,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:43,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 156003 backedges. 5084 proven. 35 refuted. 0 times theorem prover too weak. 150884 trivial. 0 not checked. [2020-10-12 16:25:44,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18554885] [2020-10-12 16:25:44,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:44,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:25:44,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674092646] [2020-10-12 16:25:44,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:25:44,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:44,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:25:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:25:44,066 INFO L87 Difference]: Start difference. First operand 1637 states and 1799 transitions. Second operand 9 states. [2020-10-12 16:25:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:44,730 INFO L93 Difference]: Finished difference Result 3652 states and 4054 transitions. [2020-10-12 16:25:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:25:44,731 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1233 [2020-10-12 16:25:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:44,736 INFO L225 Difference]: With dead ends: 3652 [2020-10-12 16:25:44,736 INFO L226 Difference]: Without dead ends: 2021 [2020-10-12 16:25:44,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:25:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2020-10-12 16:25:45,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1868. [2020-10-12 16:25:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1868 states. [2020-10-12 16:25:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2030 transitions. [2020-10-12 16:25:45,031 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2030 transitions. Word has length 1233 [2020-10-12 16:25:45,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:45,032 INFO L479 AbstractCegarLoop]: Abstraction has 1868 states and 2030 transitions. [2020-10-12 16:25:45,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:25:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2030 transitions. [2020-10-12 16:25:45,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1408 [2020-10-12 16:25:45,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:45,103 INFO L422 BasicCegarLoop]: trace histogram [349, 348, 348, 58, 58, 57, 57, 57, 57, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:45,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:25:45,103 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:45,104 INFO L82 PathProgramCache]: Analyzing trace with hash 678230677, now seen corresponding path program 5 times [2020-10-12 16:25:45,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:45,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487695881] [2020-10-12 16:25:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:48,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:51,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:53,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:53,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1413 [2020-10-12 16:25:53,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:25:53,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6447 [2020-10-12 16:25:53,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:53,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:25:53,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:25:53,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:25:53,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:53,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:53,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:53,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:53,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:53,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:25:53,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:53,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:53,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:53,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:53,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 214844 backedges. 7080 proven. 51 refuted. 0 times theorem prover too weak. 207713 trivial. 0 not checked. [2020-10-12 16:25:54,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487695881] [2020-10-12 16:25:54,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:54,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:25:54,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006244272] [2020-10-12 16:25:54,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:25:54,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:54,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:25:54,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:25:54,229 INFO L87 Difference]: Start difference. First operand 1868 states and 2030 transitions. Second operand 10 states. [2020-10-12 16:25:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:54,945 INFO L93 Difference]: Finished difference Result 4114 states and 4516 transitions. [2020-10-12 16:25:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:25:54,946 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1407 [2020-10-12 16:25:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:54,954 INFO L225 Difference]: With dead ends: 4114 [2020-10-12 16:25:54,954 INFO L226 Difference]: Without dead ends: 2252 [2020-10-12 16:25:54,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:25:54,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2020-10-12 16:25:55,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 2099. [2020-10-12 16:25:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2099 states. [2020-10-12 16:25:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 2261 transitions. [2020-10-12 16:25:55,277 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 2261 transitions. Word has length 1407 [2020-10-12 16:25:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:55,277 INFO L479 AbstractCegarLoop]: Abstraction has 2099 states and 2261 transitions. [2020-10-12 16:25:55,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:25:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 2261 transitions. [2020-10-12 16:25:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1582 [2020-10-12 16:25:55,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:55,293 INFO L422 BasicCegarLoop]: trace histogram [407, 406, 406, 58, 58, 57, 57, 57, 57, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:55,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:25:55,293 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2084080605, now seen corresponding path program 6 times [2020-10-12 16:25:55,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:55,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081839328] [2020-10-12 16:25:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:58,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:02,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:04,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:04,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1587 [2020-10-12 16:26:04,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:26:04,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7477 [2020-10-12 16:26:04,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:26:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:26:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:26:04,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:04,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:04,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:04,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:04,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:26:04,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:04,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:26:04,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:04,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:04,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:04,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:04,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 283777 backedges. 9418 proven. 70 refuted. 0 times theorem prover too weak. 274289 trivial. 0 not checked. [2020-10-12 16:26:05,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081839328] [2020-10-12 16:26:05,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:05,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:26:05,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477831197] [2020-10-12 16:26:05,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:26:05,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:05,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:26:05,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:26:05,553 INFO L87 Difference]: Start difference. First operand 2099 states and 2261 transitions. Second operand 11 states. [2020-10-12 16:26:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:06,200 INFO L93 Difference]: Finished difference Result 4576 states and 4978 transitions. [2020-10-12 16:26:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:26:06,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1581 [2020-10-12 16:26:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:06,210 INFO L225 Difference]: With dead ends: 4576 [2020-10-12 16:26:06,210 INFO L226 Difference]: Without dead ends: 2483 [2020-10-12 16:26:06,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:26:06,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2020-10-12 16:26:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2330. [2020-10-12 16:26:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2330 states. [2020-10-12 16:26:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 2492 transitions. [2020-10-12 16:26:06,564 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 2492 transitions. Word has length 1581 [2020-10-12 16:26:06,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:06,564 INFO L479 AbstractCegarLoop]: Abstraction has 2330 states and 2492 transitions. [2020-10-12 16:26:06,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:26:06,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 2492 transitions. [2020-10-12 16:26:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1756 [2020-10-12 16:26:06,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:06,591 INFO L422 BasicCegarLoop]: trace histogram [465, 464, 464, 58, 58, 57, 57, 57, 57, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:06,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:26:06,591 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:06,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:06,592 INFO L82 PathProgramCache]: Analyzing trace with hash -933464619, now seen corresponding path program 7 times [2020-10-12 16:26:06,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:06,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118442850] [2020-10-12 16:26:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:09,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:14,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:17,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:17,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1761 [2020-10-12 16:26:17,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:26:17,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8929 [2020-10-12 16:26:17,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:26:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:26:17,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:26:17,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:17,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:17,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:17,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:17,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:26:17,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:17,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:26:17,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:17,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:17,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:17,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:17,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 362802 backedges. 12098 proven. 92 refuted. 0 times theorem prover too weak. 350612 trivial. 0 not checked. [2020-10-12 16:26:18,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118442850] [2020-10-12 16:26:18,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:18,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:26:18,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900828317] [2020-10-12 16:26:18,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:26:18,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:18,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:26:18,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:26:18,790 INFO L87 Difference]: Start difference. First operand 2330 states and 2492 transitions. Second operand 12 states. [2020-10-12 16:26:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:19,568 INFO L93 Difference]: Finished difference Result 5038 states and 5440 transitions. [2020-10-12 16:26:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:26:19,569 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1755 [2020-10-12 16:26:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:19,577 INFO L225 Difference]: With dead ends: 5038 [2020-10-12 16:26:19,577 INFO L226 Difference]: Without dead ends: 2714 [2020-10-12 16:26:19,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:26:19,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2020-10-12 16:26:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2561. [2020-10-12 16:26:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2561 states. [2020-10-12 16:26:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 2723 transitions. [2020-10-12 16:26:19,963 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 2723 transitions. Word has length 1755 [2020-10-12 16:26:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:19,964 INFO L479 AbstractCegarLoop]: Abstraction has 2561 states and 2723 transitions. [2020-10-12 16:26:19,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:26:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 2723 transitions. [2020-10-12 16:26:19,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1930 [2020-10-12 16:26:19,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:19,987 INFO L422 BasicCegarLoop]: trace histogram [523, 522, 522, 58, 58, 57, 57, 57, 57, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:19,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:26:19,987 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1702959075, now seen corresponding path program 8 times [2020-10-12 16:26:19,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:19,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971965291] [2020-10-12 16:26:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:23,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking...