/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product48.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:22:28,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:22:28,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:22:28,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:22:28,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:22:28,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:22:28,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:22:28,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:22:28,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:22:28,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:22:28,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:22:28,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 19:22:28,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:22:28,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:22:28,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:22:28,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:22:28,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:22:28,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:22:28,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:22:28,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:22:28,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:22:28,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:22:28,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:22:28,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:22:28,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 19:22:28,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 19:22:28,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 19:22:28,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 19:22:28,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 19:22:28,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 19:22:28,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 19:22:28,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 19:22:28,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 19:22:28,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 19:22:28,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 19:22:28,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 19:22:28,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 19:22:28,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 19:22:28,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:22:28,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:22:28,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:22:28,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 19:22:28,538 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:22:28,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:22:28,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:22:28,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:22:28,541 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:22:28,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:22:28,542 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:22:28,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:22:28,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:22:28,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:22:28,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:22:28,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:22:28,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:22:28,545 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:22:28,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:22:28,545 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:22:28,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:22:28,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:22:28,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:22:28,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:22:28,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:22:28,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:22:28,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:22:28,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:22:28,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:22:28,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:22:28,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:22:28,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:22:28,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:22:28,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:22:28,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:22:28,860 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:22:28,864 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:22:28,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:22:28,866 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:22:28,866 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product48.cil.c [2020-08-18 19:22:28,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b5e46327/57f8a97c60ec44b0b3fa9c3999afd1b0/FLAG21c0807b2 [2020-08-18 19:22:29,469 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:22:29,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product48.cil.c [2020-08-18 19:22:29,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b5e46327/57f8a97c60ec44b0b3fa9c3999afd1b0/FLAG21c0807b2 [2020-08-18 19:22:29,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b5e46327/57f8a97c60ec44b0b3fa9c3999afd1b0 [2020-08-18 19:22:29,842 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:22:29,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:22:29,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:22:29,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:22:29,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:22:29,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:22:29" (1/1) ... [2020-08-18 19:22:29,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b134fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:29, skipping insertion in model container [2020-08-18 19:22:29,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:22:29" (1/1) ... [2020-08-18 19:22:29,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:22:29,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:22:30,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:22:30,338 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:22:30,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:22:30,541 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:22:30,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:30 WrapperNode [2020-08-18 19:22:30,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:22:30,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:22:30,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:22:30,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:22:30,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:30" (1/1) ... [2020-08-18 19:22:30,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:30" (1/1) ... [2020-08-18 19:22:30,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:30" (1/1) ... [2020-08-18 19:22:30,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:30" (1/1) ... [2020-08-18 19:22:30,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:30" (1/1) ... [2020-08-18 19:22:30,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:30" (1/1) ... [2020-08-18 19:22:30,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:30" (1/1) ... [2020-08-18 19:22:30,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:22:30,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:22:30,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:22:30,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:22:30,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:22:30,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:22:30,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:22:30,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 19:22:30,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-18 19:22:30,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 19:22:30,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 19:22:30,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 19:22:30,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 19:22:30,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 19:22:30,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 19:22:30,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 19:22:30,737 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 19:22:30,737 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 19:22:30,737 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 19:22:30,737 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 19:22:30,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:22:30,738 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 19:22:30,738 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 19:22:30,739 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2020-08-18 19:22:30,739 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 19:22:30,740 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-18 19:22:30,740 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 19:22:30,740 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 19:22:30,741 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 19:22:30,742 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 19:22:30,743 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 19:22:30,743 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 19:22:30,744 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 19:22:30,744 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 19:22:30,744 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 19:22:30,744 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 19:22:30,744 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 19:22:30,744 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 19:22:30,745 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 19:22:30,745 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 19:22:30,745 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 19:22:30,745 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 19:22:30,745 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 19:22:30,746 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 19:22:30,746 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 19:22:30,746 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 19:22:30,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:22:30,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 19:22:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 19:22:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 19:22:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 19:22:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 19:22:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-18 19:22:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 19:22:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 19:22:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 19:22:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 19:22:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 19:22:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 19:22:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 19:22:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 19:22:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 19:22:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 19:22:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 19:22:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 19:22:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 19:22:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 19:22:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 19:22:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 19:22:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 19:22:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 19:22:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 19:22:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 19:22:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 19:22:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 19:22:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 19:22:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 19:22:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 19:22:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 19:22:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 19:22:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 19:22:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 19:22:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:22:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 19:22:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 19:22:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 19:22:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 19:22:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 19:22:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 19:22:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 19:22:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 19:22:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 19:22:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 19:22:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 19:22:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2020-08-18 19:22:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 19:22:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-18 19:22:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 19:22:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:22:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 19:22:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:22:31,757 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:22:31,757 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 19:22:31,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:22:31 BoogieIcfgContainer [2020-08-18 19:22:31,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:22:31,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:22:31,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:22:31,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:22:31,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:22:29" (1/3) ... [2020-08-18 19:22:31,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4056e4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:22:31, skipping insertion in model container [2020-08-18 19:22:31,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:30" (2/3) ... [2020-08-18 19:22:31,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4056e4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:22:31, skipping insertion in model container [2020-08-18 19:22:31,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:22:31" (3/3) ... [2020-08-18 19:22:31,771 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product48.cil.c [2020-08-18 19:22:31,781 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:22:31,789 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:22:31,803 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:22:31,829 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:22:31,829 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:22:31,829 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:22:31,830 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:22:31,830 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:22:31,830 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:22:31,830 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:22:31,830 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:22:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2020-08-18 19:22:31,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 19:22:31,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:22:31,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:22:31,864 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:22:31,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:22:31,871 INFO L82 PathProgramCache]: Analyzing trace with hash 267821041, now seen corresponding path program 1 times [2020-08-18 19:22:31,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:22:31,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071698463] [2020-08-18 19:22:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:22:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:32,532 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:22:32,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:22:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:32,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:22:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:32,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:22:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:32,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:22:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:32,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:22:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:32,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 19:22:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:32,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 19:22:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:22:32,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071698463] [2020-08-18 19:22:32,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:22:32,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:22:32,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861811915] [2020-08-18 19:22:32,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:22:32,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:22:32,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:22:32,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:22:32,702 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 3 states. [2020-08-18 19:22:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:22:33,930 INFO L93 Difference]: Finished difference Result 332 states and 431 transitions. [2020-08-18 19:22:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:22:33,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 19:22:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:22:33,948 INFO L225 Difference]: With dead ends: 332 [2020-08-18 19:22:33,949 INFO L226 Difference]: Without dead ends: 180 [2020-08-18 19:22:33,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:22:33,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-18 19:22:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 143. [2020-08-18 19:22:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-18 19:22:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2020-08-18 19:22:34,059 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 46 [2020-08-18 19:22:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:22:34,060 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2020-08-18 19:22:34,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:22:34,060 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2020-08-18 19:22:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 19:22:34,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:22:34,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:22:34,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:22:34,071 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:22:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:22:34,072 INFO L82 PathProgramCache]: Analyzing trace with hash -395653053, now seen corresponding path program 1 times [2020-08-18 19:22:34,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:22:34,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804374973] [2020-08-18 19:22:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:22:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:34,482 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:22:34,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:22:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:34,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:22:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:34,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:22:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:34,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:22:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:34,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:22:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:34,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:22:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:34,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 19:22:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:22:34,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804374973] [2020-08-18 19:22:34,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:22:34,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 19:22:34,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841513025] [2020-08-18 19:22:34,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 19:22:34,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:22:34,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 19:22:34,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:22:34,561 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand 4 states. [2020-08-18 19:22:34,959 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:22:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:22:35,926 INFO L93 Difference]: Finished difference Result 255 states and 310 transitions. [2020-08-18 19:22:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 19:22:35,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 19:22:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:22:35,931 INFO L225 Difference]: With dead ends: 255 [2020-08-18 19:22:35,932 INFO L226 Difference]: Without dead ends: 164 [2020-08-18 19:22:35,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:22:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-08-18 19:22:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-08-18 19:22:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-18 19:22:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2020-08-18 19:22:35,977 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 47 [2020-08-18 19:22:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:22:35,978 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2020-08-18 19:22:35,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 19:22:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2020-08-18 19:22:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 19:22:35,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:22:35,980 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] [2020-08-18 19:22:35,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:22:35,980 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:22:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:22:35,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1814461049, now seen corresponding path program 1 times [2020-08-18 19:22:35,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:22:35,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398421910] [2020-08-18 19:22:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:22:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:36,290 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:22:36,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:22:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:36,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:22:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:36,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:22:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:36,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:22:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:36,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:22:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:36,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 19:22:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:36,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 19:22:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:22:36,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398421910] [2020-08-18 19:22:36,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:22:36,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 19:22:36,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003300552] [2020-08-18 19:22:36,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 19:22:36,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:22:36,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 19:22:36,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:22:36,380 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand 5 states. [2020-08-18 19:22:36,654 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:22:37,293 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:22:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:22:38,918 INFO L93 Difference]: Finished difference Result 459 states and 568 transitions. [2020-08-18 19:22:38,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 19:22:38,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-08-18 19:22:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:22:38,925 INFO L225 Difference]: With dead ends: 459 [2020-08-18 19:22:38,925 INFO L226 Difference]: Without dead ends: 349 [2020-08-18 19:22:38,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 19:22:38,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-18 19:22:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 282. [2020-08-18 19:22:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-08-18 19:22:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 340 transitions. [2020-08-18 19:22:39,007 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 340 transitions. Word has length 52 [2020-08-18 19:22:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:22:39,008 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 340 transitions. [2020-08-18 19:22:39,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 19:22:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 340 transitions. [2020-08-18 19:22:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 19:22:39,009 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:22:39,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:22:39,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:22:39,010 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:22:39,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:22:39,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1060505325, now seen corresponding path program 1 times [2020-08-18 19:22:39,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:22:39,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162783451] [2020-08-18 19:22:39,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:22:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:39,329 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:22:39,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:22:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:39,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:22:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:39,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:22:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:39,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:22:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:39,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:22:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:39,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:22:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:39,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 19:22:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:39,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 19:22:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:22:39,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162783451] [2020-08-18 19:22:39,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:22:39,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 19:22:39,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097501005] [2020-08-18 19:22:39,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 19:22:39,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:22:39,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 19:22:39,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:22:39,472 INFO L87 Difference]: Start difference. First operand 282 states and 340 transitions. Second operand 12 states. [2020-08-18 19:22:39,895 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:22:40,200 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:22:40,452 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:22:40,689 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:22:41,264 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:22:42,012 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:22:42,386 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 19:22:42,705 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 19:22:42,980 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:22:43,299 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:22:43,708 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 19:22:44,029 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 19:22:44,278 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:22:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:22:46,382 INFO L93 Difference]: Finished difference Result 1153 states and 1576 transitions. [2020-08-18 19:22:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 19:22:46,383 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-18 19:22:46,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:22:46,392 INFO L225 Difference]: With dead ends: 1153 [2020-08-18 19:22:46,392 INFO L226 Difference]: Without dead ends: 895 [2020-08-18 19:22:46,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-18 19:22:46,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2020-08-18 19:22:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 794. [2020-08-18 19:22:46,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-08-18 19:22:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1006 transitions. [2020-08-18 19:22:46,576 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1006 transitions. Word has length 57 [2020-08-18 19:22:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:22:46,577 INFO L479 AbstractCegarLoop]: Abstraction has 794 states and 1006 transitions. [2020-08-18 19:22:46,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 19:22:46,578 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1006 transitions. [2020-08-18 19:22:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 19:22:46,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:22:46,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:22:46,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 19:22:46,581 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:22:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:22:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1254258393, now seen corresponding path program 1 times [2020-08-18 19:22:46,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:22:46,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550042808] [2020-08-18 19:22:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:22:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:46,841 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:22:46,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:22:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:46,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:22:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:46,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:22:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:46,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:22:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:46,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:22:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:46,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:22:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:46,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 19:22:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:46,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 19:22:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:46,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 19:22:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:22:46,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550042808] [2020-08-18 19:22:46,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:22:46,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 19:22:46,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278582783] [2020-08-18 19:22:46,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 19:22:46,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:22:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 19:22:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 19:22:46,935 INFO L87 Difference]: Start difference. First operand 794 states and 1006 transitions. Second operand 6 states. [2020-08-18 19:22:47,279 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:22:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:22:49,333 INFO L93 Difference]: Finished difference Result 1951 states and 2621 transitions. [2020-08-18 19:22:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 19:22:49,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-18 19:22:49,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:22:49,342 INFO L225 Difference]: With dead ends: 1951 [2020-08-18 19:22:49,342 INFO L226 Difference]: Without dead ends: 1181 [2020-08-18 19:22:49,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-18 19:22:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2020-08-18 19:22:49,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1090. [2020-08-18 19:22:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1090 states. [2020-08-18 19:22:49,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1352 transitions. [2020-08-18 19:22:49,566 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1352 transitions. Word has length 61 [2020-08-18 19:22:49,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:22:49,566 INFO L479 AbstractCegarLoop]: Abstraction has 1090 states and 1352 transitions. [2020-08-18 19:22:49,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 19:22:49,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1352 transitions. [2020-08-18 19:22:49,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 19:22:49,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:22:49,569 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] [2020-08-18 19:22:49,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 19:22:49,570 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:22:49,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:22:49,570 INFO L82 PathProgramCache]: Analyzing trace with hash 909865268, now seen corresponding path program 1 times [2020-08-18 19:22:49,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:22:49,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369276531] [2020-08-18 19:22:49,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:22:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:49,898 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:22:49,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:22:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:49,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:22:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:49,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:22:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:49,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:22:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:49,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:22:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:49,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 19:22:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 19:22:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 19:22:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:22:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:22:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 19:22:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 19:22:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 19:22:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 19:22:50,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369276531] [2020-08-18 19:22:50,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:22:50,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 19:22:50,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837165237] [2020-08-18 19:22:50,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 19:22:50,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:22:50,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 19:22:50,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 19:22:50,083 INFO L87 Difference]: Start difference. First operand 1090 states and 1352 transitions. Second operand 10 states. [2020-08-18 19:22:50,719 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-18 19:22:51,331 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:22:53,592 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:22:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:22:55,677 INFO L93 Difference]: Finished difference Result 2091 states and 2705 transitions. [2020-08-18 19:22:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 19:22:55,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-18 19:22:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:22:55,687 INFO L225 Difference]: With dead ends: 2091 [2020-08-18 19:22:55,687 INFO L226 Difference]: Without dead ends: 1310 [2020-08-18 19:22:55,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-18 19:22:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2020-08-18 19:22:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1197. [2020-08-18 19:22:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-08-18 19:22:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1463 transitions. [2020-08-18 19:22:55,943 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1463 transitions. Word has length 89 [2020-08-18 19:22:55,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:22:55,945 INFO L479 AbstractCegarLoop]: Abstraction has 1197 states and 1463 transitions. [2020-08-18 19:22:55,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 19:22:55,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1463 transitions. [2020-08-18 19:22:55,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 19:22:55,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:22:55,951 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, 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] [2020-08-18 19:22:55,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 19:22:55,951 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:22:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:22:55,952 INFO L82 PathProgramCache]: Analyzing trace with hash -920784732, now seen corresponding path program 1 times [2020-08-18 19:22:55,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:22:55,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053628603] [2020-08-18 19:22:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:22:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,231 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:22:56,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:22:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:22:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:22:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:22:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:22:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:22:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:22:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:22:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:22:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:22:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:22:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:22:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:22:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:22:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 19:22:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:22:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-18 19:22:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 19:22:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:22:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:22:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 19:22:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 19:22:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-18 19:22:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 19:22:56,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053628603] [2020-08-18 19:22:56,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:22:56,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 19:22:56,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550027210] [2020-08-18 19:22:56,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 19:22:56,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:22:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 19:22:56,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 19:22:56,419 INFO L87 Difference]: Start difference. First operand 1197 states and 1463 transitions. Second operand 10 states. [2020-08-18 19:22:57,463 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:22:57,903 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:22:58,263 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:22:58,490 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:22:59,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:22:59,826 INFO L93 Difference]: Finished difference Result 2526 states and 3300 transitions. [2020-08-18 19:22:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 19:22:59,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 143 [2020-08-18 19:22:59,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:22:59,835 INFO L225 Difference]: With dead ends: 2526 [2020-08-18 19:22:59,836 INFO L226 Difference]: Without dead ends: 1353 [2020-08-18 19:22:59,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 19:22:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2020-08-18 19:23:00,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1227. [2020-08-18 19:23:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2020-08-18 19:23:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1497 transitions. [2020-08-18 19:23:00,173 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1497 transitions. Word has length 143 [2020-08-18 19:23:00,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:23:00,173 INFO L479 AbstractCegarLoop]: Abstraction has 1227 states and 1497 transitions. [2020-08-18 19:23:00,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 19:23:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1497 transitions. [2020-08-18 19:23:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 19:23:00,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:23:00,179 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, 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] [2020-08-18 19:23:00,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 19:23:00,179 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:23:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:23:00,181 INFO L82 PathProgramCache]: Analyzing trace with hash -127940416, now seen corresponding path program 1 times [2020-08-18 19:23:00,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:23:00,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463369086] [2020-08-18 19:23:00,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:23:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,475 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:23:00,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:23:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:23:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:23:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:23:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:23:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:23:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 19:23:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 19:23:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-18 19:23:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 19:23:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 19:23:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 19:23:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 19:23:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 19:23:00,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463369086] [2020-08-18 19:23:00,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:23:00,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 19:23:00,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989669609] [2020-08-18 19:23:00,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 19:23:00,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:23:00,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 19:23:00,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:23:00,719 INFO L87 Difference]: Start difference. First operand 1227 states and 1497 transitions. Second operand 12 states. [2020-08-18 19:23:01,205 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:01,446 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:01,672 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:02,403 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:02,704 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:02,926 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:04,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:23:04,049 INFO L93 Difference]: Finished difference Result 2251 states and 2835 transitions. [2020-08-18 19:23:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 19:23:04,049 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 147 [2020-08-18 19:23:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:23:04,057 INFO L225 Difference]: With dead ends: 2251 [2020-08-18 19:23:04,057 INFO L226 Difference]: Without dead ends: 1048 [2020-08-18 19:23:04,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 19:23:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2020-08-18 19:23:04,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 990. [2020-08-18 19:23:04,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2020-08-18 19:23:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1192 transitions. [2020-08-18 19:23:04,249 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1192 transitions. Word has length 147 [2020-08-18 19:23:04,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:23:04,253 INFO L479 AbstractCegarLoop]: Abstraction has 990 states and 1192 transitions. [2020-08-18 19:23:04,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 19:23:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1192 transitions. [2020-08-18 19:23:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 19:23:04,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:23:04,259 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, 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] [2020-08-18 19:23:04,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 19:23:04,259 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:23:04,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:23:04,260 INFO L82 PathProgramCache]: Analyzing trace with hash -401491891, now seen corresponding path program 1 times [2020-08-18 19:23:04,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:23:04,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604114747] [2020-08-18 19:23:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:23:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,592 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:23:04,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:23:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:23:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:23:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:23:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 19:23:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 19:23:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:23:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 19:23:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-18 19:23:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:04,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 19:23:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 19:23:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 19:23:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 19:23:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-18 19:23:05,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604114747] [2020-08-18 19:23:05,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:23:05,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 19:23:05,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541213755] [2020-08-18 19:23:05,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 19:23:05,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:23:05,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 19:23:05,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-08-18 19:23:05,085 INFO L87 Difference]: Start difference. First operand 990 states and 1192 transitions. Second operand 15 states. [2020-08-18 19:23:05,793 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:06,609 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:08,106 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:08,460 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:08,715 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:08,949 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:09,230 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:09,470 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:09,982 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 189 [2020-08-18 19:23:10,464 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 189 [2020-08-18 19:23:11,277 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:11,512 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:11,769 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:12,011 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:23:12,851 INFO L93 Difference]: Finished difference Result 2788 states and 3494 transitions. [2020-08-18 19:23:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 19:23:12,854 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2020-08-18 19:23:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:23:12,865 INFO L225 Difference]: With dead ends: 2788 [2020-08-18 19:23:12,866 INFO L226 Difference]: Without dead ends: 1822 [2020-08-18 19:23:12,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 19:23:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2020-08-18 19:23:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1717. [2020-08-18 19:23:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1717 states. [2020-08-18 19:23:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2029 transitions. [2020-08-18 19:23:13,193 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2029 transitions. Word has length 147 [2020-08-18 19:23:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:23:13,195 INFO L479 AbstractCegarLoop]: Abstraction has 1717 states and 2029 transitions. [2020-08-18 19:23:13,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 19:23:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2029 transitions. [2020-08-18 19:23:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 19:23:13,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:23:13,200 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:23:13,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 19:23:13,201 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:23:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:23:13,201 INFO L82 PathProgramCache]: Analyzing trace with hash 628739049, now seen corresponding path program 1 times [2020-08-18 19:23:13,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:23:13,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483901355] [2020-08-18 19:23:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:23:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,509 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:23:13,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:23:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:23:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:23:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:23:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 19:23:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 19:23:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:23:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 19:23:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 19:23:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 19:23:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-18 19:23:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 19:23:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 19:23:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-18 19:23:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-18 19:23:13,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483901355] [2020-08-18 19:23:13,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:23:13,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 19:23:13,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024600128] [2020-08-18 19:23:13,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 19:23:13,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:23:13,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 19:23:13,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 19:23:13,788 INFO L87 Difference]: Start difference. First operand 1717 states and 2029 transitions. Second operand 11 states. [2020-08-18 19:23:14,229 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:16,248 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:16,489 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:16,795 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:17,042 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:17,281 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:17,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:23:17,860 INFO L93 Difference]: Finished difference Result 2048 states and 2598 transitions. [2020-08-18 19:23:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 19:23:17,861 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 151 [2020-08-18 19:23:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:23:17,874 INFO L225 Difference]: With dead ends: 2048 [2020-08-18 19:23:17,874 INFO L226 Difference]: Without dead ends: 2045 [2020-08-18 19:23:17,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-08-18 19:23:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2020-08-18 19:23:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1717. [2020-08-18 19:23:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1717 states. [2020-08-18 19:23:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2019 transitions. [2020-08-18 19:23:18,222 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2019 transitions. Word has length 151 [2020-08-18 19:23:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:23:18,223 INFO L479 AbstractCegarLoop]: Abstraction has 1717 states and 2019 transitions. [2020-08-18 19:23:18,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 19:23:18,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2019 transitions. [2020-08-18 19:23:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 19:23:18,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:23:18,227 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, 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] [2020-08-18 19:23:18,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 19:23:18,228 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:23:18,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:23:18,228 INFO L82 PathProgramCache]: Analyzing trace with hash -220870584, now seen corresponding path program 1 times [2020-08-18 19:23:18,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:23:18,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994379327] [2020-08-18 19:23:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:23:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,536 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:23:18,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:23:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:23:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:23:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:23:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 19:23:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 19:23:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:23:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 19:23:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-18 19:23:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 19:23:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 19:23:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 19:23:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-18 19:23:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 19:23:18,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994379327] [2020-08-18 19:23:18,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:23:18,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 19:23:18,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350542523] [2020-08-18 19:23:18,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 19:23:18,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:23:18,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 19:23:18,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:23:18,728 INFO L87 Difference]: Start difference. First operand 1717 states and 2019 transitions. Second operand 12 states. [2020-08-18 19:23:19,140 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:19,799 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:20,302 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:20,568 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:20,813 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:21,068 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:21,348 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:21,595 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:23,479 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:23:24,180 INFO L93 Difference]: Finished difference Result 4124 states and 5229 transitions. [2020-08-18 19:23:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 19:23:24,181 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 151 [2020-08-18 19:23:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:23:24,196 INFO L225 Difference]: With dead ends: 4124 [2020-08-18 19:23:24,197 INFO L226 Difference]: Without dead ends: 2749 [2020-08-18 19:23:24,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-08-18 19:23:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2020-08-18 19:23:24,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2293. [2020-08-18 19:23:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2293 states. [2020-08-18 19:23:24,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 2743 transitions. [2020-08-18 19:23:24,575 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 2743 transitions. Word has length 151 [2020-08-18 19:23:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:23:24,576 INFO L479 AbstractCegarLoop]: Abstraction has 2293 states and 2743 transitions. [2020-08-18 19:23:24,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 19:23:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 2743 transitions. [2020-08-18 19:23:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-08-18 19:23:24,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:23:24,584 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:23:24,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 19:23:24,584 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:23:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:23:24,585 INFO L82 PathProgramCache]: Analyzing trace with hash 402231489, now seen corresponding path program 2 times [2020-08-18 19:23:24,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:23:24,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026829042] [2020-08-18 19:23:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:23:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 19:23:24,646 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 19:23:24,646 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 19:23:24,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 19:23:24,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:23:24 BoogieIcfgContainer [2020-08-18 19:23:24,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:23:24,688 INFO L168 Benchmark]: Toolchain (without parser) took 54844.21 ms. Allocated memory was 137.9 MB in the beginning and 1.1 GB in the end (delta: 960.5 MB). Free memory was 99.4 MB in the beginning and 282.2 MB in the end (delta: -182.8 MB). Peak memory consumption was 777.7 MB. Max. memory is 7.1 GB. [2020-08-18 19:23:24,689 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 19:23:24,690 INFO L168 Benchmark]: CACSL2BoogieTranslator took 694.38 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 99.2 MB in the beginning and 167.2 MB in the end (delta: -68.0 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-08-18 19:23:24,690 INFO L168 Benchmark]: Boogie Preprocessor took 100.33 ms. Allocated memory is still 200.8 MB. Free memory was 167.2 MB in the beginning and 162.4 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. [2020-08-18 19:23:24,691 INFO L168 Benchmark]: RCFGBuilder took 1119.53 ms. Allocated memory was 200.8 MB in the beginning and 230.7 MB in the end (delta: 29.9 MB). Free memory was 162.4 MB in the beginning and 191.2 MB in the end (delta: -28.9 MB). Peak memory consumption was 84.8 MB. Max. memory is 7.1 GB. [2020-08-18 19:23:24,692 INFO L168 Benchmark]: TraceAbstraction took 52922.40 ms. Allocated memory was 230.7 MB in the beginning and 1.1 GB in the end (delta: 867.7 MB). Free memory was 189.8 MB in the beginning and 282.2 MB in the end (delta: -92.4 MB). Peak memory consumption was 775.3 MB. Max. memory is 7.1 GB. [2020-08-18 19:23:24,695 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 694.38 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 99.2 MB in the beginning and 167.2 MB in the end (delta: -68.0 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 100.33 ms. Allocated memory is still 200.8 MB. Free memory was 167.2 MB in the beginning and 162.4 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1119.53 ms. Allocated memory was 200.8 MB in the beginning and 230.7 MB in the end (delta: 29.9 MB). Free memory was 162.4 MB in the beginning and 191.2 MB in the end (delta: -28.9 MB). Peak memory consumption was 84.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 52922.40 ms. Allocated memory was 230.7 MB in the beginning and 1.1 GB in the end (delta: 867.7 MB). Free memory was 189.8 MB in the beginning and 282.2 MB in the end (delta: -92.4 MB). Peak memory consumption was 775.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 439]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L238] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L444] int cleanupTimeShifts = 4; [L556] int pumpRunning = 0; [L557] int systemActive = 1; [L774] int waterLevel = 1; [L775] int methaneLevelCritical = 0; [L525] int retValue_acc ; [L526] int tmp ; [L530] FCALL select_helpers() [L531] FCALL select_features() [L532] CALL, EXPR valid_product() [L963] int retValue_acc ; [L966] retValue_acc = 1 [L967] return (retValue_acc); [L532] RET, EXPR valid_product() [L532] tmp = valid_product() [L534] COND TRUE \read(tmp) [L536] FCALL setup() [L537] CALL runTest() [L516] CALL test() [L869] int splverifierCounter ; [L870] int tmp ; [L871] int tmp___0 ; [L872] int tmp___1 ; [L873] int tmp___2 ; [L876] splverifierCounter = 0 [L878] COND TRUE 1 [L880] COND TRUE splverifierCounter < 4 [L886] tmp = __VERIFIER_nondet_int() [L888] COND TRUE \read(tmp) [L890] CALL waterRise() [L792] COND TRUE waterLevel < 2 [L793] waterLevel = waterLevel + 1 [L890] RET waterRise() [L896] tmp___0 = __VERIFIER_nondet_int() [L898] COND FALSE !(\read(tmp___0)) [L906] tmp___2 = __VERIFIER_nondet_int() [L908] COND FALSE !(\read(tmp___2)) [L914] tmp___1 = __VERIFIER_nondet_int() [L916] COND FALSE !(\read(tmp___1)) [L925] CALL timeShift() [L563] COND FALSE !(\read(pumpRunning)) [L570] COND TRUE \read(systemActive) [L572] CALL processEnvironment() [L618] int tmp ; [L621] COND FALSE !(\read(pumpRunning)) [L636] CALL processEnvironment__wrappee__methaneQuery() [L592] int tmp ; [L595] COND TRUE ! pumpRunning [L597] CALL, EXPR isHighWaterLevel() [L732] int retValue_acc ; [L733] int tmp ; [L734] int tmp___0 ; [L738] CALL, EXPR isHighWaterSensorDry() [L854] int retValue_acc ; [L857] COND FALSE !(waterLevel < 2) [L861] retValue_acc = 0 [L862] return (retValue_acc); [L738] RET, EXPR isHighWaterSensorDry() [L738] tmp = isHighWaterSensorDry() [L740] COND FALSE !(\read(tmp)) [L743] tmp___0 = 1 [L745] retValue_acc = tmp___0 [L746] return (retValue_acc); [L597] RET, EXPR isHighWaterLevel() [L597] tmp = isHighWaterLevel() [L599] COND TRUE \read(tmp) [L601] CALL activatePump() [L651] int tmp ; [L655] CALL, EXPR isMethaneAlarm() [L676] int retValue_acc ; [L680] CALL, EXPR isMethaneLevelCritical() [L813] int retValue_acc ; [L816] retValue_acc = methaneLevelCritical [L817] return (retValue_acc); [L680] RET, EXPR isMethaneLevelCritical() [L680] retValue_acc = isMethaneLevelCritical() [L682] return (retValue_acc); [L655] RET, EXPR isMethaneAlarm() [L655] tmp = isMethaneAlarm() [L657] COND FALSE !(\read(tmp)) [L661] CALL activatePump__wrappee__highWaterSensor() [L646] pumpRunning = 1 [L661] RET activatePump__wrappee__highWaterSensor() [L601] RET activatePump() [L636] RET processEnvironment__wrappee__methaneQuery() [L572] RET processEnvironment() [L578] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L845] int retValue_acc ; [L848] retValue_acc = waterLevel [L849] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND FALSE !(tmp == 0) [L578] RET __utac_acc__Specification4_spec__1() [L925] RET timeShift() [L878] COND TRUE 1 [L880] COND TRUE splverifierCounter < 4 [L886] tmp = __VERIFIER_nondet_int() [L888] COND FALSE !(\read(tmp)) [L896] tmp___0 = __VERIFIER_nondet_int() [L898] COND FALSE !(\read(tmp___0)) [L906] tmp___2 = __VERIFIER_nondet_int() [L908] COND FALSE !(\read(tmp___2)) [L914] tmp___1 = __VERIFIER_nondet_int() [L916] COND FALSE !(\read(tmp___1)) [L925] CALL timeShift() [L563] COND TRUE \read(pumpRunning) [L565] CALL lowerWaterLevel() [L780] COND TRUE waterLevel > 0 [L781] waterLevel = waterLevel - 1 [L565] RET lowerWaterLevel() [L570] COND TRUE \read(systemActive) [L572] CALL processEnvironment() [L618] int tmp ; [L621] COND TRUE \read(pumpRunning) [L623] CALL, EXPR isMethaneAlarm() [L676] int retValue_acc ; [L680] CALL, EXPR isMethaneLevelCritical() [L813] int retValue_acc ; [L816] retValue_acc = methaneLevelCritical [L817] return (retValue_acc); [L680] RET, EXPR isMethaneLevelCritical() [L680] retValue_acc = isMethaneLevelCritical() [L682] return (retValue_acc); [L623] RET, EXPR isMethaneAlarm() [L623] tmp = isMethaneAlarm() [L625] COND FALSE !(\read(tmp)) [L631] CALL processEnvironment__wrappee__methaneQuery() [L592] int tmp ; [L595] COND FALSE !(! pumpRunning) [L610] FCALL processEnvironment__wrappee__base() [L631] RET processEnvironment__wrappee__methaneQuery() [L572] RET processEnvironment() [L578] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L845] int retValue_acc ; [L848] retValue_acc = waterLevel [L849] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND FALSE !(tmp == 0) [L578] RET __utac_acc__Specification4_spec__1() [L925] RET timeShift() [L878] COND TRUE 1 [L880] COND TRUE splverifierCounter < 4 [L886] tmp = __VERIFIER_nondet_int() [L888] COND FALSE !(\read(tmp)) [L896] tmp___0 = __VERIFIER_nondet_int() [L898] COND FALSE !(\read(tmp___0)) [L906] tmp___2 = __VERIFIER_nondet_int() [L908] COND FALSE !(\read(tmp___2)) [L914] tmp___1 = __VERIFIER_nondet_int() [L916] COND FALSE !(\read(tmp___1)) [L925] CALL timeShift() [L563] COND TRUE \read(pumpRunning) [L565] CALL lowerWaterLevel() [L780] COND TRUE waterLevel > 0 [L781] waterLevel = waterLevel - 1 [L565] RET lowerWaterLevel() [L570] COND TRUE \read(systemActive) [L572] CALL processEnvironment() [L618] int tmp ; [L621] COND TRUE \read(pumpRunning) [L623] CALL, EXPR isMethaneAlarm() [L676] int retValue_acc ; [L680] CALL, EXPR isMethaneLevelCritical() [L813] int retValue_acc ; [L816] retValue_acc = methaneLevelCritical [L817] return (retValue_acc); [L680] RET, EXPR isMethaneLevelCritical() [L680] retValue_acc = isMethaneLevelCritical() [L682] return (retValue_acc); [L623] RET, EXPR isMethaneAlarm() [L623] tmp = isMethaneAlarm() [L625] COND FALSE !(\read(tmp)) [L631] CALL processEnvironment__wrappee__methaneQuery() [L592] int tmp ; [L595] COND FALSE !(! pumpRunning) [L610] FCALL processEnvironment__wrappee__base() [L631] RET processEnvironment__wrappee__methaneQuery() [L572] RET processEnvironment() [L578] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L845] int retValue_acc ; [L848] retValue_acc = waterLevel [L849] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND TRUE tmp == 0 [L53] CALL, EXPR isPumpRunning() [L687] int retValue_acc ; [L690] retValue_acc = pumpRunning [L691] return (retValue_acc); [L53] RET, EXPR isPumpRunning() [L53] tmp___0 = isPumpRunning() [L55] COND TRUE \read(tmp___0) [L57] CALL __automaton_fail() [L439] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 242 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 52.8s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 44.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1584 SDtfs, 3983 SDslu, 1795 SDs, 0 SdLazy, 11197 SolverSat, 2890 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 578 GetRequests, 390 SyntacticMatches, 6 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 18.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2293occurred 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: 2.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 1512 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 1294 NumberOfCodeBlocks, 1294 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1080 ConstructedInterpolants, 0 QuantifiedInterpolants, 405647 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 172/193 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...