/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --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_product39.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:25:57,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:25:57,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:25:57,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:25:57,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:25:57,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:25:57,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:25:57,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:25:57,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:25:57,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:25:57,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:25:57,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:25:57,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:25:57,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:25:57,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:25:57,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:25:57,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:25:57,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:25:57,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:25:57,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:25:57,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:25:57,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:25:57,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:25:57,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:25:57,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:25:57,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:25:57,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:25:57,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:25:57,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:25:57,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:25:57,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:25:57,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:25:57,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:25:57,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:25:57,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:25:57,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:25:57,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:25:57,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:25:57,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:25:57,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:25:57,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:25:57,504 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 20:25:57,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:25:57,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:25:57,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:25:57,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:25:57,530 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:25:57,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:25:57,532 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:25:57,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:25:57,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:25:57,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:25:57,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:25:57,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:25:57,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:25:57,533 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:25:57,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:25:57,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:25:57,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:25:57,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:25:57,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:25:57,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:25:57,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:25:57,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:25:57,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:25:57,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:25:57,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:25:57,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:25:57,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:25:57,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:25:57,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:25:57,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:25:57,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:25:57,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:25:57,852 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:25:57,854 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:25:57,855 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:25:57,856 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product39.cil.c [2020-08-21 20:25:57,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/478322045/802aa6faa49f43a3b76247b80559a4c8/FLAGfb650f73e [2020-08-21 20:25:58,467 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:25:58,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product39.cil.c [2020-08-21 20:25:58,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/478322045/802aa6faa49f43a3b76247b80559a4c8/FLAGfb650f73e [2020-08-21 20:25:58,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/478322045/802aa6faa49f43a3b76247b80559a4c8 [2020-08-21 20:25:58,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:25:58,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:25:58,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:25:58,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:25:58,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:25:58,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:25:58" (1/1) ... [2020-08-21 20:25:58,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19fb1f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:25:58, skipping insertion in model container [2020-08-21 20:25:58,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:25:58" (1/1) ... [2020-08-21 20:25:58,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:25:58,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:25:59,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:25:59,171 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:25:59,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:25:59,430 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:25:59,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:25:59 WrapperNode [2020-08-21 20:25:59,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:25:59,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:25:59,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:25:59,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:25:59,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:25:59" (1/1) ... [2020-08-21 20:25:59,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:25:59" (1/1) ... [2020-08-21 20:25:59,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:25:59" (1/1) ... [2020-08-21 20:25:59,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:25:59" (1/1) ... [2020-08-21 20:25:59,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:25:59" (1/1) ... [2020-08-21 20:25:59,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:25:59" (1/1) ... [2020-08-21 20:25:59,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:25:59" (1/1) ... [2020-08-21 20:25:59,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:25:59,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:25:59,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:25:59,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:25:59,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:25:59" (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 20:25:59,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:25:59,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:25:59,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 20:25:59,608 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 20:25:59,609 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 20:25:59,609 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 20:25:59,610 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 20:25:59,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 20:25:59,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 20:25:59,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 20:25:59,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 20:25:59,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 20:25:59,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 20:25:59,612 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 20:25:59,613 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 20:25:59,613 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 20:25:59,614 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 20:25:59,614 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 20:25:59,614 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 20:25:59,614 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 20:25:59,614 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 20:25:59,614 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 20:25:59,615 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 20:25:59,615 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 20:25:59,615 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 20:25:59,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 20:25:59,616 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 20:25:59,616 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 20:25:59,616 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 20:25:59,616 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 20:25:59,616 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 20:25:59,617 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 20:25:59,617 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 20:25:59,617 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 20:25:59,617 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 20:25:59,617 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 20:25:59,617 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 20:25:59,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:25:59,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 20:25:59,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:25:59,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:25:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 20:25:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 20:25:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 20:25:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 20:25:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 20:25:59,620 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 20:25:59,620 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 20:25:59,620 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 20:25:59,620 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 20:25:59,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 20:25:59,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 20:25:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 20:25:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 20:25:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 20:25:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 20:25:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 20:25:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 20:25:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 20:25:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 20:25:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 20:25:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 20:25:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 20:25:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 20:25:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 20:25:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 20:25:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 20:25:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 20:25:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 20:25:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 20:25:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 20:25:59,625 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 20:25:59,626 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 20:25:59,626 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 20:25:59,626 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 20:25:59,626 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 20:25:59,627 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 20:25:59,628 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 20:25:59,628 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 20:25:59,628 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 20:25:59,628 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 20:25:59,629 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 20:25:59,630 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 20:25:59,630 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 20:25:59,630 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 20:25:59,630 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 20:25:59,630 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 20:25:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 20:25:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:25:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:25:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 20:25:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:26:00,707 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:26:00,707 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 20:26:00,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:26:00 BoogieIcfgContainer [2020-08-21 20:26:00,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:26:00,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:26:00,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:26:00,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:26:00,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:25:58" (1/3) ... [2020-08-21 20:26:00,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b24a470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:26:00, skipping insertion in model container [2020-08-21 20:26:00,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:25:59" (2/3) ... [2020-08-21 20:26:00,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b24a470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:26:00, skipping insertion in model container [2020-08-21 20:26:00,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:26:00" (3/3) ... [2020-08-21 20:26:00,721 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product39.cil.c [2020-08-21 20:26:00,731 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:26:00,740 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:26:00,754 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:26:00,778 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:26:00,778 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:26:00,779 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:26:00,779 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:26:00,779 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:26:00,779 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:26:00,779 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:26:00,779 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:26:00,801 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-08-21 20:26:00,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 20:26:00,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:00,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:26:00,813 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:00,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:00,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1123456625, now seen corresponding path program 1 times [2020-08-21 20:26:00,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:00,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408526084] [2020-08-21 20:26:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:26:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:01,485 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:26:01,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:26:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:01,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:26:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:01,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:26:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:01,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:26:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:01,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:26:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:01,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 20:26:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:01,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 20:26:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:26:01,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408526084] [2020-08-21 20:26:01,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:26:01,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:26:01,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891386248] [2020-08-21 20:26:01,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:26:01,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:26:01,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:26:01,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:26:01,631 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 3 states. [2020-08-21 20:26:02,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:26:02,853 INFO L93 Difference]: Finished difference Result 307 states and 401 transitions. [2020-08-21 20:26:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:26:02,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 20:26:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:26:02,874 INFO L225 Difference]: With dead ends: 307 [2020-08-21 20:26:02,875 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 20:26:02,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:26:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 20:26:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 132. [2020-08-21 20:26:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-21 20:26:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2020-08-21 20:26:02,989 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 46 [2020-08-21 20:26:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:26:02,990 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2020-08-21 20:26:02,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:26:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2020-08-21 20:26:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 20:26:02,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:02,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:26:02,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:26:02,995 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:02,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:02,995 INFO L82 PathProgramCache]: Analyzing trace with hash -790150173, now seen corresponding path program 1 times [2020-08-21 20:26:02,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:02,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777529933] [2020-08-21 20:26:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:26:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:03,311 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:26:03,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:26:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:03,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:26:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:03,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:26:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:03,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:26:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:03,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:26:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:03,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 20:26:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:03,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 20:26:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:26:03,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777529933] [2020-08-21 20:26:03,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:26:03,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 20:26:03,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604543038] [2020-08-21 20:26:03,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 20:26:03,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:26:03,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 20:26:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 20:26:03,355 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand 4 states. [2020-08-21 20:26:03,780 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:26:04,569 INFO L93 Difference]: Finished difference Result 234 states and 284 transitions. [2020-08-21 20:26:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:26:04,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 20:26:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:26:04,573 INFO L225 Difference]: With dead ends: 234 [2020-08-21 20:26:04,574 INFO L226 Difference]: Without dead ends: 150 [2020-08-21 20:26:04,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:26:04,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-21 20:26:04,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2020-08-21 20:26:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-21 20:26:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2020-08-21 20:26:04,640 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 47 [2020-08-21 20:26:04,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:26:04,641 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2020-08-21 20:26:04,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 20:26:04,641 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2020-08-21 20:26:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 20:26:04,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:04,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:26:04,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:26:04,647 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:04,648 INFO L82 PathProgramCache]: Analyzing trace with hash 271076632, now seen corresponding path program 1 times [2020-08-21 20:26:04,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:04,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100188272] [2020-08-21 20:26:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:26:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:05,027 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:26:05,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:26:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:05,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:26:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:05,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:26:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:05,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:26:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:05,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:26:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:05,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 20:26:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:05,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 20:26:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:26:05,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100188272] [2020-08-21 20:26:05,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:26:05,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 20:26:05,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506340777] [2020-08-21 20:26:05,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 20:26:05,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:26:05,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 20:26:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 20:26:05,159 INFO L87 Difference]: Start difference. First operand 123 states and 143 transitions. Second operand 8 states. [2020-08-21 20:26:05,549 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:26:05,906 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:06,157 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:06,403 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:07,192 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:26:09,019 INFO L93 Difference]: Finished difference Result 421 states and 521 transitions. [2020-08-21 20:26:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:26:09,020 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-21 20:26:09,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:26:09,026 INFO L225 Difference]: With dead ends: 421 [2020-08-21 20:26:09,026 INFO L226 Difference]: Without dead ends: 322 [2020-08-21 20:26:09,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 20:26:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-08-21 20:26:09,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 264. [2020-08-21 20:26:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-21 20:26:09,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 318 transitions. [2020-08-21 20:26:09,102 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 318 transitions. Word has length 51 [2020-08-21 20:26:09,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:26:09,103 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 318 transitions. [2020-08-21 20:26:09,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 20:26:09,103 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 318 transitions. [2020-08-21 20:26:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 20:26:09,105 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:09,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:26:09,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:26:09,106 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:09,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:09,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1813365187, now seen corresponding path program 1 times [2020-08-21 20:26:09,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:09,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744081657] [2020-08-21 20:26:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:26:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:09,493 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:26:09,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:26:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:09,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:26:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:09,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:26:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:09,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:26:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:09,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:26:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:09,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 20:26:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:09,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 20:26:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:09,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 20:26:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:26:09,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744081657] [2020-08-21 20:26:09,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:26:09,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 20:26:09,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488741118] [2020-08-21 20:26:09,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 20:26:09,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:26:09,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 20:26:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:26:09,620 INFO L87 Difference]: Start difference. First operand 264 states and 318 transitions. Second operand 12 states. [2020-08-21 20:26:10,112 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:26:10,424 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:10,686 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:10,964 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:11,531 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:12,344 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:12,741 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 20:26:13,071 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 20:26:13,384 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:26:13,684 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 20:26:14,135 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 20:26:14,479 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 20:26:14,745 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:26:16,444 INFO L93 Difference]: Finished difference Result 1065 states and 1468 transitions. [2020-08-21 20:26:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 20:26:16,444 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-21 20:26:16,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:26:16,458 INFO L225 Difference]: With dead ends: 1065 [2020-08-21 20:26:16,459 INFO L226 Difference]: Without dead ends: 825 [2020-08-21 20:26:16,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-21 20:26:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2020-08-21 20:26:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 732. [2020-08-21 20:26:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2020-08-21 20:26:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 932 transitions. [2020-08-21 20:26:16,666 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 932 transitions. Word has length 57 [2020-08-21 20:26:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:26:16,667 INFO L479 AbstractCegarLoop]: Abstraction has 732 states and 932 transitions. [2020-08-21 20:26:16,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 20:26:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 932 transitions. [2020-08-21 20:26:16,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 20:26:16,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:16,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:26:16,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:26:16,671 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2128676035, now seen corresponding path program 1 times [2020-08-21 20:26:16,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:16,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351185667] [2020-08-21 20:26:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:26:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:16,951 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:26:16,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:26:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:16,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:26:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:16,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:26:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:16,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:26:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:16,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:26:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:17,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 20:26:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:17,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:26:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:17,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 20:26:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:17,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 20:26:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:26:17,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351185667] [2020-08-21 20:26:17,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:26:17,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:26:17,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052414948] [2020-08-21 20:26:17,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:26:17,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:26:17,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:26:17,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:26:17,084 INFO L87 Difference]: Start difference. First operand 732 states and 932 transitions. Second operand 6 states. [2020-08-21 20:26:17,401 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:26:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:26:19,184 INFO L93 Difference]: Finished difference Result 1759 states and 2407 transitions. [2020-08-21 20:26:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 20:26:19,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 20:26:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:26:19,195 INFO L225 Difference]: With dead ends: 1759 [2020-08-21 20:26:19,195 INFO L226 Difference]: Without dead ends: 1051 [2020-08-21 20:26:19,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:26:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2020-08-21 20:26:19,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 964. [2020-08-21 20:26:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2020-08-21 20:26:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1220 transitions. [2020-08-21 20:26:19,427 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1220 transitions. Word has length 61 [2020-08-21 20:26:19,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:26:19,428 INFO L479 AbstractCegarLoop]: Abstraction has 964 states and 1220 transitions. [2020-08-21 20:26:19,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:26:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1220 transitions. [2020-08-21 20:26:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 20:26:19,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:19,433 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:26:19,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:26:19,433 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:19,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:19,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1754610703, now seen corresponding path program 1 times [2020-08-21 20:26:19,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:19,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511135575] [2020-08-21 20:26:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:26:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,761 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:26:19,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:26:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:26:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:26:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:26:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:26:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 20:26:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 20:26:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 20:26:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 20:26:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 20:26:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 20:26:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 20:26:19,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511135575] [2020-08-21 20:26:19,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:26:19,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 20:26:19,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576603033] [2020-08-21 20:26:19,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 20:26:19,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:26:19,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 20:26:19,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 20:26:19,963 INFO L87 Difference]: Start difference. First operand 964 states and 1220 transitions. Second operand 10 states. [2020-08-21 20:26:20,523 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-21 20:26:21,076 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:26:23,068 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:26:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:26:24,821 INFO L93 Difference]: Finished difference Result 1865 states and 2457 transitions. [2020-08-21 20:26:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 20:26:24,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-08-21 20:26:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:26:24,831 INFO L225 Difference]: With dead ends: 1865 [2020-08-21 20:26:24,831 INFO L226 Difference]: Without dead ends: 1168 [2020-08-21 20:26:24,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-21 20:26:24,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2020-08-21 20:26:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1071. [2020-08-21 20:26:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2020-08-21 20:26:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1331 transitions. [2020-08-21 20:26:25,041 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1331 transitions. Word has length 88 [2020-08-21 20:26:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:26:25,043 INFO L479 AbstractCegarLoop]: Abstraction has 1071 states and 1331 transitions. [2020-08-21 20:26:25,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 20:26:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1331 transitions. [2020-08-21 20:26:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-21 20:26:25,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:25,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:26:25,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:26:25,054 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:25,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:25,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1977854615, now seen corresponding path program 1 times [2020-08-21 20:26:25,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:25,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079871953] [2020-08-21 20:26:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:26:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,338 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:26:25,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:26:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:26:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:26:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:26:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:26:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 20:26:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:26:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:26:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 20:26:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 20:26:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 20:26:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 20:26:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-21 20:26:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-21 20:26:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 20:26:25,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079871953] [2020-08-21 20:26:25,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:26:25,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 20:26:25,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515968176] [2020-08-21 20:26:25,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 20:26:25,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:26:25,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 20:26:25,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 20:26:25,594 INFO L87 Difference]: Start difference. First operand 1071 states and 1331 transitions. Second operand 10 states. [2020-08-21 20:26:26,614 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:26,857 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 20:26:27,100 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:27,342 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:28,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:26:28,234 INFO L93 Difference]: Finished difference Result 2259 states and 2935 transitions. [2020-08-21 20:26:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:26:28,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 130 [2020-08-21 20:26:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:26:28,243 INFO L225 Difference]: With dead ends: 2259 [2020-08-21 20:26:28,243 INFO L226 Difference]: Without dead ends: 1212 [2020-08-21 20:26:28,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 20:26:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2020-08-21 20:26:28,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1101. [2020-08-21 20:26:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1101 states. [2020-08-21 20:26:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1365 transitions. [2020-08-21 20:26:28,415 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1365 transitions. Word has length 130 [2020-08-21 20:26:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:26:28,415 INFO L479 AbstractCegarLoop]: Abstraction has 1101 states and 1365 transitions. [2020-08-21 20:26:28,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 20:26:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1365 transitions. [2020-08-21 20:26:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-21 20:26:28,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:28,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:26:28,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 20:26:28,419 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:28,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:28,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1002064467, now seen corresponding path program 1 times [2020-08-21 20:26:28,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:28,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105575079] [2020-08-21 20:26:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:26:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,683 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:26:28,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:26:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:26:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:26:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:26:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:26:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 20:26:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:26:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:26:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 20:26:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 20:26:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 20:26:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-21 20:26:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 20:26:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 20:26:28,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105575079] [2020-08-21 20:26:28,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:26:28,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 20:26:28,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876581196] [2020-08-21 20:26:28,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 20:26:28,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:26:28,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 20:26:28,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:26:28,973 INFO L87 Difference]: Start difference. First operand 1101 states and 1365 transitions. Second operand 12 states. [2020-08-21 20:26:29,879 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:30,189 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:30,399 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:31,023 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:31,271 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:31,503 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:26:32,525 INFO L93 Difference]: Finished difference Result 2069 states and 2643 transitions. [2020-08-21 20:26:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 20:26:32,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-21 20:26:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:26:32,535 INFO L225 Difference]: With dead ends: 2069 [2020-08-21 20:26:32,535 INFO L226 Difference]: Without dead ends: 992 [2020-08-21 20:26:32,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 20:26:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2020-08-21 20:26:32,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 936. [2020-08-21 20:26:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2020-08-21 20:26:32,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1136 transitions. [2020-08-21 20:26:32,747 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1136 transitions. Word has length 126 [2020-08-21 20:26:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:26:32,749 INFO L479 AbstractCegarLoop]: Abstraction has 936 states and 1136 transitions. [2020-08-21 20:26:32,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 20:26:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1136 transitions. [2020-08-21 20:26:32,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-21 20:26:32,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:32,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:26:32,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 20:26:32,758 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:32,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:32,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1767310158, now seen corresponding path program 1 times [2020-08-21 20:26:32,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:32,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437119388] [2020-08-21 20:26:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:26:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,010 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:26:33,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:26:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:26:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:26:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:26:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:26:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 20:26:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 20:26:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:26:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:26:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 20:26:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 20:26:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 20:26:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-21 20:26:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-21 20:26:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 20:26:33,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437119388] [2020-08-21 20:26:33,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:26:33,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 20:26:33,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147035565] [2020-08-21 20:26:33,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 20:26:33,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:26:33,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 20:26:33,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 20:26:33,205 INFO L87 Difference]: Start difference. First operand 936 states and 1136 transitions. Second operand 13 states. [2020-08-21 20:26:33,760 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:26:34,475 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:36,463 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:36,763 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:37,008 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:37,243 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 20:26:37,499 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:37,753 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 20:26:37,995 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:38,241 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 20:26:38,504 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 20:26:38,746 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 20:26:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:26:39,467 INFO L93 Difference]: Finished difference Result 2701 states and 3404 transitions. [2020-08-21 20:26:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 20:26:39,468 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 130 [2020-08-21 20:26:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:26:39,479 INFO L225 Difference]: With dead ends: 2701 [2020-08-21 20:26:39,479 INFO L226 Difference]: Without dead ends: 1789 [2020-08-21 20:26:39,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 20:26:39,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2020-08-21 20:26:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1687. [2020-08-21 20:26:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1687 states. [2020-08-21 20:26:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2019 transitions. [2020-08-21 20:26:39,855 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2019 transitions. Word has length 130 [2020-08-21 20:26:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:26:39,857 INFO L479 AbstractCegarLoop]: Abstraction has 1687 states and 2019 transitions. [2020-08-21 20:26:39,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 20:26:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2019 transitions. [2020-08-21 20:26:39,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-21 20:26:39,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:39,862 INFO L422 BasicCegarLoop]: trace histogram [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 20:26:39,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 20:26:39,863 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:39,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:39,863 INFO L82 PathProgramCache]: Analyzing trace with hash 941448042, now seen corresponding path program 1 times [2020-08-21 20:26:39,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:39,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219052316] [2020-08-21 20:26:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:26:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,137 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:26:40,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:26:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:26:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:26:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:26:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:26:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 20:26:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 20:26:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:26:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:26:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:26:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 20:26:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 20:26:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 20:26:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-21 20:26:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-21 20:26:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 20:26:40,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219052316] [2020-08-21 20:26:40,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:26:40,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 20:26:40,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364175636] [2020-08-21 20:26:40,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 20:26:40,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:26:40,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 20:26:40,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:26:40,305 INFO L87 Difference]: Start difference. First operand 1687 states and 2019 transitions. Second operand 11 states. [2020-08-21 20:26:40,794 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:26:42,776 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:43,020 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:26:43,295 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:43,596 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:43,853 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:26:44,500 INFO L93 Difference]: Finished difference Result 1997 states and 2554 transitions. [2020-08-21 20:26:44,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 20:26:44,500 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 134 [2020-08-21 20:26:44,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:26:44,513 INFO L225 Difference]: With dead ends: 1997 [2020-08-21 20:26:44,513 INFO L226 Difference]: Without dead ends: 1994 [2020-08-21 20:26:44,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-08-21 20:26:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2020-08-21 20:26:44,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1687. [2020-08-21 20:26:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1687 states. [2020-08-21 20:26:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2009 transitions. [2020-08-21 20:26:44,848 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2009 transitions. Word has length 134 [2020-08-21 20:26:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:26:44,849 INFO L479 AbstractCegarLoop]: Abstraction has 1687 states and 2009 transitions. [2020-08-21 20:26:44,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 20:26:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2009 transitions. [2020-08-21 20:26:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-21 20:26:44,853 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:44,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:26:44,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 20:26:44,854 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:44,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:44,854 INFO L82 PathProgramCache]: Analyzing trace with hash 108116472, now seen corresponding path program 1 times [2020-08-21 20:26:44,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:44,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606446283] [2020-08-21 20:26:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:26:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,134 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:26:45,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:26:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:26:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:26:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:26:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:26:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 20:26:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 20:26:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:26:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:26:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 20:26:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 20:26:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:26:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 20:26:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:26:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-21 20:26:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-21 20:26:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:26:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:26:45,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606446283] [2020-08-21 20:26:45,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:26:45,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 20:26:45,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415183486] [2020-08-21 20:26:45,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 20:26:45,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:26:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 20:26:45,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:26:45,291 INFO L87 Difference]: Start difference. First operand 1687 states and 2009 transitions. Second operand 12 states. [2020-08-21 20:26:45,843 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:26:46,676 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 20:26:46,960 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 20:26:47,225 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 20:26:47,481 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:26:47,726 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:26:48,071 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:48,839 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:26:49,129 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 20:26:49,391 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 20:26:51,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:26:51,607 INFO L93 Difference]: Finished difference Result 4159 states and 5274 transitions. [2020-08-21 20:26:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 20:26:51,608 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 134 [2020-08-21 20:26:51,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:26:51,623 INFO L225 Difference]: With dead ends: 4159 [2020-08-21 20:26:51,623 INFO L226 Difference]: Without dead ends: 2806 [2020-08-21 20:26:51,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2020-08-21 20:26:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2020-08-21 20:26:52,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2479. [2020-08-21 20:26:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2479 states. [2020-08-21 20:26:52,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 3004 transitions. [2020-08-21 20:26:52,079 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 3004 transitions. Word has length 134 [2020-08-21 20:26:52,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:26:52,081 INFO L479 AbstractCegarLoop]: Abstraction has 2479 states and 3004 transitions. [2020-08-21 20:26:52,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 20:26:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 3004 transitions. [2020-08-21 20:26:52,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-21 20:26:52,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:52,092 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:52,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 20:26:52,092 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:52,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:52,093 INFO L82 PathProgramCache]: Analyzing trace with hash -116138867, now seen corresponding path program 2 times [2020-08-21 20:26:52,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:52,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10368949] [2020-08-21 20:26:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:26:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 20:26:52,164 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 20:26:52,164 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 20:26:52,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 20:26:52,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:26:52 BoogieIcfgContainer [2020-08-21 20:26:52,218 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:26:52,220 INFO L168 Benchmark]: Toolchain (without parser) took 53474.85 ms. Allocated memory was 140.0 MB in the beginning and 822.6 MB in the end (delta: 682.6 MB). Free memory was 102.8 MB in the beginning and 259.9 MB in the end (delta: -157.1 MB). Peak memory consumption was 525.5 MB. Max. memory is 7.1 GB. [2020-08-21 20:26:52,221 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 20:26:52,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 684.26 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 102.6 MB in the beginning and 173.9 MB in the end (delta: -71.3 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. [2020-08-21 20:26:52,223 INFO L168 Benchmark]: Boogie Preprocessor took 87.19 ms. Allocated memory is still 204.5 MB. Free memory was 173.9 MB in the beginning and 169.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-21 20:26:52,226 INFO L168 Benchmark]: RCFGBuilder took 1193.67 ms. Allocated memory was 204.5 MB in the beginning and 235.4 MB in the end (delta: 30.9 MB). Free memory was 169.7 MB in the beginning and 196.1 MB in the end (delta: -26.4 MB). Peak memory consumption was 83.7 MB. Max. memory is 7.1 GB. [2020-08-21 20:26:52,229 INFO L168 Benchmark]: TraceAbstraction took 51504.70 ms. Allocated memory was 235.4 MB in the beginning and 822.6 MB in the end (delta: 587.2 MB). Free memory was 196.1 MB in the beginning and 259.9 MB in the end (delta: -63.8 MB). Peak memory consumption was 523.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:26:52,232 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 684.26 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 102.6 MB in the beginning and 173.9 MB in the end (delta: -71.3 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 87.19 ms. Allocated memory is still 204.5 MB. Free memory was 173.9 MB in the beginning and 169.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1193.67 ms. Allocated memory was 204.5 MB in the beginning and 235.4 MB in the end (delta: 30.9 MB). Free memory was 169.7 MB in the beginning and 196.1 MB in the end (delta: -26.4 MB). Peak memory consumption was 83.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 51504.70 ms. Allocated memory was 235.4 MB in the beginning and 822.6 MB in the end (delta: 587.2 MB). Free memory was 196.1 MB in the beginning and 259.9 MB in the end (delta: -63.8 MB). Peak memory consumption was 523.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L247] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L524] int pumpRunning = 0; [L525] int systemActive = 1; [L728] int waterLevel = 1; [L729] int methaneLevelCritical = 0; [L822] int cleanupTimeShifts = 4; [L895] int retValue_acc ; [L896] int tmp ; [L900] FCALL select_helpers() [L901] FCALL select_features() [L902] CALL, EXPR valid_product() [L69] int retValue_acc ; [L72] retValue_acc = 1 [L73] return (retValue_acc); [L902] RET, EXPR valid_product() [L902] tmp = valid_product() [L904] COND TRUE \read(tmp) [L906] FCALL setup() [L907] CALL runTest() [L889] CALL test() [L450] int splverifierCounter ; [L451] int tmp ; [L452] int tmp___0 ; [L453] int tmp___1 ; [L454] int tmp___2 ; [L457] splverifierCounter = 0 [L459] COND TRUE 1 [L461] COND TRUE splverifierCounter < 4 [L467] tmp = __VERIFIER_nondet_int() [L469] COND TRUE \read(tmp) [L471] CALL waterRise() [L746] COND TRUE waterLevel < 2 [L747] waterLevel = waterLevel + 1 [L471] RET waterRise() [L477] tmp___0 = __VERIFIER_nondet_int() [L479] COND FALSE !(\read(tmp___0)) [L487] tmp___2 = __VERIFIER_nondet_int() [L489] COND TRUE \read(tmp___2) [L504] CALL timeShift() [L532] COND FALSE !(\read(pumpRunning)) [L539] COND TRUE \read(systemActive) [L541] CALL processEnvironment() [L587] int tmp ; [L590] COND FALSE !(\read(pumpRunning)) [L605] CALL processEnvironment__wrappee__highWaterSensor() [L561] int tmp ; [L564] COND TRUE ! pumpRunning [L566] CALL, EXPR isHighWaterLevel() [L684] int retValue_acc ; [L685] int tmp ; [L686] int tmp___0 ; [L690] CALL, EXPR isHighWaterSensorDry() [L808] int retValue_acc ; [L811] COND FALSE !(waterLevel < 2) [L815] retValue_acc = 0 [L816] return (retValue_acc); [L690] RET, EXPR isHighWaterSensorDry() [L690] tmp = isHighWaterSensorDry() [L692] COND FALSE !(\read(tmp)) [L695] tmp___0 = 1 [L697] retValue_acc = tmp___0 [L698] return (retValue_acc); [L566] RET, EXPR isHighWaterLevel() [L566] tmp = isHighWaterLevel() [L568] COND TRUE \read(tmp) [L570] CALL activatePump() [L615] pumpRunning = 1 [L570] RET activatePump() [L605] RET processEnvironment__wrappee__highWaterSensor() [L541] RET processEnvironment() [L547] CALL __utac_acc__Specification4_spec__1() [L919] int tmp ; [L920] int tmp___0 ; [L924] CALL, EXPR getWaterLevel() [L799] int retValue_acc ; [L802] retValue_acc = waterLevel [L803] return (retValue_acc); [L924] RET, EXPR getWaterLevel() [L924] tmp = getWaterLevel() [L926] COND FALSE !(tmp == 0) [L547] RET __utac_acc__Specification4_spec__1() [L504] RET timeShift() [L459] COND TRUE 1 [L461] COND TRUE splverifierCounter < 4 [L467] tmp = __VERIFIER_nondet_int() [L469] COND FALSE !(\read(tmp)) [L477] tmp___0 = __VERIFIER_nondet_int() [L479] COND FALSE !(\read(tmp___0)) [L487] tmp___2 = __VERIFIER_nondet_int() [L489] COND TRUE \read(tmp___2) [L504] CALL timeShift() [L532] COND TRUE \read(pumpRunning) [L534] CALL lowerWaterLevel() [L734] COND TRUE waterLevel > 0 [L735] waterLevel = waterLevel - 1 [L534] RET lowerWaterLevel() [L539] COND TRUE \read(systemActive) [L541] CALL processEnvironment() [L587] int tmp ; [L590] COND TRUE \read(pumpRunning) [L592] CALL, EXPR isMethaneAlarm() [L628] int retValue_acc ; [L632] CALL, EXPR isMethaneLevelCritical() [L767] int retValue_acc ; [L770] retValue_acc = methaneLevelCritical [L771] return (retValue_acc); [L632] RET, EXPR isMethaneLevelCritical() [L632] retValue_acc = isMethaneLevelCritical() [L634] return (retValue_acc); [L592] RET, EXPR isMethaneAlarm() [L592] tmp = isMethaneAlarm() [L594] COND FALSE !(\read(tmp)) [L600] CALL processEnvironment__wrappee__highWaterSensor() [L561] int tmp ; [L564] COND FALSE !(! pumpRunning) [L579] FCALL processEnvironment__wrappee__base() [L600] RET processEnvironment__wrappee__highWaterSensor() [L541] RET processEnvironment() [L547] CALL __utac_acc__Specification4_spec__1() [L919] int tmp ; [L920] int tmp___0 ; [L924] CALL, EXPR getWaterLevel() [L799] int retValue_acc ; [L802] retValue_acc = waterLevel [L803] return (retValue_acc); [L924] RET, EXPR getWaterLevel() [L924] tmp = getWaterLevel() [L926] COND FALSE !(tmp == 0) [L547] RET __utac_acc__Specification4_spec__1() [L504] RET timeShift() [L459] COND TRUE 1 [L461] COND TRUE splverifierCounter < 4 [L467] tmp = __VERIFIER_nondet_int() [L469] COND FALSE !(\read(tmp)) [L477] tmp___0 = __VERIFIER_nondet_int() [L479] COND FALSE !(\read(tmp___0)) [L487] tmp___2 = __VERIFIER_nondet_int() [L489] COND TRUE \read(tmp___2) [L504] CALL timeShift() [L532] COND TRUE \read(pumpRunning) [L534] CALL lowerWaterLevel() [L734] COND TRUE waterLevel > 0 [L735] waterLevel = waterLevel - 1 [L534] RET lowerWaterLevel() [L539] COND TRUE \read(systemActive) [L541] CALL processEnvironment() [L587] int tmp ; [L590] COND TRUE \read(pumpRunning) [L592] CALL, EXPR isMethaneAlarm() [L628] int retValue_acc ; [L632] CALL, EXPR isMethaneLevelCritical() [L767] int retValue_acc ; [L770] retValue_acc = methaneLevelCritical [L771] return (retValue_acc); [L632] RET, EXPR isMethaneLevelCritical() [L632] retValue_acc = isMethaneLevelCritical() [L634] return (retValue_acc); [L592] RET, EXPR isMethaneAlarm() [L592] tmp = isMethaneAlarm() [L594] COND FALSE !(\read(tmp)) [L600] CALL processEnvironment__wrappee__highWaterSensor() [L561] int tmp ; [L564] COND FALSE !(! pumpRunning) [L579] FCALL processEnvironment__wrappee__base() [L600] RET processEnvironment__wrappee__highWaterSensor() [L541] RET processEnvironment() [L547] CALL __utac_acc__Specification4_spec__1() [L919] int tmp ; [L920] int tmp___0 ; [L924] CALL, EXPR getWaterLevel() [L799] int retValue_acc ; [L802] retValue_acc = waterLevel [L803] return (retValue_acc); [L924] RET, EXPR getWaterLevel() [L924] tmp = getWaterLevel() [L926] COND TRUE tmp == 0 [L928] CALL, EXPR isPumpRunning() [L639] int retValue_acc ; [L642] retValue_acc = pumpRunning [L643] return (retValue_acc); [L928] RET, EXPR isPumpRunning() [L928] tmp___0 = isPumpRunning() [L930] COND TRUE \read(tmp___0) [L932] CALL __automaton_fail() [L722] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 39 procedures, 231 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 51.3s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 43.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1443 SDtfs, 3438 SDslu, 1749 SDs, 0 SdLazy, 10736 SolverSat, 2371 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 546 GetRequests, 355 SyntacticMatches, 7 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 18.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2479occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 1299 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1189 NumberOfCodeBlocks, 1189 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 993 ConstructedInterpolants, 0 QuantifiedInterpolants, 354814 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 128/147 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...