/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:06:48,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:06:48,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:06:48,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:06:48,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:06:48,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:06:48,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:06:48,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:06:48,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:06:48,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:06:48,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:06:48,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:06:48,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:06:48,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:06:48,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:06:48,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:06:48,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:06:48,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:06:48,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:06:48,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:06:48,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:06:48,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:06:48,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:06:48,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:06:48,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:06:48,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:06:48,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:06:48,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:06:48,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:06:48,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:06:48,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:06:48,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:06:48,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:06:48,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:06:48,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:06:48,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:06:48,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:06:48,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:06:48,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:06:48,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:06:48,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:06:48,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 17:06:48,507 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:06:48,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:06:48,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:06:48,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:06:48,509 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:06:48,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:06:48,509 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:06:48,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:06:48,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:06:48,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:06:48,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:06:48,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:06:48,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:06:48,510 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:06:48,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:06:48,511 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:06:48,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:06:48,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:06:48,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:06:48,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:06:48,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:06:48,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:06:48,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:06:48,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:06:48,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:06:48,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:06:48,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:06:48,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:06:48,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:06:48,514 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:06:48,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:06:48,802 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:06:48,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:06:48,807 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:06:48,807 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:06:48,808 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product56.cil.c [2020-08-21 17:06:48,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42f3dce92/62bd9630f554496b87b4f02401993181/FLAG46523657b [2020-08-21 17:06:49,402 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:06:49,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product56.cil.c [2020-08-21 17:06:49,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42f3dce92/62bd9630f554496b87b4f02401993181/FLAG46523657b [2020-08-21 17:06:49,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42f3dce92/62bd9630f554496b87b4f02401993181 [2020-08-21 17:06:49,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:06:49,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:06:49,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:06:49,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:06:49,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:06:49,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:06:49" (1/1) ... [2020-08-21 17:06:49,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a556b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:49, skipping insertion in model container [2020-08-21 17:06:49,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:06:49" (1/1) ... [2020-08-21 17:06:49,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:06:49,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:06:50,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:06:50,171 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:06:50,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:06:50,387 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:06:50,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:50 WrapperNode [2020-08-21 17:06:50,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:06:50,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:06:50,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:06:50,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:06:50,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:50" (1/1) ... [2020-08-21 17:06:50,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:50" (1/1) ... [2020-08-21 17:06:50,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:50" (1/1) ... [2020-08-21 17:06:50,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:50" (1/1) ... [2020-08-21 17:06:50,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:50" (1/1) ... [2020-08-21 17:06:50,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:50" (1/1) ... [2020-08-21 17:06:50,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:50" (1/1) ... [2020-08-21 17:06:50,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:06:50,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:06:50,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:06:50,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:06:50,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:06:50,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:06:50,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:06:50,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 17:06:50,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 17:06:50,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 17:06:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 17:06:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 17:06:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 17:06:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 17:06:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 17:06:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 17:06:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 17:06:50,554 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 17:06:50,554 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-21 17:06:50,554 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 17:06:50,554 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 17:06:50,554 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 17:06:50,554 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 17:06:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 17:06:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 17:06:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 17:06:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 17:06:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 17:06:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 17:06:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 17:06:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 17:06:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 17:06:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 17:06:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 17:06:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 17:06:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 17:06:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 17:06:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 17:06:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 17:06:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:06:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 17:06:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 17:06:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 17:06:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 17:06:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 17:06:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 17:06:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 17:06:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 17:06:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:06:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:06:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 17:06:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 17:06:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 17:06:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 17:06:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 17:06:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 17:06:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 17:06:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 17:06:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 17:06:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 17:06:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:06:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 17:06:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 17:06:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 17:06:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 17:06:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 17:06:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 17:06:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 17:06:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 17:06:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 17:06:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 17:06:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 17:06:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 17:06:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 17:06:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 17:06:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 17:06:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 17:06:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 17:06:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 17:06:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 17:06:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 17:06:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 17:06:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 17:06:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 17:06:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 17:06:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 17:06:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 17:06:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 17:06:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 17:06:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 17:06:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-21 17:06:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 17:06:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 17:06:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 17:06:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 17:06:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 17:06:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 17:06:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 17:06:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 17:06:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 17:06:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:06:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 17:06:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:06:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 17:06:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:06:51,713 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:06:51,713 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 17:06:51,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:06:51 BoogieIcfgContainer [2020-08-21 17:06:51,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:06:51,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:06:51,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:06:51,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:06:51,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:06:49" (1/3) ... [2020-08-21 17:06:51,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72debd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:06:51, skipping insertion in model container [2020-08-21 17:06:51,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:50" (2/3) ... [2020-08-21 17:06:51,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72debd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:06:51, skipping insertion in model container [2020-08-21 17:06:51,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:06:51" (3/3) ... [2020-08-21 17:06:51,728 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product56.cil.c [2020-08-21 17:06:51,739 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:06:51,747 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:06:51,762 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:06:51,788 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:06:51,789 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:06:51,789 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:06:51,789 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:06:51,790 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:06:51,790 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:06:51,790 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:06:51,790 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:06:51,814 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states. [2020-08-21 17:06:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 17:06:51,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:51,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:06:51,826 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:51,833 INFO L82 PathProgramCache]: Analyzing trace with hash 733672736, now seen corresponding path program 1 times [2020-08-21 17:06:51,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:51,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289408788] [2020-08-21 17:06:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:52,544 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:52,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:52,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:52,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:52,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:52,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:52,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:06:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:52,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 17:06:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:06:52,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289408788] [2020-08-21 17:06:52,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:52,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:06:52,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239453530] [2020-08-21 17:06:52,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:06:52,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:52,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:06:52,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:06:52,668 INFO L87 Difference]: Start difference. First operand 196 states. Second operand 3 states. [2020-08-21 17:06:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:54,003 INFO L93 Difference]: Finished difference Result 352 states and 460 transitions. [2020-08-21 17:06:54,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:06:54,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 17:06:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:54,023 INFO L225 Difference]: With dead ends: 352 [2020-08-21 17:06:54,023 INFO L226 Difference]: Without dead ends: 190 [2020-08-21 17:06:54,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:06:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-21 17:06:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 153. [2020-08-21 17:06:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-21 17:06:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2020-08-21 17:06:54,202 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 46 [2020-08-21 17:06:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:54,203 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2020-08-21 17:06:54,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:06:54,203 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2020-08-21 17:06:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 17:06:54,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:54,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:06:54,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:06:54,216 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:54,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:54,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1141201306, now seen corresponding path program 1 times [2020-08-21 17:06:54,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:54,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417832941] [2020-08-21 17:06:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:54,615 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:54,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:54,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:54,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:54,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:54,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:54,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:06:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:54,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:06:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:06:54,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417832941] [2020-08-21 17:06:54,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:54,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:06:54,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55188972] [2020-08-21 17:06:54,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:06:54,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:54,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:06:54,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:06:54,666 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand 4 states. [2020-08-21 17:06:55,099 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:56,162 INFO L93 Difference]: Finished difference Result 275 states and 339 transitions. [2020-08-21 17:06:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:06:56,163 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 17:06:56,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:56,167 INFO L225 Difference]: With dead ends: 275 [2020-08-21 17:06:56,167 INFO L226 Difference]: Without dead ends: 174 [2020-08-21 17:06:56,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:06:56,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-21 17:06:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 144. [2020-08-21 17:06:56,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-21 17:06:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2020-08-21 17:06:56,213 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 47 [2020-08-21 17:06:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:56,214 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2020-08-21 17:06:56,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:06:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2020-08-21 17:06:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 17:06:56,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:56,216 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] [2020-08-21 17:06:56,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:06:56,217 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:56,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:56,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1705860394, now seen corresponding path program 1 times [2020-08-21 17:06:56,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:56,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229608399] [2020-08-21 17:06:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:56,537 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:56,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:56,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:56,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:56,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:56,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:56,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 17:06:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:56,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 17:06:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:06:56,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229608399] [2020-08-21 17:06:56,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:56,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:06:56,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958719054] [2020-08-21 17:06:56,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:06:56,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:56,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:06:56,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:06:56,624 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand 8 states. [2020-08-21 17:06:56,993 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:57,265 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:57,506 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:57,762 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:58,448 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:07:00,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:07:00,639 INFO L93 Difference]: Finished difference Result 491 states and 613 transitions. [2020-08-21 17:07:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:07:00,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 17:07:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:07:00,647 INFO L225 Difference]: With dead ends: 491 [2020-08-21 17:07:00,647 INFO L226 Difference]: Without dead ends: 371 [2020-08-21 17:07:00,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:07:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-08-21 17:07:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 302. [2020-08-21 17:07:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-08-21 17:07:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 368 transitions. [2020-08-21 17:07:00,730 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 368 transitions. Word has length 52 [2020-08-21 17:07:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:07:00,731 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 368 transitions. [2020-08-21 17:07:00,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:07:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 368 transitions. [2020-08-21 17:07:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:07:00,733 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:07:00,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:07:00,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:07:00,734 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:07:00,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:07:00,734 INFO L82 PathProgramCache]: Analyzing trace with hash -986744431, now seen corresponding path program 1 times [2020-08-21 17:07:00,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:07:00,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856054808] [2020-08-21 17:07:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:07:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:01,030 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:07:01,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:07:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:01,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:07:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:01,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:07:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:01,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:07:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:01,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:07:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:01,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:07:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:01,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:07:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:01,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 17:07:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:07:01,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856054808] [2020-08-21 17:07:01,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:07:01,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:07:01,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904452457] [2020-08-21 17:07:01,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:07:01,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:07:01,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:07:01,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:07:01,154 INFO L87 Difference]: Start difference. First operand 302 states and 368 transitions. Second operand 8 states. [2020-08-21 17:07:01,526 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:07:02,389 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:07:02,832 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:07:03,069 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:07:03,306 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:07:03,937 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:07:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:07:05,017 INFO L93 Difference]: Finished difference Result 975 states and 1267 transitions. [2020-08-21 17:07:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 17:07:05,018 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 17:07:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:07:05,024 INFO L225 Difference]: With dead ends: 975 [2020-08-21 17:07:05,024 INFO L226 Difference]: Without dead ends: 697 [2020-08-21 17:07:05,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:07:05,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-08-21 17:07:05,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 559. [2020-08-21 17:07:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-08-21 17:07:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 686 transitions. [2020-08-21 17:07:05,163 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 686 transitions. Word has length 57 [2020-08-21 17:07:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:07:05,164 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 686 transitions. [2020-08-21 17:07:05,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:07:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 686 transitions. [2020-08-21 17:07:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 17:07:05,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:07:05,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:07:05,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:07:05,168 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:07:05,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:07:05,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1925248939, now seen corresponding path program 1 times [2020-08-21 17:07:05,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:07:05,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809352239] [2020-08-21 17:07:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:07:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:05,465 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:07:05,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:07:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:05,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:07:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:05,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:07:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:05,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:07:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:05,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:07:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:05,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:07:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:05,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:07:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:05,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:07:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:05,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 17:07:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:07:05,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809352239] [2020-08-21 17:07:05,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:07:05,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:07:05,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819434124] [2020-08-21 17:07:05,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:07:05,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:07:05,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:07:05,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:07:05,576 INFO L87 Difference]: Start difference. First operand 559 states and 686 transitions. Second operand 9 states. [2020-08-21 17:07:05,915 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:07:06,826 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:07:07,132 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:07:07,360 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:07:07,995 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:07:08,284 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:07:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:07:09,539 INFO L93 Difference]: Finished difference Result 1553 states and 2084 transitions. [2020-08-21 17:07:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 17:07:09,540 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-21 17:07:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:07:09,550 INFO L225 Difference]: With dead ends: 1553 [2020-08-21 17:07:09,550 INFO L226 Difference]: Without dead ends: 1018 [2020-08-21 17:07:09,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-21 17:07:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2020-08-21 17:07:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 831. [2020-08-21 17:07:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-08-21 17:07:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1023 transitions. [2020-08-21 17:07:09,728 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1023 transitions. Word has length 61 [2020-08-21 17:07:09,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:07:09,728 INFO L479 AbstractCegarLoop]: Abstraction has 831 states and 1023 transitions. [2020-08-21 17:07:09,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:07:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1023 transitions. [2020-08-21 17:07:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 17:07:09,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:07:09,731 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:07:09,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:07:09,732 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:07:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:07:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1051920088, now seen corresponding path program 1 times [2020-08-21 17:07:09,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:07:09,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823057938] [2020-08-21 17:07:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:07:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,016 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:07:10,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:07:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:07:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:07:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:07:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:07:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:07:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:07:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:07:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:07:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:07:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:07:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:07:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 17:07:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 17:07:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:07:10,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823057938] [2020-08-21 17:07:10,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:07:10,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:07:10,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229978079] [2020-08-21 17:07:10,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:07:10,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:07:10,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:07:10,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:07:10,152 INFO L87 Difference]: Start difference. First operand 831 states and 1023 transitions. Second operand 9 states. [2020-08-21 17:07:11,217 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:07:11,476 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:07:11,744 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:07:12,028 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:07:13,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:07:13,232 INFO L93 Difference]: Finished difference Result 1901 states and 2517 transitions. [2020-08-21 17:07:13,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:07:13,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-08-21 17:07:13,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:07:13,241 INFO L225 Difference]: With dead ends: 1901 [2020-08-21 17:07:13,241 INFO L226 Difference]: Without dead ends: 1094 [2020-08-21 17:07:13,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:07:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2020-08-21 17:07:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 857. [2020-08-21 17:07:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-08-21 17:07:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1051 transitions. [2020-08-21 17:07:13,488 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1051 transitions. Word has length 89 [2020-08-21 17:07:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:07:13,488 INFO L479 AbstractCegarLoop]: Abstraction has 857 states and 1051 transitions. [2020-08-21 17:07:13,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:07:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1051 transitions. [2020-08-21 17:07:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 17:07:13,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:07:13,492 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:07:13,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:07:13,493 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:07:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:07:13,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1326679702, now seen corresponding path program 1 times [2020-08-21 17:07:13,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:07:13,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574449779] [2020-08-21 17:07:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:07:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,783 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:07:13,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:07:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:07:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:07:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:07:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:07:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:07:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:07:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:07:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:07:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:07:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:07:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:07:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 17:07:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 17:07:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:07:13,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574449779] [2020-08-21 17:07:13,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:07:13,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 17:07:13,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992918512] [2020-08-21 17:07:13,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 17:07:13,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:07:13,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 17:07:13,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:07:13,970 INFO L87 Difference]: Start difference. First operand 857 states and 1051 transitions. Second operand 11 states. [2020-08-21 17:07:14,415 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:07:14,648 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:07:14,869 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:07:15,659 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:07:15,941 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:07:16,209 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:07:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:07:17,417 INFO L93 Difference]: Finished difference Result 1955 states and 2636 transitions. [2020-08-21 17:07:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 17:07:17,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 89 [2020-08-21 17:07:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:07:17,425 INFO L225 Difference]: With dead ends: 1955 [2020-08-21 17:07:17,426 INFO L226 Difference]: Without dead ends: 1122 [2020-08-21 17:07:17,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:07:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2020-08-21 17:07:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 873. [2020-08-21 17:07:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2020-08-21 17:07:17,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1067 transitions. [2020-08-21 17:07:17,608 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1067 transitions. Word has length 89 [2020-08-21 17:07:17,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:07:17,608 INFO L479 AbstractCegarLoop]: Abstraction has 873 states and 1067 transitions. [2020-08-21 17:07:17,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 17:07:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1067 transitions. [2020-08-21 17:07:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 17:07:17,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:07:17,611 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:07:17,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:07:17,611 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:07:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:07:17,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1017987339, now seen corresponding path program 1 times [2020-08-21 17:07:17,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:07:17,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326935799] [2020-08-21 17:07:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:07:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:17,865 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:07:17,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:07:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:17,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:07:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:17,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:07:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:17,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:07:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:17,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:07:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:17,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:07:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:17,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:07:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:17,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:07:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:17,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:07:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:18,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:07:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:18,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:07:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:18,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:07:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:18,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 17:07:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:18,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 17:07:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:07:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:07:18,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326935799] [2020-08-21 17:07:18,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:07:18,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 17:07:18,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68353469] [2020-08-21 17:07:18,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:07:18,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:07:18,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:07:18,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:07:18,056 INFO L87 Difference]: Start difference. First operand 873 states and 1067 transitions. Second operand 7 states. [2020-08-21 17:07:18,385 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:07:18,841 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:07:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:07:21,577 INFO L93 Difference]: Finished difference Result 2923 states and 3961 transitions. [2020-08-21 17:07:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:07:21,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2020-08-21 17:07:21,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:07:21,591 INFO L225 Difference]: With dead ends: 2923 [2020-08-21 17:07:21,591 INFO L226 Difference]: Without dead ends: 2074 [2020-08-21 17:07:21,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:07:21,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2020-08-21 17:07:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1751. [2020-08-21 17:07:21,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1751 states. [2020-08-21 17:07:22,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2157 transitions. [2020-08-21 17:07:22,006 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2157 transitions. Word has length 89 [2020-08-21 17:07:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:07:22,007 INFO L479 AbstractCegarLoop]: Abstraction has 1751 states and 2157 transitions. [2020-08-21 17:07:22,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:07:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2157 transitions. [2020-08-21 17:07:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 17:07:22,011 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:07:22,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:07:22,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:07:22,011 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:07:22,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:07:22,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1174397627, now seen corresponding path program 1 times [2020-08-21 17:07:22,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:07:22,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674892096] [2020-08-21 17:07:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:07:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 17:07:22,077 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 17:07:22,077 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 17:07:22,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:07:22,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:07:22 BoogieIcfgContainer [2020-08-21 17:07:22,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:07:22,128 INFO L168 Benchmark]: Toolchain (without parser) took 32400.86 ms. Allocated memory was 141.6 MB in the beginning and 652.7 MB in the end (delta: 511.2 MB). Free memory was 103.6 MB in the beginning and 287.7 MB in the end (delta: -184.1 MB). Peak memory consumption was 327.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:07:22,129 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 17:07:22,137 INFO L168 Benchmark]: CACSL2BoogieTranslator took 659.45 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.4 MB in the beginning and 174.0 MB in the end (delta: -70.6 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:07:22,140 INFO L168 Benchmark]: Boogie Preprocessor took 91.71 ms. Allocated memory is still 205.5 MB. Free memory was 174.0 MB in the beginning and 169.9 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:07:22,141 INFO L168 Benchmark]: RCFGBuilder took 1238.40 ms. Allocated memory was 205.5 MB in the beginning and 236.5 MB in the end (delta: 30.9 MB). Free memory was 169.9 MB in the beginning and 190.5 MB in the end (delta: -20.6 MB). Peak memory consumption was 81.4 MB. Max. memory is 7.1 GB. [2020-08-21 17:07:22,142 INFO L168 Benchmark]: TraceAbstraction took 30406.12 ms. Allocated memory was 236.5 MB in the beginning and 652.7 MB in the end (delta: 416.3 MB). Free memory was 189.2 MB in the beginning and 287.7 MB in the end (delta: -98.6 MB). Peak memory consumption was 317.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:07:22,150 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 659.45 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.4 MB in the beginning and 174.0 MB in the end (delta: -70.6 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 91.71 ms. Allocated memory is still 205.5 MB. Free memory was 174.0 MB in the beginning and 169.9 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1238.40 ms. Allocated memory was 205.5 MB in the beginning and 236.5 MB in the end (delta: 30.9 MB). Free memory was 169.9 MB in the beginning and 190.5 MB in the end (delta: -20.6 MB). Peak memory consumption was 81.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30406.12 ms. Allocated memory was 236.5 MB in the beginning and 652.7 MB in the end (delta: 416.3 MB). Free memory was 189.2 MB in the beginning and 287.7 MB in the end (delta: -98.6 MB). Peak memory consumption was 317.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 806]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L209] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L490] int pumpRunning = 0; [L491] int systemActive = 1; [L811] int cleanupTimeShifts = 4; [L908] int waterLevel = 1; [L909] int methaneLevelCritical = 0; [L884] int retValue_acc ; [L885] int tmp ; [L889] FCALL select_helpers() [L890] FCALL select_features() [L891] CALL, EXPR valid_product() [L766] int retValue_acc ; [L769] retValue_acc = 1 [L770] return (retValue_acc); [L891] RET, EXPR valid_product() [L891] tmp = valid_product() [L893] COND TRUE \read(tmp) [L895] FCALL setup() [L896] CALL runTest() [L878] CALL test() [L413] int splverifierCounter ; [L414] int tmp ; [L415] int tmp___0 ; [L416] int tmp___1 ; [L417] int tmp___2 ; [L420] splverifierCounter = 0 [L422] COND TRUE 1 [L424] COND TRUE splverifierCounter < 4 [L430] tmp = __VERIFIER_nondet_int() [L432] COND TRUE \read(tmp) [L434] CALL waterRise() [L926] COND TRUE waterLevel < 2 [L927] waterLevel = waterLevel + 1 [L434] RET waterRise() [L440] tmp___0 = __VERIFIER_nondet_int() [L442] COND TRUE \read(tmp___0) [L444] CALL changeMethaneLevel() [L938] COND FALSE !(\read(methaneLevelCritical)) [L941] methaneLevelCritical = 1 [L444] RET changeMethaneLevel() [L450] tmp___2 = __VERIFIER_nondet_int() [L452] COND FALSE !(\read(tmp___2)) [L458] tmp___1 = __VERIFIER_nondet_int() [L460] COND FALSE !(\read(tmp___1)) [L469] CALL timeShift() [L498] COND FALSE !(\read(pumpRunning)) [L505] COND TRUE \read(systemActive) [L507] CALL processEnvironment() [L579] int tmp ; [L582] COND FALSE !(\read(pumpRunning)) [L597] CALL processEnvironment__wrappee__lowWaterSensor() [L553] int tmp ; [L556] COND FALSE !(\read(pumpRunning)) [L571] CALL processEnvironment__wrappee__highWaterSensor() [L527] int tmp ; [L530] COND TRUE ! pumpRunning [L532] CALL, EXPR isHighWaterLevel() [L676] int retValue_acc ; [L677] int tmp ; [L678] int tmp___0 ; [L682] CALL, EXPR isHighWaterSensorDry() [L988] int retValue_acc ; [L991] COND FALSE !(waterLevel < 2) [L995] retValue_acc = 0 [L996] return (retValue_acc); [L682] RET, EXPR isHighWaterSensorDry() [L682] tmp = isHighWaterSensorDry() [L684] COND FALSE !(\read(tmp)) [L687] tmp___0 = 1 [L689] retValue_acc = tmp___0 [L690] return (retValue_acc); [L532] RET, EXPR isHighWaterLevel() [L532] tmp = isHighWaterLevel() [L534] COND TRUE \read(tmp) [L536] CALL activatePump() [L607] pumpRunning = 1 [L536] RET activatePump() [L571] RET processEnvironment__wrappee__highWaterSensor() [L597] RET processEnvironment__wrappee__lowWaterSensor() [L507] RET processEnvironment() [L513] CALL __utac_acc__Specification1_spec__1() [L777] int tmp ; [L778] int tmp___0 ; [L782] CALL, EXPR isMethaneLevelCritical() [L947] int retValue_acc ; [L950] retValue_acc = methaneLevelCritical [L951] return (retValue_acc); [L782] RET, EXPR isMethaneLevelCritical() [L782] tmp = isMethaneLevelCritical() [L784] COND TRUE \read(tmp) [L786] CALL, EXPR isPumpRunning() [L631] int retValue_acc ; [L634] retValue_acc = pumpRunning [L635] return (retValue_acc); [L786] RET, EXPR isPumpRunning() [L786] tmp___0 = isPumpRunning() [L788] COND TRUE \read(tmp___0) [L790] CALL __automaton_fail() [L806] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 43 procedures, 255 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.2s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 24.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1133 SDtfs, 2314 SDslu, 1166 SDs, 0 SdLazy, 5887 SolverSat, 1575 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1751occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 8 MinimizatonAttempts, 1270 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 623 NumberOfCodeBlocks, 623 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 522 ConstructedInterpolants, 0 QuantifiedInterpolants, 159558 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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...