/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=WIDEST --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_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:00:22,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:00:22,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:00:22,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:00:22,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:00:22,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:00:22,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:00:22,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:00:22,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:00:22,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:00:22,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:00:22,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:00:22,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:00:22,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:00:22,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:00:22,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:00:22,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:00:22,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:00:22,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:00:22,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:00:22,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:00:22,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:00:22,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:00:22,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:00:22,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:00:22,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:00:22,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:00:22,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:00:22,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:00:22,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:00:22,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:00:22,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:00:22,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:00:22,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:00:22,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:00:22,366 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:00:22,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:00:22,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:00:22,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:00:22,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:00:22,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:00:22,373 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 22:00:22,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:00:22,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:00:22,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:00:22,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:00:22,413 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:00:22,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:00:22,413 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:00:22,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:00:22,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:00:22,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:00:22,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:00:22,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:00:22,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:00:22,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:00:22,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:00:22,416 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:00:22,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:00:22,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:00:22,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:00:22,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:00:22,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:00:22,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:00:22,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:00:22,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:00:22,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:00:22,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:00:22,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:00:22,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:00:22,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:00:22,419 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=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:00:22,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:00:22,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:00:22,754 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:00:22,755 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:00:22,756 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:00:22,757 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product18.cil.c [2020-08-21 22:00:22,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ddcb25741/dab25461f0624662bbd0727535f8ca00/FLAGe4d7752f4 [2020-08-21 22:00:23,420 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:00:23,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product18.cil.c [2020-08-21 22:00:23,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ddcb25741/dab25461f0624662bbd0727535f8ca00/FLAGe4d7752f4 [2020-08-21 22:00:23,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ddcb25741/dab25461f0624662bbd0727535f8ca00 [2020-08-21 22:00:23,667 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:00:23,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:00:23,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:00:23,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:00:23,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:00:23,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:00:23" (1/1) ... [2020-08-21 22:00:23,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1516d3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:23, skipping insertion in model container [2020-08-21 22:00:23,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:00:23" (1/1) ... [2020-08-21 22:00:23,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:00:23,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:00:24,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:00:24,156 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:00:24,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:00:24,292 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:00:24,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:24 WrapperNode [2020-08-21 22:00:24,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:00:24,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:00:24,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:00:24,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:00:24,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:24" (1/1) ... [2020-08-21 22:00:24,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:24" (1/1) ... [2020-08-21 22:00:24,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:24" (1/1) ... [2020-08-21 22:00:24,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:24" (1/1) ... [2020-08-21 22:00:24,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:24" (1/1) ... [2020-08-21 22:00:24,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:24" (1/1) ... [2020-08-21 22:00:24,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:24" (1/1) ... [2020-08-21 22:00:24,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:00:24,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:00:24,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:00:24,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:00:24,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:24" (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 22:00:24,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:00:24,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:00:24,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 22:00:24,459 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 22:00:24,459 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 22:00:24,459 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 22:00:24,459 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 22:00:24,459 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:00:24,459 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 22:00:24,460 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 22:00:24,460 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 22:00:24,460 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 22:00:24,460 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 22:00:24,460 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 22:00:24,460 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 22:00:24,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 22:00:24,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 22:00:24,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 22:00:24,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 22:00:24,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 22:00:24,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 22:00:24,461 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 22:00:24,462 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 22:00:24,462 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 22:00:24,462 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 22:00:24,462 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 22:00:24,462 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 22:00:24,463 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 22:00:24,463 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 22:00:24,463 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 22:00:24,463 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 22:00:24,463 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 22:00:24,463 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 22:00:24,463 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 22:00:24,464 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 22:00:24,464 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 22:00:24,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-21 22:00:24,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 22:00:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:00:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:00:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 22:00:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 22:00:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 22:00:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 22:00:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 22:00:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 22:00:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 22:00:24,466 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 22:00:24,466 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 22:00:24,466 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 22:00:24,466 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 22:00:24,466 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 22:00:24,466 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 22:00:24,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:00:24,467 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 22:00:24,467 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 22:00:24,467 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 22:00:24,467 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 22:00:24,467 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 22:00:24,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 22:00:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 22:00:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 22:00:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 22:00:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 22:00:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 22:00:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 22:00:24,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 22:00:24,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 22:00:24,469 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 22:00:24,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 22:00:24,469 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 22:00:24,469 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 22:00:24,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 22:00:24,470 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 22:00:24,470 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 22:00:24,470 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 22:00:24,470 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 22:00:24,470 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 22:00:24,470 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 22:00:24,471 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 22:00:24,471 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-21 22:00:24,471 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 22:00:24,471 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 22:00:24,471 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 22:00:24,471 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 22:00:24,472 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 22:00:24,472 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 22:00:24,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:00:24,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 22:00:24,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:00:25,473 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:00:25,474 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 22:00:25,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:00:25 BoogieIcfgContainer [2020-08-21 22:00:25,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:00:25,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:00:25,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:00:25,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:00:25,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:00:23" (1/3) ... [2020-08-21 22:00:25,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c0e0c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:00:25, skipping insertion in model container [2020-08-21 22:00:25,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:24" (2/3) ... [2020-08-21 22:00:25,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c0e0c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:00:25, skipping insertion in model container [2020-08-21 22:00:25,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:00:25" (3/3) ... [2020-08-21 22:00:25,488 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product18.cil.c [2020-08-21 22:00:25,499 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:00:25,508 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:00:25,521 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:00:25,545 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:00:25,545 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:00:25,545 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:00:25,545 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:00:25,546 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:00:25,546 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:00:25,546 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:00:25,546 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:00:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-08-21 22:00:25,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 22:00:25,577 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:00:25,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:00:25,578 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:00:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:00:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash 144675927, now seen corresponding path program 1 times [2020-08-21 22:00:25,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:00:25,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062380599] [2020-08-21 22:00:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:00:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:26,196 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:00:26,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:00:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:26,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:00:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:26,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:00:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:26,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:00:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:26,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:00:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:26,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 22:00:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:26,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 22:00:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:26,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 22:00:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:26,320 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 22:00:26,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062380599] [2020-08-21 22:00:26,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:00:26,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:00:26,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741988362] [2020-08-21 22:00:26,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:00:26,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:00:26,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:00:26,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:00:26,362 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 3 states. [2020-08-21 22:00:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:00:27,429 INFO L93 Difference]: Finished difference Result 268 states and 351 transitions. [2020-08-21 22:00:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:00:27,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 22:00:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:00:27,446 INFO L225 Difference]: With dead ends: 268 [2020-08-21 22:00:27,446 INFO L226 Difference]: Without dead ends: 145 [2020-08-21 22:00:27,451 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 [2020-08-21 22:00:27,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-08-21 22:00:27,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 114. [2020-08-21 22:00:27,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 22:00:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2020-08-21 22:00:27,569 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 52 [2020-08-21 22:00:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:00:27,570 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2020-08-21 22:00:27,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:00:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2020-08-21 22:00:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 22:00:27,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:00:27,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:00:27,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:00:27,582 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:00:27,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:00:27,582 INFO L82 PathProgramCache]: Analyzing trace with hash -274604967, now seen corresponding path program 1 times [2020-08-21 22:00:27,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:00:27,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043991973] [2020-08-21 22:00:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:00:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:28,000 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:00:28,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:00:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:28,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:00:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:28,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:00:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:28,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:00:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:28,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:00:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:28,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:00:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:28,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 22:00:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:28,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 22:00:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:28,085 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 22:00:28,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043991973] [2020-08-21 22:00:28,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:00:28,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 22:00:28,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33351280] [2020-08-21 22:00:28,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 22:00:28,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:00:28,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 22:00:28,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 22:00:28,090 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 4 states. [2020-08-21 22:00:28,508 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:00:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:00:29,220 INFO L93 Difference]: Finished difference Result 197 states and 238 transitions. [2020-08-21 22:00:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:00:29,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-21 22:00:29,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:00:29,224 INFO L225 Difference]: With dead ends: 197 [2020-08-21 22:00:29,224 INFO L226 Difference]: Without dead ends: 129 [2020-08-21 22:00:29,225 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 [2020-08-21 22:00:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-21 22:00:29,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2020-08-21 22:00:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 22:00:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2020-08-21 22:00:29,261 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 53 [2020-08-21 22:00:29,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:00:29,262 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2020-08-21 22:00:29,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 22:00:29,262 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2020-08-21 22:00:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 22:00:29,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:00:29,264 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] [2020-08-21 22:00:29,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:00:29,265 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:00:29,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:00:29,265 INFO L82 PathProgramCache]: Analyzing trace with hash 245025236, now seen corresponding path program 1 times [2020-08-21 22:00:29,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:00:29,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709147657] [2020-08-21 22:00:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:00:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,576 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:00:29,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:00:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:00:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:00:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:00:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:00:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 22:00:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 22:00:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 22:00:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,687 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 22:00:29,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709147657] [2020-08-21 22:00:29,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:00:29,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:00:29,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892121024] [2020-08-21 22:00:29,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:00:29,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:00:29,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:00:29,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:00:29,694 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand 8 states. [2020-08-21 22:00:30,051 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:00:30,340 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:00:30,603 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:00:30,844 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:00:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:00:31,805 INFO L93 Difference]: Finished difference Result 210 states and 256 transitions. [2020-08-21 22:00:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:00:31,805 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-21 22:00:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:00:31,808 INFO L225 Difference]: With dead ends: 210 [2020-08-21 22:00:31,808 INFO L226 Difference]: Without dead ends: 129 [2020-08-21 22:00:31,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:00:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-21 22:00:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2020-08-21 22:00:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 22:00:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2020-08-21 22:00:31,841 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 58 [2020-08-21 22:00:31,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:00:31,842 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2020-08-21 22:00:31,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:00:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2020-08-21 22:00:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 22:00:31,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:00:31,843 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] [2020-08-21 22:00:31,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:00:31,844 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:00:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:00:31,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1490172925, now seen corresponding path program 1 times [2020-08-21 22:00:31,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:00:31,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149557900] [2020-08-21 22:00:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:00:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,119 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:00:32,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:00:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:00:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:00:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:00:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:00:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 22:00:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:00:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 22:00:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 22:00:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 22:00:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,217 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 22:00:32,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149557900] [2020-08-21 22:00:32,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:00:32,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:00:32,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380133471] [2020-08-21 22:00:32,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:00:32,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:00:32,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:00:32,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:00:32,220 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand 8 states. [2020-08-21 22:00:32,581 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:00:33,851 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:00:34,165 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:00:34,402 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:00:34,641 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:00:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:00:35,202 INFO L93 Difference]: Finished difference Result 314 states and 408 transitions. [2020-08-21 22:00:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:00:35,203 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-21 22:00:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:00:35,207 INFO L225 Difference]: With dead ends: 314 [2020-08-21 22:00:35,207 INFO L226 Difference]: Without dead ends: 233 [2020-08-21 22:00:35,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:00:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-08-21 22:00:35,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 184. [2020-08-21 22:00:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-21 22:00:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2020-08-21 22:00:35,255 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 66 [2020-08-21 22:00:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:00:35,255 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2020-08-21 22:00:35,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:00:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2020-08-21 22:00:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 22:00:35,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:00:35,257 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] [2020-08-21 22:00:35,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:00:35,258 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:00:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:00:35,258 INFO L82 PathProgramCache]: Analyzing trace with hash -123378135, now seen corresponding path program 1 times [2020-08-21 22:00:35,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:00:35,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81000559] [2020-08-21 22:00:35,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:00:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:35,509 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:00:35,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:00:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:35,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:00:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:35,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:00:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:35,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:00:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:35,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:00:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:35,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 22:00:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:35,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 22:00:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:35,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:00:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:35,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 22:00:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:35,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 22:00:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:35,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-21 22:00:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:35,579 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 22:00:35,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81000559] [2020-08-21 22:00:35,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:00:35,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:00:35,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179423448] [2020-08-21 22:00:35,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:00:35,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:00:35,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:00:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:00:35,582 INFO L87 Difference]: Start difference. First operand 184 states and 215 transitions. Second operand 6 states. [2020-08-21 22:00:35,902 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:00:36,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:00:36,485 INFO L93 Difference]: Finished difference Result 306 states and 373 transitions. [2020-08-21 22:00:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:00:36,486 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-08-21 22:00:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:00:36,488 INFO L225 Difference]: With dead ends: 306 [2020-08-21 22:00:36,488 INFO L226 Difference]: Without dead ends: 146 [2020-08-21 22:00:36,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:00:36,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-21 22:00:36,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2020-08-21 22:00:36,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-21 22:00:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 148 transitions. [2020-08-21 22:00:36,529 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 148 transitions. Word has length 70 [2020-08-21 22:00:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:00:36,530 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 148 transitions. [2020-08-21 22:00:36,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:00:36,530 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 148 transitions. [2020-08-21 22:00:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 22:00:36,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:00:36,533 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] [2020-08-21 22:00:36,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:00:36,533 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:00:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:00:36,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2126179389, now seen corresponding path program 1 times [2020-08-21 22:00:36,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:00:36,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90352006] [2020-08-21 22:00:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:00:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 22:00:36,596 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 22:00:36,597 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 22:00:36,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:00:36,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:00:36 BoogieIcfgContainer [2020-08-21 22:00:36,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:00:36,625 INFO L168 Benchmark]: Toolchain (without parser) took 12956.75 ms. Allocated memory was 141.0 MB in the beginning and 459.8 MB in the end (delta: 318.8 MB). Free memory was 102.9 MB in the beginning and 336.2 MB in the end (delta: -233.3 MB). Peak memory consumption was 85.4 MB. Max. memory is 7.1 GB. [2020-08-21 22:00:36,626 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 22:00:36,627 INFO L168 Benchmark]: CACSL2BoogieTranslator took 625.70 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 102.7 MB in the beginning and 171.7 MB in the end (delta: -69.1 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:00:36,628 INFO L168 Benchmark]: Boogie Preprocessor took 92.02 ms. Allocated memory is still 205.0 MB. Free memory was 171.7 MB in the beginning and 166.7 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:00:36,629 INFO L168 Benchmark]: RCFGBuilder took 1092.04 ms. Allocated memory was 205.0 MB in the beginning and 236.5 MB in the end (delta: 31.5 MB). Free memory was 166.7 MB in the beginning and 194.8 MB in the end (delta: -28.0 MB). Peak memory consumption was 79.6 MB. Max. memory is 7.1 GB. [2020-08-21 22:00:36,629 INFO L168 Benchmark]: TraceAbstraction took 11142.35 ms. Allocated memory was 236.5 MB in the beginning and 459.8 MB in the end (delta: 223.3 MB). Free memory was 194.8 MB in the beginning and 336.2 MB in the end (delta: -141.4 MB). Peak memory consumption was 81.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:00:36,633 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 625.70 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 102.7 MB in the beginning and 171.7 MB in the end (delta: -69.1 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 92.02 ms. Allocated memory is still 205.0 MB. Free memory was 171.7 MB in the beginning and 166.7 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1092.04 ms. Allocated memory was 205.0 MB in the beginning and 236.5 MB in the end (delta: 31.5 MB). Free memory was 166.7 MB in the beginning and 194.8 MB in the end (delta: -28.0 MB). Peak memory consumption was 79.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11142.35 ms. Allocated memory was 236.5 MB in the beginning and 459.8 MB in the end (delta: 223.3 MB). Free memory was 194.8 MB in the beginning and 336.2 MB in the end (delta: -141.4 MB). Peak memory consumption was 81.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 910]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L40] int cleanupTimeShifts = 4; [L149] int waterLevel = 1; [L150] int methaneLevelCritical = 0; [L407] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L608] int pumpRunning = 0; [L609] int systemActive = 1; [L121] int retValue_acc ; [L122] int tmp ; [L126] FCALL select_helpers() [L127] FCALL select_features() [L128] CALL, EXPR valid_product() [L862] int retValue_acc ; [L865] retValue_acc = 1 [L866] return (retValue_acc); [L128] RET, EXPR valid_product() [L128] tmp = valid_product() [L130] COND TRUE \read(tmp) [L132] FCALL setup() [L133] CALL runTest() [L112] CALL test() [L770] int splverifierCounter ; [L771] int tmp ; [L772] int tmp___0 ; [L773] int tmp___1 ; [L774] int tmp___2 ; [L777] splverifierCounter = 0 [L779] COND TRUE 1 [L781] COND TRUE splverifierCounter < 4 [L787] tmp = __VERIFIER_nondet_int() [L789] COND TRUE \read(tmp) [L791] CALL waterRise() [L167] COND TRUE waterLevel < 2 [L168] waterLevel = waterLevel + 1 [L791] RET waterRise() [L797] tmp___0 = __VERIFIER_nondet_int() [L799] COND FALSE !(\read(tmp___0)) [L807] tmp___2 = __VERIFIER_nondet_int() [L809] COND FALSE !(\read(tmp___2)) [L815] tmp___1 = __VERIFIER_nondet_int() [L817] COND TRUE \read(tmp___1) [L824] CALL timeShift() [L616] COND FALSE !(\read(pumpRunning)) [L623] COND TRUE \read(systemActive) [L625] CALL processEnvironment() [L645] int tmp ; [L648] COND FALSE !(\read(pumpRunning)) [L663] FCALL processEnvironment__wrappee__base() [L625] RET processEnvironment() [L631] CALL __utac_acc__Specification3_spec__1() [L873] int tmp ; [L874] int tmp___0 ; [L875] int tmp___1 ; [L879] CALL, EXPR isMethaneLevelCritical() [L188] int retValue_acc ; [L191] retValue_acc = methaneLevelCritical [L192] return (retValue_acc); [L879] RET, EXPR isMethaneLevelCritical() [L879] tmp = isMethaneLevelCritical() [L881] COND FALSE !(\read(tmp)) [L885] CALL, EXPR getWaterLevel() [L220] int retValue_acc ; [L223] retValue_acc = waterLevel [L224] return (retValue_acc); [L885] RET, EXPR getWaterLevel() [L885] tmp___0 = getWaterLevel() [L887] COND TRUE tmp___0 == 2 [L889] CALL, EXPR isPumpRunning() [L697] int retValue_acc ; [L700] retValue_acc = pumpRunning [L701] return (retValue_acc); [L889] RET, EXPR isPumpRunning() [L889] tmp___1 = isPumpRunning() [L891] COND FALSE !(\read(tmp___1)) [L895] CALL __automaton_fail() [L910] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 221 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.0s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 465 SDtfs, 633 SDslu, 256 SDs, 0 SdLazy, 1390 SolverSat, 396 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=184occurred 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: 0.2s AutomataMinimizationTime, 5 MinimizatonAttempts, 141 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 369 NumberOfCodeBlocks, 369 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 83938 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...