/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product51.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:47:45,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:47:45,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:47:45,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:47:45,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:47:45,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:47:45,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:47:45,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:47:45,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:47:45,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:47:45,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:47:45,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:47:45,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:47:45,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:47:45,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:47:45,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:47:45,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:47:45,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:47:45,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:47:45,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:47:45,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:47:45,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:47:45,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:47:45,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:47:45,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:47:45,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:47:45,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:47:45,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:47:45,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:47:45,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:47:45,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:47:45,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:47:45,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:47:45,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:47:45,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:47:45,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:47:45,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:47:45,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:47:45,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:47:45,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:47:45,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:47:45,447 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 [2020-08-18 21:47:45,469 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:47:45,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:47:45,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:47:45,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:47:45,472 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:47:45,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:47:45,472 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:47:45,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:47:45,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:47:45,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:47:45,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:47:45,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:47:45,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:47:45,473 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:47:45,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:47:45,474 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:47:45,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:47:45,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:47:45,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:47:45,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:47:45,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:47:45,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:47:45,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:47:45,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:47:45,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:47:45,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:47:45,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:47:45,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:47:45,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:47:45,477 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:47:45,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:47:45,778 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:47:45,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:47:45,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:47:45,783 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:47:45,784 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product51.cil.c [2020-08-18 21:47:45,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f0ba5791/9cd8bc16568f40b4bc36c8010ca28359/FLAG831fe368d [2020-08-18 21:47:46,397 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:47:46,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product51.cil.c [2020-08-18 21:47:46,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f0ba5791/9cd8bc16568f40b4bc36c8010ca28359/FLAG831fe368d [2020-08-18 21:47:46,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f0ba5791/9cd8bc16568f40b4bc36c8010ca28359 [2020-08-18 21:47:46,715 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:47:46,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:47:46,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:47:46,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:47:46,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:47:46,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:47:46" (1/1) ... [2020-08-18 21:47:46,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@106b6e83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:47:46, skipping insertion in model container [2020-08-18 21:47:46,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:47:46" (1/1) ... [2020-08-18 21:47:46,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:47:46,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:47:47,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:47:47,258 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:47:47,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:47:47,418 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:47:47,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:47:47 WrapperNode [2020-08-18 21:47:47,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:47:47,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:47:47,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:47:47,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:47:47,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:47:47" (1/1) ... [2020-08-18 21:47:47,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:47:47" (1/1) ... [2020-08-18 21:47:47,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:47:47" (1/1) ... [2020-08-18 21:47:47,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:47:47" (1/1) ... [2020-08-18 21:47:47,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:47:47" (1/1) ... [2020-08-18 21:47:47,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:47:47" (1/1) ... [2020-08-18 21:47:47,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:47:47" (1/1) ... [2020-08-18 21:47:47,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:47:47,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:47:47,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:47:47,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:47:47,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:47:47" (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 [2020-08-18 21:47:47,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:47:47,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:47:47,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 21:47:47,589 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 21:47:47,589 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 21:47:47,589 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 21:47:47,590 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 21:47:47,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:47:47,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-18 21:47:47,591 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 21:47:47,592 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 21:47:47,592 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 21:47:47,592 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 21:47:47,592 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 21:47:47,592 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 21:47:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 21:47:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 21:47:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 21:47:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 21:47:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 21:47:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 21:47:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 21:47:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 21:47:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 21:47:47,595 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 21:47:47,595 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 21:47:47,595 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 21:47:47,596 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 21:47:47,596 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 21:47:47,596 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 21:47:47,596 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 21:47:47,597 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 21:47:47,597 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 21:47:47,597 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 21:47:47,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 21:47:47,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 21:47:47,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 21:47:47,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 21:47:47,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 21:47:47,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 21:47:47,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 21:47:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:47:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:47:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 21:47:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 21:47:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 21:47:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 21:47:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 21:47:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 21:47:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 21:47:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 21:47:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 21:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 21:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 21:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 21:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 21:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:47:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 21:47:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 21:47:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 21:47:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-18 21:47:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 21:47:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 21:47:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 21:47:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 21:47:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 21:47:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:47:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 21:47:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 21:47:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 21:47:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 21:47:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 21:47:47,605 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 21:47:47,605 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 21:47:47,606 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 21:47:47,606 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 21:47:47,606 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 21:47:47,607 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 21:47:47,607 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 21:47:47,607 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 21:47:47,607 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 21:47:47,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 21:47:47,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 21:47:47,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 21:47:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 21:47:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 21:47:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:47:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 21:47:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 21:47:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 21:47:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 21:47:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 21:47:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 21:47:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:47:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 21:47:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:47:48,562 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:47:48,562 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 21:47:48,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:47:48 BoogieIcfgContainer [2020-08-18 21:47:48,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:47:48,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:47:48,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:47:48,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:47:48,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:47:46" (1/3) ... [2020-08-18 21:47:48,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6caeba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:47:48, skipping insertion in model container [2020-08-18 21:47:48,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:47:47" (2/3) ... [2020-08-18 21:47:48,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6caeba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:47:48, skipping insertion in model container [2020-08-18 21:47:48,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:47:48" (3/3) ... [2020-08-18 21:47:48,576 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product51.cil.c [2020-08-18 21:47:48,586 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:47:48,594 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:47:48,606 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:47:48,631 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:47:48,632 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:47:48,632 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:47:48,632 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:47:48,632 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:47:48,632 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:47:48,632 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:47:48,633 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:47:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states. [2020-08-18 21:47:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 21:47:48,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:47:48,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:47:48,667 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:47:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:47:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1091923628, now seen corresponding path program 1 times [2020-08-18 21:47:48,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:47:48,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768469434] [2020-08-18 21:47:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:47:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:49,344 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:47:49,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:47:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:49,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:47:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:49,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:47:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:49,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:47:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:49,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:47:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:49,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:47:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:49,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 21:47:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:47:49,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768469434] [2020-08-18 21:47:49,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:47:49,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:47:49,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232543420] [2020-08-18 21:47:49,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:47:49,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:47:49,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:47:49,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:47:49,467 INFO L87 Difference]: Start difference. First operand 177 states. Second operand 3 states. [2020-08-18 21:47:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:47:50,649 INFO L93 Difference]: Finished difference Result 311 states and 407 transitions. [2020-08-18 21:47:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:47:50,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 21:47:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:47:50,666 INFO L225 Difference]: With dead ends: 311 [2020-08-18 21:47:50,666 INFO L226 Difference]: Without dead ends: 168 [2020-08-18 21:47:50,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:47:50,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-18 21:47:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2020-08-18 21:47:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-18 21:47:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-08-18 21:47:50,761 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 46 [2020-08-18 21:47:50,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:47:50,762 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-08-18 21:47:50,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:47:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-08-18 21:47:50,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 21:47:50,766 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:47:50,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:47:50,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:47:50,767 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:47:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:47:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash 644500822, now seen corresponding path program 1 times [2020-08-18 21:47:50,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:47:50,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896631787] [2020-08-18 21:47:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:47:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:51,185 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:47:51,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:47:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:51,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:47:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:51,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:47:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:51,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:47:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:51,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:47:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:51,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 21:47:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:51,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:47:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:47:51,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896631787] [2020-08-18 21:47:51,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:47:51,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:47:51,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762493646] [2020-08-18 21:47:51,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:47:51,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:47:51,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:47:51,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:47:51,279 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 4 states. [2020-08-18 21:47:51,701 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:47:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:47:52,608 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-08-18 21:47:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:47:52,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 21:47:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:47:52,612 INFO L225 Difference]: With dead ends: 238 [2020-08-18 21:47:52,612 INFO L226 Difference]: Without dead ends: 152 [2020-08-18 21:47:52,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:47:52,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-18 21:47:52,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2020-08-18 21:47:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 21:47:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-08-18 21:47:52,655 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 47 [2020-08-18 21:47:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:47:52,656 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-08-18 21:47:52,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:47:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-08-18 21:47:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 21:47:52,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:47:52,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:47:52,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:47:52,659 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:47:52,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:47:52,660 INFO L82 PathProgramCache]: Analyzing trace with hash -350015351, now seen corresponding path program 1 times [2020-08-18 21:47:52,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:47:52,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990228312] [2020-08-18 21:47:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:47:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:52,999 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:47:53,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:47:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:53,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:47:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:53,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:47:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:53,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:47:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:53,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:47:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:53,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:47:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:53,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 21:47:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:47:53,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990228312] [2020-08-18 21:47:53,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:47:53,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 21:47:53,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441482019] [2020-08-18 21:47:53,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:47:53,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:47:53,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:47:53,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:47:53,097 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 8 states. [2020-08-18 21:47:53,483 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:47:53,800 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:47:54,067 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:47:54,288 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:47:55,003 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:47:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:47:56,713 INFO L93 Difference]: Finished difference Result 427 states and 530 transitions. [2020-08-18 21:47:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:47:56,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 21:47:56,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:47:56,720 INFO L225 Difference]: With dead ends: 427 [2020-08-18 21:47:56,720 INFO L226 Difference]: Without dead ends: 326 [2020-08-18 21:47:56,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:47:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-18 21:47:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 268. [2020-08-18 21:47:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-18 21:47:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 324 transitions. [2020-08-18 21:47:56,791 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 324 transitions. Word has length 51 [2020-08-18 21:47:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:47:56,791 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 324 transitions. [2020-08-18 21:47:56,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:47:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 324 transitions. [2020-08-18 21:47:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 21:47:56,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:47:56,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:47:56,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:47:56,795 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:47:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:47:56,795 INFO L82 PathProgramCache]: Analyzing trace with hash -103520613, now seen corresponding path program 1 times [2020-08-18 21:47:56,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:47:56,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878424695] [2020-08-18 21:47:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:47:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:57,131 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:47:57,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:47:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:57,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:47:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:57,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:47:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:57,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:47:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:57,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:47:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:57,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 21:47:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:57,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 21:47:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:57,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 21:47:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:47:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:47:57,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878424695] [2020-08-18 21:47:57,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:47:57,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 21:47:57,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880722327] [2020-08-18 21:47:57,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 21:47:57,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:47:57,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 21:47:57,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:47:57,242 INFO L87 Difference]: Start difference. First operand 268 states and 324 transitions. Second operand 12 states. [2020-08-18 21:47:57,772 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:47:58,072 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:47:58,312 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:47:58,563 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:47:59,112 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:47:59,988 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:48:00,383 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 21:48:00,750 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 21:48:01,021 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:48:01,294 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:48:01,724 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 21:48:02,080 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 21:48:02,455 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:48:04,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:48:04,214 INFO L93 Difference]: Finished difference Result 1081 states and 1492 transitions. [2020-08-18 21:48:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 21:48:04,215 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-18 21:48:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:48:04,226 INFO L225 Difference]: With dead ends: 1081 [2020-08-18 21:48:04,226 INFO L226 Difference]: Without dead ends: 837 [2020-08-18 21:48:04,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-18 21:48:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-08-18 21:48:04,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 744. [2020-08-18 21:48:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-08-18 21:48:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 950 transitions. [2020-08-18 21:48:04,420 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 950 transitions. Word has length 57 [2020-08-18 21:48:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:48:04,421 INFO L479 AbstractCegarLoop]: Abstraction has 744 states and 950 transitions. [2020-08-18 21:48:04,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 21:48:04,421 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 950 transitions. [2020-08-18 21:48:04,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 21:48:04,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:48:04,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:48:04,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:48:04,427 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:48:04,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:48:04,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1065334495, now seen corresponding path program 1 times [2020-08-18 21:48:04,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:48:04,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783788022] [2020-08-18 21:48:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:48:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:04,739 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:48:04,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:48:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:04,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:48:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:04,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:48:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:04,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:48:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:04,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:48:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:04,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 21:48:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:04,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:48:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:04,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 21:48:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:04,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 21:48:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:48:04,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783788022] [2020-08-18 21:48:04,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:48:04,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:48:04,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379261995] [2020-08-18 21:48:04,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:48:04,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:48:04,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:48:04,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:48:04,853 INFO L87 Difference]: Start difference. First operand 744 states and 950 transitions. Second operand 6 states. [2020-08-18 21:48:05,197 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:48:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:48:07,028 INFO L93 Difference]: Finished difference Result 1779 states and 2437 transitions. [2020-08-18 21:48:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:48:07,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-18 21:48:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:48:07,041 INFO L225 Difference]: With dead ends: 1779 [2020-08-18 21:48:07,041 INFO L226 Difference]: Without dead ends: 1059 [2020-08-18 21:48:07,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:48:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2020-08-18 21:48:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 972. [2020-08-18 21:48:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 972 states. [2020-08-18 21:48:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1232 transitions. [2020-08-18 21:48:07,303 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1232 transitions. Word has length 61 [2020-08-18 21:48:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:48:07,303 INFO L479 AbstractCegarLoop]: Abstraction has 972 states and 1232 transitions. [2020-08-18 21:48:07,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:48:07,304 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1232 transitions. [2020-08-18 21:48:07,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-18 21:48:07,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:48:07,309 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:48:07,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:48:07,310 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:48:07,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:48:07,310 INFO L82 PathProgramCache]: Analyzing trace with hash 380759586, now seen corresponding path program 1 times [2020-08-18 21:48:07,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:48:07,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921451424] [2020-08-18 21:48:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:48:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,668 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:48:07,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:48:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:48:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:48:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:48:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:48:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 21:48:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:48:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 21:48:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 21:48:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 21:48:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 21:48:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 21:48:07,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921451424] [2020-08-18 21:48:07,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:48:07,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:48:07,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996936849] [2020-08-18 21:48:07,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:48:07,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:48:07,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:48:07,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:48:07,838 INFO L87 Difference]: Start difference. First operand 972 states and 1232 transitions. Second operand 10 states. [2020-08-18 21:48:08,586 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-18 21:48:09,147 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:48:10,932 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:48:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:48:12,722 INFO L93 Difference]: Finished difference Result 1881 states and 2481 transitions. [2020-08-18 21:48:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 21:48:12,723 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-08-18 21:48:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:48:12,733 INFO L225 Difference]: With dead ends: 1881 [2020-08-18 21:48:12,733 INFO L226 Difference]: Without dead ends: 1176 [2020-08-18 21:48:12,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-18 21:48:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2020-08-18 21:48:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1079. [2020-08-18 21:48:13,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1079 states. [2020-08-18 21:48:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1343 transitions. [2020-08-18 21:48:13,020 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1343 transitions. Word has length 88 [2020-08-18 21:48:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:48:13,022 INFO L479 AbstractCegarLoop]: Abstraction has 1079 states and 1343 transitions. [2020-08-18 21:48:13,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:48:13,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1343 transitions. [2020-08-18 21:48:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-18 21:48:13,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:48:13,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:48:13,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:48:13,034 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:48:13,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:48:13,035 INFO L82 PathProgramCache]: Analyzing trace with hash 605263964, now seen corresponding path program 1 times [2020-08-18 21:48:13,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:48:13,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961438575] [2020-08-18 21:48:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:48:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,287 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:48:13,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:48:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:48:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:48:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:48:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:48:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:48:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:48:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:48:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 21:48:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 21:48:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:48:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 21:48:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-18 21:48:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 21:48:13,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961438575] [2020-08-18 21:48:13,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:48:13,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:48:13,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130551304] [2020-08-18 21:48:13,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:48:13,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:48:13,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:48:13,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:48:13,468 INFO L87 Difference]: Start difference. First operand 1079 states and 1343 transitions. Second operand 10 states. [2020-08-18 21:48:14,446 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:48:14,683 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 21:48:14,951 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:48:15,207 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:48:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:48:16,308 INFO L93 Difference]: Finished difference Result 2275 states and 2959 transitions. [2020-08-18 21:48:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:48:16,308 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 128 [2020-08-18 21:48:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:48:16,316 INFO L225 Difference]: With dead ends: 2275 [2020-08-18 21:48:16,316 INFO L226 Difference]: Without dead ends: 1220 [2020-08-18 21:48:16,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:48:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2020-08-18 21:48:16,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1109. [2020-08-18 21:48:16,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2020-08-18 21:48:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1377 transitions. [2020-08-18 21:48:16,564 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1377 transitions. Word has length 128 [2020-08-18 21:48:16,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:48:16,565 INFO L479 AbstractCegarLoop]: Abstraction has 1109 states and 1377 transitions. [2020-08-18 21:48:16,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:48:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1377 transitions. [2020-08-18 21:48:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-18 21:48:16,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:48:16,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:48:16,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:48:16,570 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:48:16,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:48:16,571 INFO L82 PathProgramCache]: Analyzing trace with hash 845503710, now seen corresponding path program 1 times [2020-08-18 21:48:16,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:48:16,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557775978] [2020-08-18 21:48:16,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:48:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,828 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:48:16,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:48:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:48:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:48:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:48:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:48:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:48:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:48:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:48:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 21:48:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 21:48:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:48:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:16,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 21:48:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:17,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-18 21:48:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 21:48:17,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557775978] [2020-08-18 21:48:17,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:48:17,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 21:48:17,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362573034] [2020-08-18 21:48:17,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 21:48:17,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:48:17,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 21:48:17,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:48:17,028 INFO L87 Difference]: Start difference. First operand 1109 states and 1377 transitions. Second operand 12 states. [2020-08-18 21:48:17,728 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:48:17,962 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:48:18,183 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:48:18,845 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:48:19,109 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:48:19,346 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:48:20,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:48:20,442 INFO L93 Difference]: Finished difference Result 2085 states and 2667 transitions. [2020-08-18 21:48:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:48:20,443 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 128 [2020-08-18 21:48:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:48:20,450 INFO L225 Difference]: With dead ends: 2085 [2020-08-18 21:48:20,450 INFO L226 Difference]: Without dead ends: 1000 [2020-08-18 21:48:20,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 21:48:20,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2020-08-18 21:48:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 944. [2020-08-18 21:48:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-08-18 21:48:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1148 transitions. [2020-08-18 21:48:20,694 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1148 transitions. Word has length 128 [2020-08-18 21:48:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:48:20,695 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1148 transitions. [2020-08-18 21:48:20,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 21:48:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1148 transitions. [2020-08-18 21:48:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-18 21:48:20,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:48:20,702 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:48:20,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:48:20,702 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:48:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:48:20,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2030061671, now seen corresponding path program 1 times [2020-08-18 21:48:20,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:48:20,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624451354] [2020-08-18 21:48:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:48:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,065 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:48:21,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:48:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:48:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:48:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:48:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:48:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 21:48:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 21:48:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:48:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:48:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 21:48:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 21:48:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:48:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:48:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-18 21:48:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 21:48:21,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624451354] [2020-08-18 21:48:21,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:48:21,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:48:21,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169139354] [2020-08-18 21:48:21,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:48:21,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:48:21,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:48:21,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:48:21,230 INFO L87 Difference]: Start difference. First operand 944 states and 1148 transitions. Second operand 10 states. [2020-08-18 21:48:22,767 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:48:23,013 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:48:23,243 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:48:23,469 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:48:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:48:23,863 INFO L93 Difference]: Finished difference Result 1797 states and 2242 transitions. [2020-08-18 21:48:23,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:48:23,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 132 [2020-08-18 21:48:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:48:23,869 INFO L225 Difference]: With dead ends: 1797 [2020-08-18 21:48:23,870 INFO L226 Difference]: Without dead ends: 1032 [2020-08-18 21:48:23,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:48:23,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2020-08-18 21:48:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 976. [2020-08-18 21:48:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2020-08-18 21:48:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1182 transitions. [2020-08-18 21:48:24,053 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1182 transitions. Word has length 132 [2020-08-18 21:48:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:48:24,056 INFO L479 AbstractCegarLoop]: Abstraction has 976 states and 1182 transitions. [2020-08-18 21:48:24,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:48:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1182 transitions. [2020-08-18 21:48:24,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-18 21:48:24,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:48:24,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:48:24,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:48:24,062 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:48:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:48:24,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1755432535, now seen corresponding path program 1 times [2020-08-18 21:48:24,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:48:24,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494745489] [2020-08-18 21:48:24,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:48:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,344 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:48:24,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:48:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:48:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:48:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:48:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:48:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 21:48:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 21:48:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:48:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:48:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 21:48:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 21:48:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:48:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:48:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-18 21:48:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 21:48:24,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494745489] [2020-08-18 21:48:24,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:48:24,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:48:24,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681828650] [2020-08-18 21:48:24,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:48:24,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:48:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:48:24,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:48:24,483 INFO L87 Difference]: Start difference. First operand 976 states and 1182 transitions. Second operand 10 states. [2020-08-18 21:48:24,961 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:48:26,555 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:48:26,805 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:48:27,030 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:48:27,294 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:48:27,565 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:48:27,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:48:27,988 INFO L93 Difference]: Finished difference Result 1053 states and 1300 transitions. [2020-08-18 21:48:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 21:48:27,989 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 132 [2020-08-18 21:48:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:48:27,995 INFO L225 Difference]: With dead ends: 1053 [2020-08-18 21:48:27,996 INFO L226 Difference]: Without dead ends: 1050 [2020-08-18 21:48:27,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:48:27,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2020-08-18 21:48:28,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 976. [2020-08-18 21:48:28,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2020-08-18 21:48:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1177 transitions. [2020-08-18 21:48:28,180 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1177 transitions. Word has length 132 [2020-08-18 21:48:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:48:28,181 INFO L479 AbstractCegarLoop]: Abstraction has 976 states and 1177 transitions. [2020-08-18 21:48:28,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:48:28,181 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1177 transitions. [2020-08-18 21:48:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 21:48:28,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:48:28,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:48:28,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:48:28,186 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:48:28,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:48:28,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1244866615, now seen corresponding path program 1 times [2020-08-18 21:48:28,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:48:28,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249683818] [2020-08-18 21:48:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:48:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,499 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:48:28,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:48:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:48:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:48:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:48:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:48:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 21:48:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 21:48:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:48:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:48:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 21:48:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 21:48:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:48:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-18 21:48:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-18 21:48:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 21:48:28,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249683818] [2020-08-18 21:48:28,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:48:28,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 21:48:28,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310561005] [2020-08-18 21:48:28,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 21:48:28,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:48:28,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 21:48:28,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:48:28,733 INFO L87 Difference]: Start difference. First operand 976 states and 1177 transitions. Second operand 12 states. [2020-08-18 21:48:29,445 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:48:30,337 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:48:30,606 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 21:48:30,863 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 21:48:31,083 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:48:31,310 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:48:31,615 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:48:32,296 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:48:32,587 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 21:48:32,830 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 21:48:34,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:48:34,558 INFO L93 Difference]: Finished difference Result 2450 states and 3139 transitions. [2020-08-18 21:48:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 21:48:34,559 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 136 [2020-08-18 21:48:34,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:48:34,568 INFO L225 Difference]: With dead ends: 2450 [2020-08-18 21:48:34,569 INFO L226 Difference]: Without dead ends: 1653 [2020-08-18 21:48:34,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2020-08-18 21:48:34,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2020-08-18 21:48:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1471. [2020-08-18 21:48:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1471 states. [2020-08-18 21:48:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 1804 transitions. [2020-08-18 21:48:34,927 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 1804 transitions. Word has length 136 [2020-08-18 21:48:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:48:34,930 INFO L479 AbstractCegarLoop]: Abstraction has 1471 states and 1804 transitions. [2020-08-18 21:48:34,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 21:48:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 1804 transitions. [2020-08-18 21:48:34,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-08-18 21:48:34,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:48:34,937 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:48:34,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:48:34,937 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:48:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:48:34,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1705425798, now seen corresponding path program 2 times [2020-08-18 21:48:34,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:48:34,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137785287] [2020-08-18 21:48:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:48:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,321 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:48:35,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:48:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:48:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:48:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:48:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:48:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 21:48:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 21:48:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:48:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:48:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 21:48:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:48:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:48:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:48:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-18 21:48:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 21:48:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-18 21:48:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:48:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-18 21:48:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-08-18 21:48:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-08-18 21:48:35,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137785287] [2020-08-18 21:48:35,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:48:35,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 21:48:35,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117379991] [2020-08-18 21:48:35,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 21:48:35,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:48:35,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 21:48:35,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:48:35,700 INFO L87 Difference]: Start difference. First operand 1471 states and 1804 transitions. Second operand 14 states. [2020-08-18 21:48:36,258 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:48:36,866 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:48:37,407 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:48:37,682 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 21:48:37,981 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 21:48:38,228 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:48:38,526 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 21:48:38,804 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 21:48:40,689 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:48:40,976 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:48:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:48:41,914 INFO L93 Difference]: Finished difference Result 3362 states and 4500 transitions. [2020-08-18 21:48:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 21:48:41,915 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 193 [2020-08-18 21:48:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:48:41,927 INFO L225 Difference]: With dead ends: 3362 [2020-08-18 21:48:41,928 INFO L226 Difference]: Without dead ends: 2121 [2020-08-18 21:48:41,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 21:48:41,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2020-08-18 21:48:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1361. [2020-08-18 21:48:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1361 states. [2020-08-18 21:48:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1680 transitions. [2020-08-18 21:48:42,233 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1680 transitions. Word has length 193 [2020-08-18 21:48:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:48:42,234 INFO L479 AbstractCegarLoop]: Abstraction has 1361 states and 1680 transitions. [2020-08-18 21:48:42,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 21:48:42,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1680 transitions. [2020-08-18 21:48:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-08-18 21:48:42,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:48:42,240 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:48:42,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:48:42,241 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:48:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:48:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1692744000, now seen corresponding path program 3 times [2020-08-18 21:48:42,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:48:42,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115416264] [2020-08-18 21:48:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:48:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,611 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:48:42,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:48:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:48:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:48:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:48:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:48:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 21:48:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 21:48:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:48:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:48:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 21:48:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:48:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:48:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:48:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-18 21:48:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-18 21:48:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:48:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:48:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:48:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 21:48:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 21:48:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:48:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 46 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-08-18 21:48:42,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115416264] [2020-08-18 21:48:42,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:48:42,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:48:42,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598482570] [2020-08-18 21:48:42,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:48:42,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:48:42,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:48:42,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:48:42,950 INFO L87 Difference]: Start difference. First operand 1361 states and 1680 transitions. Second operand 13 states.