/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_spec3_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:25:57,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 00:25:57,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 00:25:57,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 00:25:57,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 00:25:57,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 00:25:57,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 00:25:57,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 00:25:57,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 00:25:57,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 00:25:57,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 00:25:57,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 00:25:57,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:25:57,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:25:57,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:25:57,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:25:57,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:25:57,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:25:57,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:25:57,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:25:57,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:25:57,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:25:57,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:25:57,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:25:57,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 00:25:57,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 00:25:57,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 00:25:57,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 00:25:57,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 00:25:57,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 00:25:57,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 00:25:57,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 00:25:57,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 00:25:57,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 00:25:57,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 00:25:57,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 00:25:57,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 00:25:57,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 00:25:57,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:25:57,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:25:57,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:25:57,376 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 [2020-08-22 00:25:57,414 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:25:57,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:25:57,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:25:57,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:25:57,417 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:25:57,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:25:57,418 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 00:25:57,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:25:57,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 00:25:57,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:25:57,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:25:57,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:25:57,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:25:57,420 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 00:25:57,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:25:57,421 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:25:57,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:25:57,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:25:57,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:25:57,421 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:25:57,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:25:57,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:25:57,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:25:57,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:25:57,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:25:57,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:25:57,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:25:57,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:25:57,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:25:57,424 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-08-22 00:25:57,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:25:57,710 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:25:57,714 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:25:57,715 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:25:57,716 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:25:57,716 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product24.cil.c [2020-08-22 00:25:57,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/525d0c9ea/6eb18e2b9d514afbaf637021f3f737c2/FLAG549c31bb1 [2020-08-22 00:25:58,342 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:25:58,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product24.cil.c [2020-08-22 00:25:58,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/525d0c9ea/6eb18e2b9d514afbaf637021f3f737c2/FLAG549c31bb1 [2020-08-22 00:25:58,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/525d0c9ea/6eb18e2b9d514afbaf637021f3f737c2 [2020-08-22 00:25:58,603 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:25:58,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:25:58,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:25:58,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:25:58,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:25:58,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:25:58" (1/1) ... [2020-08-22 00:25:58,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a556b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:25:58, skipping insertion in model container [2020-08-22 00:25:58,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:25:58" (1/1) ... [2020-08-22 00:25:58,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:25:58,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:25:58,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:25:59,004 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:25:59,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:25:59,247 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:25:59,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:25:59 WrapperNode [2020-08-22 00:25:59,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:25:59,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:25:59,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:25:59,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:25:59,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:25:59" (1/1) ... [2020-08-22 00:25:59,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:25:59" (1/1) ... [2020-08-22 00:25:59,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:25:59" (1/1) ... [2020-08-22 00:25:59,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:25:59" (1/1) ... [2020-08-22 00:25:59,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:25:59" (1/1) ... [2020-08-22 00:25:59,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:25:59" (1/1) ... [2020-08-22 00:25:59,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:25:59" (1/1) ... [2020-08-22 00:25:59,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:25:59,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:25:59,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:25:59,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:25:59,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:25:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:25:59,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:25:59,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:25:59,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-22 00:25:59,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-22 00:25:59,426 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-22 00:25:59,426 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-22 00:25:59,426 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-22 00:25:59,426 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-22 00:25:59,426 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-22 00:25:59,427 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-22 00:25:59,427 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-22 00:25:59,427 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-22 00:25:59,427 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-22 00:25:59,427 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-22 00:25:59,427 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-22 00:25:59,428 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-22 00:25:59,428 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-22 00:25:59,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-22 00:25:59,428 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-22 00:25:59,428 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-22 00:25:59,428 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-22 00:25:59,429 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-22 00:25:59,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:25:59,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-22 00:25:59,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-22 00:25:59,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-22 00:25:59,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-22 00:25:59,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-22 00:25:59,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-22 00:25:59,430 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-22 00:25:59,430 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-22 00:25:59,430 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-22 00:25:59,430 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-22 00:25:59,431 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-22 00:25:59,431 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-22 00:25:59,431 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-22 00:25:59,431 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-22 00:25:59,431 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-22 00:25:59,431 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-22 00:25:59,431 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-22 00:25:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:25:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 00:25:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-22 00:25:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-22 00:25:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-22 00:25:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-22 00:25:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-22 00:25:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-22 00:25:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-22 00:25:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-22 00:25:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-22 00:25:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-22 00:25:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-22 00:25:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-22 00:25:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-22 00:25:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-22 00:25:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-22 00:25:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-22 00:25:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-22 00:25:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-22 00:25:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-22 00:25:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 00:25:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-22 00:25:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-22 00:25:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-22 00:25:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-22 00:25:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-22 00:25:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-22 00:25:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-22 00:25:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-22 00:25:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-22 00:25:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-22 00:25:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-22 00:25:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:25:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-22 00:25:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 00:25:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 00:25:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-22 00:25:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 00:25:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 00:25:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 00:25:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 00:25:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-22 00:25:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 00:25:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-22 00:25:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-22 00:25:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 00:25:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-22 00:25:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-22 00:25:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-22 00:25:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-22 00:25:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:25:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 00:25:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:26:00,512 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:26:00,512 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-22 00:26:00,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:26:00 BoogieIcfgContainer [2020-08-22 00:26:00,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:26:00,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:26:00,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:26:00,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:26:00,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:25:58" (1/3) ... [2020-08-22 00:26:00,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734527b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:26:00, skipping insertion in model container [2020-08-22 00:26:00,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:25:59" (2/3) ... [2020-08-22 00:26:00,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734527b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:26:00, skipping insertion in model container [2020-08-22 00:26:00,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:26:00" (3/3) ... [2020-08-22 00:26:00,527 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product24.cil.c [2020-08-22 00:26:00,538 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:26:00,546 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 00:26:00,558 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 00:26:00,580 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:26:00,580 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:26:00,581 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:26:00,581 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:26:00,581 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:26:00,581 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:26:00,581 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:26:00,581 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:26:00,602 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states. [2020-08-22 00:26:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 00:26:00,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:26:00,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:26:00,615 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:26:00,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:26:00,624 INFO L82 PathProgramCache]: Analyzing trace with hash -586231627, now seen corresponding path program 1 times [2020-08-22 00:26:00,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:26:00,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245978840] [2020-08-22 00:26:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:26:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:01,293 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 00:26:01,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:26:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:01,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:26:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:01,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 00:26:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:01,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:26:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:01,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 00:26:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:01,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 00:26:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:01,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 00:26:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:01,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 00:26:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:26:01,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245978840] [2020-08-22 00:26:01,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:26:01,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:26:01,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758218481] [2020-08-22 00:26:01,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:26:01,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:26:01,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:26:01,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:26:01,442 INFO L87 Difference]: Start difference. First operand 178 states. Second operand 3 states. [2020-08-22 00:26:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:26:02,676 INFO L93 Difference]: Finished difference Result 314 states and 413 transitions. [2020-08-22 00:26:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:26:02,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-22 00:26:02,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:26:02,694 INFO L225 Difference]: With dead ends: 314 [2020-08-22 00:26:02,694 INFO L226 Difference]: Without dead ends: 170 [2020-08-22 00:26:02,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:26:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-08-22 00:26:02,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 135. [2020-08-22 00:26:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-08-22 00:26:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 160 transitions. [2020-08-22 00:26:02,798 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 160 transitions. Word has length 52 [2020-08-22 00:26:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:26:02,799 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 160 transitions. [2020-08-22 00:26:02,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:26:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 160 transitions. [2020-08-22 00:26:02,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 00:26:02,804 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:26:02,804 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] [2020-08-22 00:26:02,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:26:02,805 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:26:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:26:02,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1405243585, now seen corresponding path program 1 times [2020-08-22 00:26:02,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:26:02,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750403673] [2020-08-22 00:26:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:26:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:03,216 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 00:26:03,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:26:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:03,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:26:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:03,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 00:26:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:03,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:26:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:03,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 00:26:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:03,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 00:26:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:03,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 00:26:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:03,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 00:26:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:26:03,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750403673] [2020-08-22 00:26:03,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:26:03,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:26:03,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553515322] [2020-08-22 00:26:03,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:26:03,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:26:03,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:26:03,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:26:03,265 INFO L87 Difference]: Start difference. First operand 135 states and 160 transitions. Second operand 4 states. [2020-08-22 00:26:03,683 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 00:26:04,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:26:04,597 INFO L93 Difference]: Finished difference Result 237 states and 292 transitions. [2020-08-22 00:26:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:26:04,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-22 00:26:04,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:26:04,600 INFO L225 Difference]: With dead ends: 237 [2020-08-22 00:26:04,601 INFO L226 Difference]: Without dead ends: 154 [2020-08-22 00:26:04,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:26:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-22 00:26:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 126. [2020-08-22 00:26:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 00:26:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2020-08-22 00:26:04,642 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 53 [2020-08-22 00:26:04,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:26:04,643 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2020-08-22 00:26:04,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:26:04,643 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2020-08-22 00:26:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 00:26:04,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:26:04,646 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] [2020-08-22 00:26:04,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:26:04,647 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:26:04,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:26:04,647 INFO L82 PathProgramCache]: Analyzing trace with hash 340068721, now seen corresponding path program 1 times [2020-08-22 00:26:04,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:26:04,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671023624] [2020-08-22 00:26:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:26:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:05,015 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 00:26:05,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:26:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:05,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:26:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:05,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 00:26:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:05,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:26:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:05,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 00:26:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:05,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 00:26:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:05,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 00:26:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:05,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 00:26:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:26:05,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671023624] [2020-08-22 00:26:05,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:26:05,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 00:26:05,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799158762] [2020-08-22 00:26:05,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:26:05,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:26:05,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:26:05,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:26:05,111 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand 8 states. [2020-08-22 00:26:05,473 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 00:26:05,819 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 00:26:06,071 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 00:26:06,308 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 00:26:07,041 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 00:26:08,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:26:08,934 INFO L93 Difference]: Finished difference Result 439 states and 548 transitions. [2020-08-22 00:26:08,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 00:26:08,935 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-22 00:26:08,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:26:08,940 INFO L225 Difference]: With dead ends: 439 [2020-08-22 00:26:08,940 INFO L226 Difference]: Without dead ends: 337 [2020-08-22 00:26:08,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:26:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-08-22 00:26:09,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 272. [2020-08-22 00:26:09,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-08-22 00:26:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 331 transitions. [2020-08-22 00:26:09,018 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 331 transitions. Word has length 58 [2020-08-22 00:26:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:26:09,018 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 331 transitions. [2020-08-22 00:26:09,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:26:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 331 transitions. [2020-08-22 00:26:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 00:26:09,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:26:09,022 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] [2020-08-22 00:26:09,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:26:09,023 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:26:09,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:26:09,023 INFO L82 PathProgramCache]: Analyzing trace with hash -805179876, now seen corresponding path program 1 times [2020-08-22 00:26:09,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:26:09,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175694304] [2020-08-22 00:26:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:26:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:09,365 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 00:26:09,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:26:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:09,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:26:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:09,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 00:26:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:09,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:26:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:09,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 00:26:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:09,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 00:26:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:09,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 00:26:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:09,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 00:26:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:09,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 00:26:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:26:09,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175694304] [2020-08-22 00:26:09,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:26:09,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 00:26:09,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929406420] [2020-08-22 00:26:09,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:26:09,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:26:09,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:26:09,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:26:09,466 INFO L87 Difference]: Start difference. First operand 272 states and 331 transitions. Second operand 8 states. [2020-08-22 00:26:09,839 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 00:26:11,166 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 00:26:11,495 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 00:26:11,778 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 00:26:12,052 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 00:26:12,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:26:12,802 INFO L93 Difference]: Finished difference Result 839 states and 1103 transitions. [2020-08-22 00:26:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 00:26:12,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-22 00:26:12,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:26:12,814 INFO L225 Difference]: With dead ends: 839 [2020-08-22 00:26:12,815 INFO L226 Difference]: Without dead ends: 591 [2020-08-22 00:26:12,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:26:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-08-22 00:26:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 521. [2020-08-22 00:26:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-08-22 00:26:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2020-08-22 00:26:12,955 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 63 [2020-08-22 00:26:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:26:12,956 INFO L479 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2020-08-22 00:26:12,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:26:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2020-08-22 00:26:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 00:26:12,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:26:12,967 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] [2020-08-22 00:26:12,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 00:26:12,967 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:26:12,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:26:12,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1401738146, now seen corresponding path program 1 times [2020-08-22 00:26:12,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:26:12,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906842276] [2020-08-22 00:26:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:26:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:13,345 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 00:26:13,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:26:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:13,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:26:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:13,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 00:26:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:13,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:26:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:13,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 00:26:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:13,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 00:26:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:13,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 00:26:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:13,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 00:26:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:13,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 00:26:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:13,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 00:26:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:26:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:26:13,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906842276] [2020-08-22 00:26:13,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:26:13,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 00:26:13,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021373316] [2020-08-22 00:26:13,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 00:26:13,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:26:13,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 00:26:13,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:26:13,527 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand 6 states. [2020-08-22 00:26:13,841 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 00:26:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:26:14,650 INFO L93 Difference]: Finished difference Result 890 states and 1163 transitions. [2020-08-22 00:26:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 00:26:14,650 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-08-22 00:26:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:26:14,656 INFO L225 Difference]: With dead ends: 890 [2020-08-22 00:26:14,656 INFO L226 Difference]: Without dead ends: 393 [2020-08-22 00:26:14,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:26:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-08-22 00:26:14,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 343. [2020-08-22 00:26:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-22 00:26:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 394 transitions. [2020-08-22 00:26:14,741 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 394 transitions. Word has length 67 [2020-08-22 00:26:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:26:14,741 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 394 transitions. [2020-08-22 00:26:14,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 00:26:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 394 transitions. [2020-08-22 00:26:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 00:26:14,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:26:14,743 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] [2020-08-22 00:26:14,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 00:26:14,744 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:26:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:26:14,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1293290686, now seen corresponding path program 1 times [2020-08-22 00:26:14,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:26:14,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408045785] [2020-08-22 00:26:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:26:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 00:26:14,801 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 00:26:14,802 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 00:26:14,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 00:26:14,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 12:26:14 BoogieIcfgContainer [2020-08-22 00:26:14,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 00:26:14,834 INFO L168 Benchmark]: Toolchain (without parser) took 16229.00 ms. Allocated memory was 140.5 MB in the beginning and 477.6 MB in the end (delta: 337.1 MB). Free memory was 101.8 MB in the beginning and 89.5 MB in the end (delta: 12.3 MB). Peak memory consumption was 349.4 MB. Max. memory is 7.1 GB. [2020-08-22 00:26:14,835 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 00:26:14,836 INFO L168 Benchmark]: CACSL2BoogieTranslator took 642.41 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 101.6 MB in the beginning and 173.4 MB in the end (delta: -71.8 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-08-22 00:26:14,837 INFO L168 Benchmark]: Boogie Preprocessor took 88.90 ms. Allocated memory is still 203.9 MB. Free memory was 173.4 MB in the beginning and 169.2 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-08-22 00:26:14,837 INFO L168 Benchmark]: RCFGBuilder took 1179.95 ms. Allocated memory was 203.9 MB in the beginning and 235.9 MB in the end (delta: 32.0 MB). Free memory was 169.2 MB in the beginning and 196.7 MB in the end (delta: -27.5 MB). Peak memory consumption was 83.2 MB. Max. memory is 7.1 GB. [2020-08-22 00:26:14,838 INFO L168 Benchmark]: TraceAbstraction took 14312.56 ms. Allocated memory was 235.9 MB in the beginning and 477.6 MB in the end (delta: 241.7 MB). Free memory was 196.7 MB in the beginning and 89.5 MB in the end (delta: 107.3 MB). Peak memory consumption was 349.0 MB. Max. memory is 7.1 GB. [2020-08-22 00:26:14,842 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 642.41 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 101.6 MB in the beginning and 173.4 MB in the end (delta: -71.8 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.90 ms. Allocated memory is still 203.9 MB. Free memory was 173.4 MB in the beginning and 169.2 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1179.95 ms. Allocated memory was 203.9 MB in the beginning and 235.9 MB in the end (delta: 32.0 MB). Free memory was 169.2 MB in the beginning and 196.7 MB in the end (delta: -27.5 MB). Peak memory consumption was 83.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14312.56 ms. Allocated memory was 235.9 MB in the beginning and 477.6 MB in the end (delta: 241.7 MB). Free memory was 196.7 MB in the beginning and 89.5 MB in the end (delta: 107.3 MB). Peak memory consumption was 349.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 44]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L60] int pumpRunning = 0; [L61] int systemActive = 1; [L369] int cleanupTimeShifts = 4; [L637] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L834] int waterLevel = 1; [L835] int methaneLevelCritical = 0; [L445] int retValue_acc ; [L446] int tmp ; [L450] FCALL select_helpers() [L451] FCALL select_features() [L452] CALL, EXPR valid_product() [L949] int retValue_acc ; [L952] retValue_acc = 1 [L953] return (retValue_acc); [L452] RET, EXPR valid_product() [L452] tmp = valid_product() [L454] COND TRUE \read(tmp) [L456] FCALL setup() [L457] CALL runTest() [L436] CALL test() [L266] int splverifierCounter ; [L267] int tmp ; [L268] int tmp___0 ; [L269] int tmp___1 ; [L270] int tmp___2 ; [L273] splverifierCounter = 0 [L275] COND TRUE 1 [L277] COND TRUE splverifierCounter < 4 [L283] tmp = __VERIFIER_nondet_int() [L285] COND TRUE \read(tmp) [L287] CALL waterRise() [L852] COND TRUE waterLevel < 2 [L853] waterLevel = waterLevel + 1 [L287] RET waterRise() [L293] tmp___0 = __VERIFIER_nondet_int() [L295] COND FALSE !(\read(tmp___0)) [L303] tmp___2 = __VERIFIER_nondet_int() [L305] COND FALSE !(\read(tmp___2)) [L311] tmp___1 = __VERIFIER_nondet_int() [L313] COND TRUE \read(tmp___1) [L315] CALL stopSystem() [L242] COND FALSE !(\read(pumpRunning)) [L249] systemActive = 0 [L315] RET stopSystem() [L322] CALL timeShift() [L68] COND FALSE !(\read(pumpRunning)) [L75] COND FALSE !(\read(systemActive)) [L83] CALL __utac_acc__Specification3_spec__1() [L336] int tmp ; [L337] int tmp___0 ; [L338] int tmp___1 ; [L342] CALL, EXPR isMethaneLevelCritical() [L873] int retValue_acc ; [L876] retValue_acc = methaneLevelCritical [L877] return (retValue_acc); [L342] RET, EXPR isMethaneLevelCritical() [L342] tmp = isMethaneLevelCritical() [L344] COND FALSE !(\read(tmp)) [L348] CALL, EXPR getWaterLevel() [L905] int retValue_acc ; [L908] retValue_acc = waterLevel [L909] return (retValue_acc); [L348] RET, EXPR getWaterLevel() [L348] tmp___0 = getWaterLevel() [L350] COND TRUE tmp___0 == 2 [L352] CALL, EXPR isPumpRunning() [L175] int retValue_acc ; [L178] retValue_acc = pumpRunning [L179] return (retValue_acc); [L352] RET, EXPR isPumpRunning() [L352] tmp___1 = isPumpRunning() [L354] COND FALSE !(\read(tmp___1)) [L358] CALL __automaton_fail() [L44] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 237 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.2s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 592 SDtfs, 897 SDslu, 440 SDs, 0 SdLazy, 2174 SolverSat, 577 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=521occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 5 MinimizatonAttempts, 248 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 360 NumberOfCodeBlocks, 360 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 288 ConstructedInterpolants, 0 QuantifiedInterpolants, 82716 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...