/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 interpolation-heuristic=FIRST --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_product55.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:41:55,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:41:55,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:41:55,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:41:55,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:41:55,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:41:55,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:41:55,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:41:55,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:41:55,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:41:55,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:41:55,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:41:55,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:41:55,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:41:55,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:41:55,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:41:55,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:41:55,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:41:55,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:41:55,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:41:55,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:41:55,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:41:55,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:41:55,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:41:55,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:41:55,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:41:55,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:41:55,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:41:55,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:41:55,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:41:55,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:41:55,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:41:55,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:41:55,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:41:55,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:41:55,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:41:55,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:41:55,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:41:55,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:41:55,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:41:55,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:41:55,399 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 14:41:55,442 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:41:55,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:41:55,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:41:55,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:41:55,444 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:41:55,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:41:55,445 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:41:55,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:41:55,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:41:55,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:41:55,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:41:55,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:41:55,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:41:55,448 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:41:55,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:41:55,448 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:41:55,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:41:55,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:41:55,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:41:55,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:41:55,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:41:55,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:41:55,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:41:55,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:41:55,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:41:55,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:41:55,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:41:55,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:41:55,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:41:55,451 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:41:55,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:41:55,747 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:41:55,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:41:55,751 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:41:55,752 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:41:55,753 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product55.cil.c [2020-08-21 14:41:55,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc0797129/463ca9cc3a0a4ed68a63fc4cf50cd334/FLAG6eac68850 [2020-08-21 14:41:56,401 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:41:56,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product55.cil.c [2020-08-21 14:41:56,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc0797129/463ca9cc3a0a4ed68a63fc4cf50cd334/FLAG6eac68850 [2020-08-21 14:41:56,680 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc0797129/463ca9cc3a0a4ed68a63fc4cf50cd334 [2020-08-21 14:41:56,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:41:56,690 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:41:56,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:41:56,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:41:56,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:41:56,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:41:56" (1/1) ... [2020-08-21 14:41:56,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b610eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:56, skipping insertion in model container [2020-08-21 14:41:56,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:41:56" (1/1) ... [2020-08-21 14:41:56,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:41:56,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:41:57,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:41:57,251 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:41:57,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:41:57,361 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:41:57,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:57 WrapperNode [2020-08-21 14:41:57,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:41:57,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:41:57,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:41:57,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:41:57,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:57" (1/1) ... [2020-08-21 14:41:57,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:57" (1/1) ... [2020-08-21 14:41:57,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:57" (1/1) ... [2020-08-21 14:41:57,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:57" (1/1) ... [2020-08-21 14:41:57,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:57" (1/1) ... [2020-08-21 14:41:57,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:57" (1/1) ... [2020-08-21 14:41:57,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:57" (1/1) ... [2020-08-21 14:41:57,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:41:57,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:41:57,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:41:57,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:41:57,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:57" (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 14:41:57,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:41:57,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:41:57,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 14:41:57,583 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 14:41:57,584 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 14:41:57,584 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 14:41:57,584 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 14:41:57,585 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 14:41:57,585 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 14:41:57,585 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 14:41:57,586 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 14:41:57,586 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-21 14:41:57,586 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 14:41:57,587 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 14:41:57,587 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 14:41:57,587 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 14:41:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 14:41:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 14:41:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 14:41:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 14:41:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 14:41:57,589 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 14:41:57,589 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 14:41:57,589 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 14:41:57,590 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 14:41:57,590 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 14:41:57,590 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 14:41:57,590 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 14:41:57,591 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 14:41:57,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 14:41:57,591 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 14:41:57,591 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 14:41:57,591 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 14:41:57,592 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 14:41:57,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:41:57,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 14:41:57,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 14:41:57,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 14:41:57,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 14:41:57,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 14:41:57,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 14:41:57,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 14:41:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:41:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:41:57,594 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 14:41:57,594 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 14:41:57,594 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 14:41:57,594 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 14:41:57,594 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 14:41:57,595 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 14:41:57,595 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 14:41:57,595 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 14:41:57,595 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 14:41:57,596 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 14:41:57,596 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 14:41:57,596 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 14:41:57,596 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 14:41:57,596 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 14:41:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 14:41:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 14:41:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 14:41:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 14:41:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 14:41:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 14:41:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 14:41:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 14:41:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 14:41:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 14:41:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 14:41:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 14:41:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-21 14:41:57,599 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 14:41:57,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 14:41:57,600 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 14:41:57,600 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 14:41:57,602 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 14:41:57,602 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 14:41:57,602 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 14:41:57,602 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:41:57,602 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 14:41:57,603 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 14:41:57,603 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 14:41:57,603 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 14:41:57,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 14:41:57,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 14:41:57,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 14:41:57,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 14:41:57,605 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 14:41:57,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:41:57,605 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 14:41:57,605 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 14:41:57,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 14:41:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 14:41:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 14:41:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 14:41:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:41:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 14:41:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:41:58,759 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:41:58,760 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 14:41:58,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:41:58 BoogieIcfgContainer [2020-08-21 14:41:58,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:41:58,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:41:58,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:41:58,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:41:58,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:41:56" (1/3) ... [2020-08-21 14:41:58,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc5e0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:41:58, skipping insertion in model container [2020-08-21 14:41:58,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:57" (2/3) ... [2020-08-21 14:41:58,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc5e0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:41:58, skipping insertion in model container [2020-08-21 14:41:58,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:41:58" (3/3) ... [2020-08-21 14:41:58,774 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product55.cil.c [2020-08-21 14:41:58,785 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:41:58,793 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:41:58,808 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:41:58,833 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:41:58,834 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:41:58,834 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:41:58,834 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:41:58,834 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:41:58,835 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:41:58,835 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:41:58,835 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:41:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states. [2020-08-21 14:41:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 14:41:58,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:58,870 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 14:41:58,870 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:58,876 INFO L82 PathProgramCache]: Analyzing trace with hash 616057763, now seen corresponding path program 1 times [2020-08-21 14:41:58,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:58,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946016004] [2020-08-21 14:41:58,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,543 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:59,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 14:41:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 14:41:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,671 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 14:41:59,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946016004] [2020-08-21 14:41:59,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:59,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:41:59,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985014022] [2020-08-21 14:41:59,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:41:59,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:59,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:41:59,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:41:59,701 INFO L87 Difference]: Start difference. First operand 192 states. Second operand 3 states. [2020-08-21 14:42:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:00,970 INFO L93 Difference]: Finished difference Result 343 states and 450 transitions. [2020-08-21 14:42:00,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:42:00,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 14:42:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:00,988 INFO L225 Difference]: With dead ends: 343 [2020-08-21 14:42:00,988 INFO L226 Difference]: Without dead ends: 185 [2020-08-21 14:42:00,993 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 14:42:01,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-08-21 14:42:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 149. [2020-08-21 14:42:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-21 14:42:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2020-08-21 14:42:01,109 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 46 [2020-08-21 14:42:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:01,109 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2020-08-21 14:42:01,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:42:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2020-08-21 14:42:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 14:42:01,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:01,114 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 14:42:01,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:42:01,115 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:01,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:01,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2016430514, now seen corresponding path program 1 times [2020-08-21 14:42:01,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:01,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493503008] [2020-08-21 14:42:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:01,490 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:01,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:01,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:01,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:01,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:01,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:01,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 14:42:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:01,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:42:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:01,540 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 14:42:01,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493503008] [2020-08-21 14:42:01,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:01,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:42:01,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495110463] [2020-08-21 14:42:01,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:42:01,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:01,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:42:01,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:42:01,545 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 4 states. [2020-08-21 14:42:02,004 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:03,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:03,009 INFO L93 Difference]: Finished difference Result 270 states and 333 transitions. [2020-08-21 14:42:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:42:03,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 14:42:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:03,018 INFO L225 Difference]: With dead ends: 270 [2020-08-21 14:42:03,018 INFO L226 Difference]: Without dead ends: 169 [2020-08-21 14:42:03,023 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 14:42:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-21 14:42:03,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 140. [2020-08-21 14:42:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 14:42:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2020-08-21 14:42:03,096 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 47 [2020-08-21 14:42:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:03,097 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2020-08-21 14:42:03,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:42:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2020-08-21 14:42:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 14:42:03,110 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:03,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:42:03,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:42:03,111 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:03,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:03,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1603631393, now seen corresponding path program 1 times [2020-08-21 14:42:03,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:03,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255995854] [2020-08-21 14:42:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,487 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:03,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:42:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:42:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,589 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 14:42:03,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255995854] [2020-08-21 14:42:03,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:03,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:42:03,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492437037] [2020-08-21 14:42:03,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:42:03,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:03,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:42:03,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:42:03,592 INFO L87 Difference]: Start difference. First operand 140 states and 166 transitions. Second operand 8 states. [2020-08-21 14:42:03,972 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:04,297 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:04,545 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:04,779 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:05,522 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:07,581 INFO L93 Difference]: Finished difference Result 476 states and 596 transitions. [2020-08-21 14:42:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:42:07,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-21 14:42:07,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:07,597 INFO L225 Difference]: With dead ends: 476 [2020-08-21 14:42:07,597 INFO L226 Difference]: Without dead ends: 360 [2020-08-21 14:42:07,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:42:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-08-21 14:42:07,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 298. [2020-08-21 14:42:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-08-21 14:42:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2020-08-21 14:42:07,673 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 51 [2020-08-21 14:42:07,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:07,674 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2020-08-21 14:42:07,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:42:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2020-08-21 14:42:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 14:42:07,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:07,676 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 14:42:07,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:42:07,676 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:07,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:07,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1180849517, now seen corresponding path program 1 times [2020-08-21 14:42:07,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:07,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324152154] [2020-08-21 14:42:07,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:07,967 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:07,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:07,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:07,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 14:42:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:42:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:42:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,075 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 14:42:08,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324152154] [2020-08-21 14:42:08,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:08,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:42:08,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167215043] [2020-08-21 14:42:08,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:42:08,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:08,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:42:08,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:42:08,078 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand 8 states. [2020-08-21 14:42:08,481 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:09,375 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:09,805 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:10,131 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:10,395 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:11,012 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:12,187 INFO L93 Difference]: Finished difference Result 960 states and 1249 transitions. [2020-08-21 14:42:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:42:12,189 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 14:42:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:12,196 INFO L225 Difference]: With dead ends: 960 [2020-08-21 14:42:12,196 INFO L226 Difference]: Without dead ends: 686 [2020-08-21 14:42:12,198 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 14:42:12,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2020-08-21 14:42:12,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 551. [2020-08-21 14:42:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-08-21 14:42:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 678 transitions. [2020-08-21 14:42:12,324 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 678 transitions. Word has length 57 [2020-08-21 14:42:12,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:12,325 INFO L479 AbstractCegarLoop]: Abstraction has 551 states and 678 transitions. [2020-08-21 14:42:12,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:42:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 678 transitions. [2020-08-21 14:42:12,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 14:42:12,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:12,328 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 14:42:12,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:42:12,328 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:12,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:12,328 INFO L82 PathProgramCache]: Analyzing trace with hash -687352489, now seen corresponding path program 1 times [2020-08-21 14:42:12,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:12,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776996160] [2020-08-21 14:42:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:12,607 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:12,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:12,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:12,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:12,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:12,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:12,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:42:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:12,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:42:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:12,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 14:42:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:12,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 14:42:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:12,715 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 14:42:12,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776996160] [2020-08-21 14:42:12,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:12,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:42:12,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147031795] [2020-08-21 14:42:12,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:42:12,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:12,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:42:12,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:42:12,719 INFO L87 Difference]: Start difference. First operand 551 states and 678 transitions. Second operand 9 states. [2020-08-21 14:42:13,093 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:13,985 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:14,264 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:14,497 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:15,151 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:15,444 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:16,565 INFO L93 Difference]: Finished difference Result 1523 states and 2048 transitions. [2020-08-21 14:42:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:42:16,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-21 14:42:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:16,574 INFO L225 Difference]: With dead ends: 1523 [2020-08-21 14:42:16,574 INFO L226 Difference]: Without dead ends: 996 [2020-08-21 14:42:16,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:42:16,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2020-08-21 14:42:16,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 815. [2020-08-21 14:42:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 815 states. [2020-08-21 14:42:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1007 transitions. [2020-08-21 14:42:16,722 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1007 transitions. Word has length 61 [2020-08-21 14:42:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:16,723 INFO L479 AbstractCegarLoop]: Abstraction has 815 states and 1007 transitions. [2020-08-21 14:42:16,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:42:16,723 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1007 transitions. [2020-08-21 14:42:16,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 14:42:16,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:16,725 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] [2020-08-21 14:42:16,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:42:16,726 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:16,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1185420344, now seen corresponding path program 1 times [2020-08-21 14:42:16,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:16,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841033755] [2020-08-21 14:42:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:16,967 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:16,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:16,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:16,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:16,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:16,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:16,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:42:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:17,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:42:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:17,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:17,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:17,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:17,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:42:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:17,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:42:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:17,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 14:42:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:17,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 14:42:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:17,100 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 14:42:17,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841033755] [2020-08-21 14:42:17,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:17,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:42:17,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255018701] [2020-08-21 14:42:17,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:42:17,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:42:17,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:42:17,103 INFO L87 Difference]: Start difference. First operand 815 states and 1007 transitions. Second operand 9 states. [2020-08-21 14:42:18,052 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:18,350 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:42:18,606 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:18,860 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:20,018 INFO L93 Difference]: Finished difference Result 1863 states and 2473 transitions. [2020-08-21 14:42:20,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:42:20,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-08-21 14:42:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:20,033 INFO L225 Difference]: With dead ends: 1863 [2020-08-21 14:42:20,034 INFO L226 Difference]: Without dead ends: 1072 [2020-08-21 14:42:20,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:42:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2020-08-21 14:42:20,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 841. [2020-08-21 14:42:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2020-08-21 14:42:20,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1035 transitions. [2020-08-21 14:42:20,220 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1035 transitions. Word has length 88 [2020-08-21 14:42:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:20,221 INFO L479 AbstractCegarLoop]: Abstraction has 841 states and 1035 transitions. [2020-08-21 14:42:20,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:42:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1035 transitions. [2020-08-21 14:42:20,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 14:42:20,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:20,226 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] [2020-08-21 14:42:20,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:42:20,227 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:20,227 INFO L82 PathProgramCache]: Analyzing trace with hash -910660730, now seen corresponding path program 1 times [2020-08-21 14:42:20,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:20,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541335951] [2020-08-21 14:42:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,518 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:20,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:42:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:42:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:42:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:42:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 14:42:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 14:42:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:20,713 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 14:42:20,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541335951] [2020-08-21 14:42:20,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:20,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 14:42:20,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903597083] [2020-08-21 14:42:20,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:42:20,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:20,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:42:20,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:42:20,722 INFO L87 Difference]: Start difference. First operand 841 states and 1035 transitions. Second operand 11 states. [2020-08-21 14:42:21,260 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:21,484 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:21,720 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:22,443 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:22,691 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:22,930 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:24,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:24,236 INFO L93 Difference]: Finished difference Result 1917 states and 2592 transitions. [2020-08-21 14:42:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:42:24,237 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 88 [2020-08-21 14:42:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:24,245 INFO L225 Difference]: With dead ends: 1917 [2020-08-21 14:42:24,245 INFO L226 Difference]: Without dead ends: 1100 [2020-08-21 14:42:24,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:42:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2020-08-21 14:42:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 857. [2020-08-21 14:42:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-08-21 14:42:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1051 transitions. [2020-08-21 14:42:24,409 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1051 transitions. Word has length 88 [2020-08-21 14:42:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:24,409 INFO L479 AbstractCegarLoop]: Abstraction has 857 states and 1051 transitions. [2020-08-21 14:42:24,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:42:24,410 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1051 transitions. [2020-08-21 14:42:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 14:42:24,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:24,412 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] [2020-08-21 14:42:24,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:42:24,412 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:24,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1039639525, now seen corresponding path program 1 times [2020-08-21 14:42:24,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:24,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600809103] [2020-08-21 14:42:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,751 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:24,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:42:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:42:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:42:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:42:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 14:42:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 14:42:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:24,954 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 14:42:24,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600809103] [2020-08-21 14:42:24,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:24,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 14:42:24,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140980596] [2020-08-21 14:42:24,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:42:24,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:24,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:42:24,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:42:24,959 INFO L87 Difference]: Start difference. First operand 857 states and 1051 transitions. Second operand 7 states. [2020-08-21 14:42:25,385 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:25,850 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:28,575 INFO L93 Difference]: Finished difference Result 2846 states and 3865 transitions. [2020-08-21 14:42:28,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:42:28,576 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 88 [2020-08-21 14:42:28,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:28,589 INFO L225 Difference]: With dead ends: 2846 [2020-08-21 14:42:28,589 INFO L226 Difference]: Without dead ends: 2013 [2020-08-21 14:42:28,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:42:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2020-08-21 14:42:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1711. [2020-08-21 14:42:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1711 states. [2020-08-21 14:42:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2117 transitions. [2020-08-21 14:42:28,985 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2117 transitions. Word has length 88 [2020-08-21 14:42:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:28,986 INFO L479 AbstractCegarLoop]: Abstraction has 1711 states and 2117 transitions. [2020-08-21 14:42:28,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:42:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2117 transitions. [2020-08-21 14:42:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 14:42:28,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:28,989 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] [2020-08-21 14:42:28,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:42:28,990 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:28,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:28,990 INFO L82 PathProgramCache]: Analyzing trace with hash 745790239, now seen corresponding path program 1 times [2020-08-21 14:42:28,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:28,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620346270] [2020-08-21 14:42:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:42:29,075 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:42:29,075 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:42:29,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:42:29,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:42:29 BoogieIcfgContainer [2020-08-21 14:42:29,121 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:42:29,123 INFO L168 Benchmark]: Toolchain (without parser) took 32432.86 ms. Allocated memory was 140.5 MB in the beginning and 695.2 MB in the end (delta: 554.7 MB). Free memory was 100.5 MB in the beginning and 380.5 MB in the end (delta: -280.0 MB). Peak memory consumption was 274.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:29,124 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:42:29,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 671.05 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 100.3 MB in the beginning and 169.5 MB in the end (delta: -69.2 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:29,136 INFO L168 Benchmark]: Boogie Preprocessor took 136.88 ms. Allocated memory is still 203.9 MB. Free memory was 169.5 MB in the beginning and 165.7 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:29,136 INFO L168 Benchmark]: RCFGBuilder took 1263.74 ms. Allocated memory was 203.9 MB in the beginning and 235.9 MB in the end (delta: 32.0 MB). Free memory was 165.7 MB in the beginning and 191.3 MB in the end (delta: -25.6 MB). Peak memory consumption was 80.3 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:29,137 INFO L168 Benchmark]: TraceAbstraction took 30353.82 ms. Allocated memory was 235.9 MB in the beginning and 695.2 MB in the end (delta: 459.3 MB). Free memory was 189.9 MB in the beginning and 380.5 MB in the end (delta: -190.6 MB). Peak memory consumption was 268.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:29,145 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 671.05 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 100.3 MB in the beginning and 169.5 MB in the end (delta: -69.2 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.88 ms. Allocated memory is still 203.9 MB. Free memory was 169.5 MB in the beginning and 165.7 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1263.74 ms. Allocated memory was 203.9 MB in the beginning and 235.9 MB in the end (delta: 32.0 MB). Free memory was 165.7 MB in the beginning and 191.3 MB in the end (delta: -25.6 MB). Peak memory consumption was 80.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30353.82 ms. Allocated memory was 235.9 MB in the beginning and 695.2 MB in the end (delta: 459.3 MB). Free memory was 189.9 MB in the beginning and 380.5 MB in the end (delta: -190.6 MB). Peak memory consumption was 268.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 506]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L159] int pumpRunning = 0; [L160] int systemActive = 1; [L399] int waterLevel = 1; [L400] int methaneLevelCritical = 0; [L511] int cleanupTimeShifts = 4; [L802] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L584] int retValue_acc ; [L585] int tmp ; [L589] FCALL select_helpers() [L590] FCALL select_features() [L591] CALL, EXPR valid_product() [L69] int retValue_acc ; [L72] retValue_acc = 1 [L73] return (retValue_acc); [L591] RET, EXPR valid_product() [L591] tmp = valid_product() [L593] COND TRUE \read(tmp) [L595] FCALL setup() [L596] CALL runTest() [L578] CALL test() [L84] int splverifierCounter ; [L85] int tmp ; [L86] int tmp___0 ; [L87] int tmp___1 ; [L88] int tmp___2 ; [L91] splverifierCounter = 0 [L93] COND TRUE 1 [L95] COND TRUE splverifierCounter < 4 [L101] tmp = __VERIFIER_nondet_int() [L103] COND TRUE \read(tmp) [L105] CALL waterRise() [L417] COND TRUE waterLevel < 2 [L418] waterLevel = waterLevel + 1 [L105] RET waterRise() [L111] tmp___0 = __VERIFIER_nondet_int() [L113] COND TRUE \read(tmp___0) [L115] CALL changeMethaneLevel() [L429] COND FALSE !(\read(methaneLevelCritical)) [L432] methaneLevelCritical = 1 [L115] RET changeMethaneLevel() [L121] tmp___2 = __VERIFIER_nondet_int() [L123] COND TRUE \read(tmp___2) [L138] CALL timeShift() [L167] COND FALSE !(\read(pumpRunning)) [L174] COND TRUE \read(systemActive) [L176] CALL processEnvironment() [L248] int tmp ; [L251] COND FALSE !(\read(pumpRunning)) [L266] CALL processEnvironment__wrappee__lowWaterSensor() [L222] int tmp ; [L225] COND FALSE !(\read(pumpRunning)) [L240] CALL processEnvironment__wrappee__highWaterSensor() [L196] int tmp ; [L199] COND TRUE ! pumpRunning [L201] CALL, EXPR isHighWaterLevel() [L345] int retValue_acc ; [L346] int tmp ; [L347] int tmp___0 ; [L351] CALL, EXPR isHighWaterSensorDry() [L479] int retValue_acc ; [L482] COND FALSE !(waterLevel < 2) [L486] retValue_acc = 0 [L487] return (retValue_acc); [L351] RET, EXPR isHighWaterSensorDry() [L351] tmp = isHighWaterSensorDry() [L353] COND FALSE !(\read(tmp)) [L356] tmp___0 = 1 [L358] retValue_acc = tmp___0 [L359] return (retValue_acc); [L201] RET, EXPR isHighWaterLevel() [L201] tmp = isHighWaterLevel() [L203] COND TRUE \read(tmp) [L205] CALL activatePump() [L276] pumpRunning = 1 [L205] RET activatePump() [L240] RET processEnvironment__wrappee__highWaterSensor() [L266] RET processEnvironment__wrappee__lowWaterSensor() [L176] RET processEnvironment() [L182] CALL __utac_acc__Specification1_spec__1() [L608] int tmp ; [L609] int tmp___0 ; [L613] CALL, EXPR isMethaneLevelCritical() [L438] int retValue_acc ; [L441] retValue_acc = methaneLevelCritical [L442] return (retValue_acc); [L613] RET, EXPR isMethaneLevelCritical() [L613] tmp = isMethaneLevelCritical() [L615] COND TRUE \read(tmp) [L617] CALL, EXPR isPumpRunning() [L300] int retValue_acc ; [L303] retValue_acc = pumpRunning [L304] return (retValue_acc); [L617] RET, EXPR isPumpRunning() [L617] tmp___0 = isPumpRunning() [L619] COND TRUE \read(tmp___0) [L621] CALL __automaton_fail() [L506] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 42 procedures, 251 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: 1101 SDtfs, 1942 SDslu, 1151 SDs, 0 SdLazy, 5846 SolverSat, 1208 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=1711occurred 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: 1.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 1219 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 618 NumberOfCodeBlocks, 618 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 518 ConstructedInterpolants, 0 QuantifiedInterpolants, 157644 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...