/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_productSimulator.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:25:11,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:25:11,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:25:11,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:25:11,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:25:11,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:25:11,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:25:11,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:25:11,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:25:11,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:25:11,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:25:11,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:25:11,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:25:11,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:25:11,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:25:11,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:25:11,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:25:11,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:25:11,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:25:11,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:25:11,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:25:11,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:25:11,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:25:11,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:25:11,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:25:11,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:25:11,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:25:11,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:25:11,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:25:11,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:25:11,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:25:11,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:25:11,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:25:11,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:25:11,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:25:11,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:25:11,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:25:11,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:25:11,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:25:11,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:25:11,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:25:11,411 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 [2020-08-21 16:25:11,449 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:25:11,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:25:11,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:25:11,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:25:11,451 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:25:11,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:25:11,452 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:25:11,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:25:11,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:25:11,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:25:11,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:25:11,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:25:11,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:25:11,454 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:25:11,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:25:11,455 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:25:11,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:25:11,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:25:11,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:25:11,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:25:11,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:25:11,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:25:11,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:25:11,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:25:11,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:25:11,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:25:11,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:25:11,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:25:11,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:25:11,458 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:25:11,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:25:11,795 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:25:11,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:25:11,810 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:25:11,812 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:25:11,813 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_productSimulator.cil.c [2020-08-21 16:25:11,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5228d6071/a917ff30413f4aa79b694e20f4f7c4c0/FLAGacde647a4 [2020-08-21 16:25:12,408 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:25:12,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_productSimulator.cil.c [2020-08-21 16:25:12,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5228d6071/a917ff30413f4aa79b694e20f4f7c4c0/FLAGacde647a4 [2020-08-21 16:25:12,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5228d6071/a917ff30413f4aa79b694e20f4f7c4c0 [2020-08-21 16:25:12,710 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:25:12,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:25:12,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:25:12,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:25:12,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:25:12,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:25:12" (1/1) ... [2020-08-21 16:25:12,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5d0024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:25:12, skipping insertion in model container [2020-08-21 16:25:12,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:25:12" (1/1) ... [2020-08-21 16:25:12,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:25:12,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:25:13,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:25:13,106 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:25:13,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:25:13,358 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:25:13,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:25:13 WrapperNode [2020-08-21 16:25:13,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:25:13,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:25:13,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:25:13,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:25:13,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:25:13" (1/1) ... [2020-08-21 16:25:13,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:25:13" (1/1) ... [2020-08-21 16:25:13,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:25:13" (1/1) ... [2020-08-21 16:25:13,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:25:13" (1/1) ... [2020-08-21 16:25:13,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:25:13" (1/1) ... [2020-08-21 16:25:13,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:25:13" (1/1) ... [2020-08-21 16:25:13,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:25:13" (1/1) ... [2020-08-21 16:25:13,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:25:13,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:25:13,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:25:13,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:25:13,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:25:13" (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 [2020-08-21 16:25:13,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:25:13,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:25:13,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 16:25:13,512 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 16:25:13,513 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 16:25:13,513 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 16:25:13,513 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 16:25:13,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:25:13,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 16:25:13,514 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 16:25:13,514 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2020-08-21 16:25:13,515 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__highWaterSensor [2020-08-21 16:25:13,515 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2020-08-21 16:25:13,515 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__lowWaterSensor [2020-08-21 16:25:13,515 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2020-08-21 16:25:13,516 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__methaneAlarm [2020-08-21 16:25:13,516 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 16:25:13,516 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2020-08-21 16:25:13,516 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__role__methaneQuery [2020-08-21 16:25:13,516 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 16:25:13,517 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 16:25:13,517 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 16:25:13,517 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 16:25:13,518 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 16:25:13,519 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 16:25:13,520 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 16:25:13,520 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 16:25:13,520 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 16:25:13,521 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 16:25:13,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 16:25:13,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 16:25:13,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 16:25:13,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 16:25:13,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 16:25:13,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 16:25:13,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 16:25:13,521 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 16:25:13,522 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 16:25:13,522 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 16:25:13,522 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 16:25:13,522 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 16:25:13,522 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 16:25:13,522 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 16:25:13,522 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 16:25:13,522 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 16:25:13,522 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 16:25:13,523 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 16:25:13,523 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 16:25:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:25:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:25:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 16:25:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 16:25:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 16:25:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 16:25:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 16:25:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 16:25:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 16:25:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 16:25:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 16:25:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 16:25:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 16:25:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 16:25:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 16:25:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:25:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 16:25:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 16:25:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 16:25:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 16:25:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 16:25:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 16:25:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 16:25:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 16:25:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 16:25:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 16:25:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 16:25:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 16:25:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 16:25:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 16:25:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2020-08-21 16:25:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 16:25:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__highWaterSensor [2020-08-21 16:25:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2020-08-21 16:25:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 16:25:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__lowWaterSensor [2020-08-21 16:25:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2020-08-21 16:25:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 16:25:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__methaneAlarm [2020-08-21 16:25:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2020-08-21 16:25:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__role__methaneQuery [2020-08-21 16:25:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 16:25:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 16:25:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 16:25:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 16:25:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 16:25:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 16:25:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 16:25:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:25:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 16:25:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 16:25:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:25:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 16:25:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 16:25:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:25:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 16:25:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 16:25:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 16:25:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 16:25:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:25:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 16:25:13,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:25:14,689 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:25:14,690 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 16:25:14,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:25:14 BoogieIcfgContainer [2020-08-21 16:25:14,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:25:14,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:25:14,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:25:14,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:25:14,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:25:12" (1/3) ... [2020-08-21 16:25:14,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff00dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:25:14, skipping insertion in model container [2020-08-21 16:25:14,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:25:13" (2/3) ... [2020-08-21 16:25:14,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff00dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:25:14, skipping insertion in model container [2020-08-21 16:25:14,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:25:14" (3/3) ... [2020-08-21 16:25:14,704 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_productSimulator.cil.c [2020-08-21 16:25:14,715 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:25:14,724 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:25:14,740 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:25:14,768 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:25:14,768 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:25:14,768 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:25:14,768 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:25:14,769 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:25:14,769 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:25:14,769 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:25:14,770 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:25:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states. [2020-08-21 16:25:14,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 16:25:14,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:25:14,818 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:25:14,819 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:25:14,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:25:14,826 INFO L82 PathProgramCache]: Analyzing trace with hash 88276295, now seen corresponding path program 1 times [2020-08-21 16:25:14,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:25:14,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396788046] [2020-08-21 16:25:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:25:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,643 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 16:25:15,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:25:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 16:25:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:25:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:25:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 16:25:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 16:25:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:25:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 16:25:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 16:25:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 16:25:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-21 16:25:15,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396788046] [2020-08-21 16:25:15,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:25:15,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:25:15,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703308964] [2020-08-21 16:25:15,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:25:15,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:25:15,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:25:15,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:25:15,940 INFO L87 Difference]: Start difference. First operand 245 states. Second operand 5 states. [2020-08-21 16:25:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:25:18,241 INFO L93 Difference]: Finished difference Result 442 states and 581 transitions. [2020-08-21 16:25:18,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:25:18,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-08-21 16:25:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:25:18,260 INFO L225 Difference]: With dead ends: 442 [2020-08-21 16:25:18,260 INFO L226 Difference]: Without dead ends: 251 [2020-08-21 16:25:18,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:25:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-08-21 16:25:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 202. [2020-08-21 16:25:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-08-21 16:25:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 247 transitions. [2020-08-21 16:25:18,459 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 247 transitions. Word has length 78 [2020-08-21 16:25:18,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:25:18,462 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 247 transitions. [2020-08-21 16:25:18,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:25:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 247 transitions. [2020-08-21 16:25:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 16:25:18,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:25:18,479 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:25:18,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:25:18,480 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:25:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:25:18,480 INFO L82 PathProgramCache]: Analyzing trace with hash 128874418, now seen corresponding path program 1 times [2020-08-21 16:25:18,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:25:18,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859110217] [2020-08-21 16:25:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:25:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,860 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 16:25:18,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:25:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 16:25:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:25:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:25:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 16:25:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 16:25:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:25:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 16:25:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 16:25:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 16:25:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-21 16:25:18,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859110217] [2020-08-21 16:25:18,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:25:18,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 16:25:18,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821536347] [2020-08-21 16:25:18,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:25:18,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:25:18,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:25:18,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:25:18,969 INFO L87 Difference]: Start difference. First operand 202 states and 247 transitions. Second operand 6 states. [2020-08-21 16:25:19,730 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-08-21 16:25:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:25:21,512 INFO L93 Difference]: Finished difference Result 366 states and 459 transitions. [2020-08-21 16:25:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:25:21,513 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-08-21 16:25:21,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:25:21,519 INFO L225 Difference]: With dead ends: 366 [2020-08-21 16:25:21,519 INFO L226 Difference]: Without dead ends: 235 [2020-08-21 16:25:21,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:25:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-08-21 16:25:21,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2020-08-21 16:25:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-08-21 16:25:21,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 235 transitions. [2020-08-21 16:25:21,574 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 235 transitions. Word has length 79 [2020-08-21 16:25:21,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:25:21,574 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 235 transitions. [2020-08-21 16:25:21,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:25:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 235 transitions. [2020-08-21 16:25:21,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 16:25:21,577 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:25:21,577 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:25:21,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:25:21,577 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:25:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:25:21,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2075074883, now seen corresponding path program 1 times [2020-08-21 16:25:21,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:25:21,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132050632] [2020-08-21 16:25:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:25:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,013 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 16:25:22,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:25:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 16:25:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:25:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:25:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 16:25:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 16:25:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:25:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 16:25:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 16:25:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 16:25:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-21 16:25:22,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132050632] [2020-08-21 16:25:22,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:25:22,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 16:25:22,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310661001] [2020-08-21 16:25:22,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:25:22,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:25:22,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:25:22,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:25:22,197 INFO L87 Difference]: Start difference. First operand 193 states and 235 transitions. Second operand 12 states. [2020-08-21 16:25:22,806 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 16:25:23,456 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 211 [2020-08-21 16:25:24,295 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2020-08-21 16:25:25,330 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 16:25:25,674 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-08-21 16:25:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:25:29,431 INFO L93 Difference]: Finished difference Result 628 states and 796 transitions. [2020-08-21 16:25:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 16:25:29,432 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-08-21 16:25:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:25:29,443 INFO L225 Difference]: With dead ends: 628 [2020-08-21 16:25:29,444 INFO L226 Difference]: Without dead ends: 476 [2020-08-21 16:25:29,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-08-21 16:25:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-08-21 16:25:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 385. [2020-08-21 16:25:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-08-21 16:25:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 480 transitions. [2020-08-21 16:25:29,598 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 480 transitions. Word has length 84 [2020-08-21 16:25:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:25:29,598 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 480 transitions. [2020-08-21 16:25:29,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:25:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 480 transitions. [2020-08-21 16:25:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-21 16:25:29,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:25:29,601 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:25:29,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:25:29,601 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:25:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:25:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1129127896, now seen corresponding path program 1 times [2020-08-21 16:25:29,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:25:29,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968384054] [2020-08-21 16:25:29,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:25:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,012 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 16:25:30,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:25:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 16:25:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:25:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:25:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 16:25:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 16:25:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:25:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 16:25:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 16:25:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 16:25:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-21 16:25:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-21 16:25:30,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968384054] [2020-08-21 16:25:30,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:25:30,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-21 16:25:30,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184404308] [2020-08-21 16:25:30,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 16:25:30,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:25:30,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 16:25:30,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-08-21 16:25:30,254 INFO L87 Difference]: Start difference. First operand 385 states and 480 transitions. Second operand 16 states. [2020-08-21 16:25:31,060 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 16:25:31,762 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 211 [2020-08-21 16:25:32,613 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2020-08-21 16:25:33,384 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-08-21 16:25:34,279 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 16:25:35,408 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2020-08-21 16:25:36,237 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 215 [2020-08-21 16:25:36,946 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 215 [2020-08-21 16:25:37,262 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-08-21 16:25:37,619 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-08-21 16:25:38,108 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-08-21 16:25:38,552 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-08-21 16:25:39,079 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-08-21 16:25:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:25:43,708 INFO L93 Difference]: Finished difference Result 1582 states and 2206 transitions. [2020-08-21 16:25:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 16:25:43,710 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2020-08-21 16:25:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:25:43,720 INFO L225 Difference]: With dead ends: 1582 [2020-08-21 16:25:43,721 INFO L226 Difference]: Without dead ends: 1238 [2020-08-21 16:25:43,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 16:25:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2020-08-21 16:25:44,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1109. [2020-08-21 16:25:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2020-08-21 16:25:44,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1462 transitions. [2020-08-21 16:25:44,040 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1462 transitions. Word has length 90 [2020-08-21 16:25:44,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:25:44,041 INFO L479 AbstractCegarLoop]: Abstraction has 1109 states and 1462 transitions. [2020-08-21 16:25:44,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 16:25:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1462 transitions. [2020-08-21 16:25:44,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-21 16:25:44,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:25:44,045 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:25:44,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:25:44,046 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:25:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:25:44,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1905240978, now seen corresponding path program 1 times [2020-08-21 16:25:44,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:25:44,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65462667] [2020-08-21 16:25:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:25:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,347 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 16:25:44,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:25:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 16:25:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:25:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:25:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 16:25:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 16:25:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:25:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 16:25:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 16:25:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 16:25:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 16:25:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 16:25:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-21 16:25:44,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65462667] [2020-08-21 16:25:44,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:25:44,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 16:25:44,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794416925] [2020-08-21 16:25:44,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:25:44,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:25:44,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:25:44,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:25:44,492 INFO L87 Difference]: Start difference. First operand 1109 states and 1462 transitions. Second operand 8 states. [2020-08-21 16:25:44,919 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 16:25:48,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:25:48,519 INFO L93 Difference]: Finished difference Result 2674 states and 3837 transitions. [2020-08-21 16:25:48,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 16:25:48,520 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-08-21 16:25:48,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:25:48,531 INFO L225 Difference]: With dead ends: 2674 [2020-08-21 16:25:48,531 INFO L226 Difference]: Without dead ends: 1606 [2020-08-21 16:25:48,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-08-21 16:25:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2020-08-21 16:25:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1507. [2020-08-21 16:25:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1507 states. [2020-08-21 16:25:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2004 transitions. [2020-08-21 16:25:48,801 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2004 transitions. Word has length 94 [2020-08-21 16:25:48,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:25:48,802 INFO L479 AbstractCegarLoop]: Abstraction has 1507 states and 2004 transitions. [2020-08-21 16:25:48,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:25:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2004 transitions. [2020-08-21 16:25:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-21 16:25:48,806 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:25:48,807 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-08-21 16:25:48,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:25:48,807 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:25:48,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:25:48,807 INFO L82 PathProgramCache]: Analyzing trace with hash -509299228, now seen corresponding path program 1 times [2020-08-21 16:25:48,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:25:48,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125984716] [2020-08-21 16:25:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:25:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,166 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 16:25:49,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:25:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 16:25:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:25:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:25:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 16:25:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 16:25:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:25:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 16:25:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 16:25:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 16:25:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 16:25:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:25:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 16:25:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-21 16:25:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 16:25:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-08-21 16:25:49,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125984716] [2020-08-21 16:25:49,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:25:49,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 16:25:49,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471439914] [2020-08-21 16:25:49,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:25:49,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:25:49,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:25:49,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:25:49,385 INFO L87 Difference]: Start difference. First operand 1507 states and 2004 transitions. Second operand 12 states. [2020-08-21 16:25:50,204 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 210 [2020-08-21 16:25:51,097 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 16:25:54,377 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 16:25:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:25:58,163 INFO L93 Difference]: Finished difference Result 2888 states and 4054 transitions. [2020-08-21 16:25:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 16:25:58,164 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 122 [2020-08-21 16:25:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:25:58,179 INFO L225 Difference]: With dead ends: 2888 [2020-08-21 16:25:58,179 INFO L226 Difference]: Without dead ends: 1787 [2020-08-21 16:25:58,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 16:25:58,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2020-08-21 16:25:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1658. [2020-08-21 16:25:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2020-08-21 16:25:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2197 transitions. [2020-08-21 16:25:58,734 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2197 transitions. Word has length 122 [2020-08-21 16:25:58,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:25:58,735 INFO L479 AbstractCegarLoop]: Abstraction has 1658 states and 2197 transitions. [2020-08-21 16:25:58,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:25:58,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2197 transitions. [2020-08-21 16:25:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-08-21 16:25:58,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:25:58,741 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:25:58,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:25:58,742 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:25:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:25:58,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1104863335, now seen corresponding path program 1 times [2020-08-21 16:25:58,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:25:58,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730477994] [2020-08-21 16:25:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:25:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,130 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 16:25:59,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:25:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 16:25:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:25:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:25:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:25:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 16:25:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 16:25:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:25:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 16:25:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 16:25:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 16:25:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:25:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:25:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:25:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 16:25:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-21 16:25:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-21 16:25:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:25:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-21 16:25:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-08-21 16:25:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:25:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-08-21 16:25:59,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730477994] [2020-08-21 16:25:59,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:25:59,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 16:25:59,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572153184] [2020-08-21 16:25:59,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 16:25:59,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:25:59,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 16:25:59,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:25:59,507 INFO L87 Difference]: Start difference. First operand 1658 states and 2197 transitions. Second operand 11 states. [2020-08-21 16:26:02,010 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-08-21 16:26:02,351 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-08-21 16:26:02,680 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-08-21 16:26:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:26:04,528 INFO L93 Difference]: Finished difference Result 3027 states and 4240 transitions. [2020-08-21 16:26:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 16:26:04,528 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 170 [2020-08-21 16:26:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:26:04,541 INFO L225 Difference]: With dead ends: 3027 [2020-08-21 16:26:04,542 INFO L226 Difference]: Without dead ends: 1798 [2020-08-21 16:26:04,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-08-21 16:26:04,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2020-08-21 16:26:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1658. [2020-08-21 16:26:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2020-08-21 16:26:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2195 transitions. [2020-08-21 16:26:04,900 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2195 transitions. Word has length 170 [2020-08-21 16:26:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:26:04,900 INFO L479 AbstractCegarLoop]: Abstraction has 1658 states and 2195 transitions. [2020-08-21 16:26:04,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 16:26:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2195 transitions. [2020-08-21 16:26:04,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-21 16:26:04,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:26:04,907 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:26:04,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:26:04,907 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:26:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:26:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1658452204, now seen corresponding path program 1 times [2020-08-21 16:26:04,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:26:04,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495598365] [2020-08-21 16:26:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:26:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,244 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 16:26:05,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:26:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:26:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 16:26:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:26:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:26:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:26:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:26:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 16:26:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 16:26:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:26:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 16:26:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 16:26:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:26:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:26:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:26:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:26:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:26:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:26:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:26:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:26:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 16:26:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:26:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-21 16:26:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-21 16:26:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:26:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:26:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:26:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-21 16:26:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-21 16:26:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:26:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-08-21 16:26:05,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495598365] [2020-08-21 16:26:05,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:26:05,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 16:26:05,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801518208] [2020-08-21 16:26:05,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:26:05,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:26:05,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:26:05,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:26:05,667 INFO L87 Difference]: Start difference. First operand 1658 states and 2195 transitions. Second operand 12 states. [2020-08-21 16:26:08,303 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-08-21 16:26:08,633 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-08-21 16:26:08,939 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-08-21 16:26:09,256 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 211