/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:32:24,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:32:24,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:32:24,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:32:24,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:32:24,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:32:24,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:32:24,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:32:24,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:32:24,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:32:24,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:32:24,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:32:24,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:32:24,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:32:24,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:32:24,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:32:24,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:32:24,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:32:24,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:32:24,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:32:24,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:32:24,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:32:24,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:32:24,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:32:24,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 02:32:24,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 02:32:24,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 02:32:24,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 02:32:24,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 02:32:24,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 02:32:24,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 02:32:24,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 02:32:24,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 02:32:24,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 02:32:24,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 02:32:24,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 02:32:24,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 02:32:24,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 02:32:24,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:32:24,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:32:24,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:32:24,411 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 [2020-08-19 02:32:24,434 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:32:24,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:32:24,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:32:24,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:32:24,436 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:32:24,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:32:24,436 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:32:24,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:32:24,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:32:24,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:32:24,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:32:24,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:32:24,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:32:24,438 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:32:24,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:32:24,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:32:24,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:32:24,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:32:24,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:32:24,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:32:24,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:32:24,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:32:24,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:32:24,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:32:24,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:32:24,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:32:24,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:32:24,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:32:24,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:32:24,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:32:24,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:32:24,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:32:24,754 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:32:24,756 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:32:24,757 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:32:24,758 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-08-19 02:32:24,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/350e24c35/5d1377419f9448a196a0a613364a8ff0/FLAG82a65365c [2020-08-19 02:32:25,395 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:32:25,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-08-19 02:32:25,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/350e24c35/5d1377419f9448a196a0a613364a8ff0/FLAG82a65365c [2020-08-19 02:32:25,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/350e24c35/5d1377419f9448a196a0a613364a8ff0 [2020-08-19 02:32:25,677 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:32:25,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:32:25,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:32:25,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:32:25,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:32:25,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:32:25" (1/1) ... [2020-08-19 02:32:25,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bcf94a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:32:25, skipping insertion in model container [2020-08-19 02:32:25,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:32:25" (1/1) ... [2020-08-19 02:32:25,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:32:25,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:32:26,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:32:26,187 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:32:26,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:32:26,337 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:32:26,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:32:26 WrapperNode [2020-08-19 02:32:26,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:32:26,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:32:26,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:32:26,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:32:26,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:32:26" (1/1) ... [2020-08-19 02:32:26,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:32:26" (1/1) ... [2020-08-19 02:32:26,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:32:26" (1/1) ... [2020-08-19 02:32:26,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:32:26" (1/1) ... [2020-08-19 02:32:26,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:32:26" (1/1) ... [2020-08-19 02:32:26,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:32:26" (1/1) ... [2020-08-19 02:32:26,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:32:26" (1/1) ... [2020-08-19 02:32:26,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:32:26,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:32:26,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:32:26,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:32:26,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:32:26" (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 [2020-08-19 02:32:26,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:32:26,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:32:26,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-19 02:32:26,523 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-19 02:32:26,524 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-19 02:32:26,524 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-19 02:32:26,524 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-19 02:32:26,525 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-19 02:32:26,525 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-19 02:32:26,525 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-19 02:32:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-19 02:32:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-19 02:32:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-19 02:32:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-19 02:32:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-19 02:32:26,527 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-19 02:32:26,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-19 02:32:26,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-19 02:32:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-19 02:32:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-19 02:32:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-19 02:32:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-19 02:32:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-19 02:32:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-19 02:32:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-19 02:32:26,529 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-19 02:32:26,530 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-19 02:32:26,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-19 02:32:26,530 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-19 02:32:26,530 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-19 02:32:26,530 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-19 02:32:26,530 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-19 02:32:26,531 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:32:26,531 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-19 02:32:26,531 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-19 02:32:26,531 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-19 02:32:26,531 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-19 02:32:26,531 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-19 02:32:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-19 02:32:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-19 02:32:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-19 02:32:26,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:32:26,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:32:26,534 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-19 02:32:26,535 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-19 02:32:26,535 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-19 02:32:26,535 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-19 02:32:26,535 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-19 02:32:26,535 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-19 02:32:26,536 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-19 02:32:26,536 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-19 02:32:26,536 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-19 02:32:26,536 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-19 02:32:26,536 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-19 02:32:26,537 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-19 02:32:26,537 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-19 02:32:26,537 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-19 02:32:26,537 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-19 02:32:26,537 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-19 02:32:26,537 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-19 02:32:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-19 02:32:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-19 02:32:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-19 02:32:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-19 02:32:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-19 02:32:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-19 02:32:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 02:32:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-19 02:32:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-19 02:32:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-19 02:32:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-19 02:32:26,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-19 02:32:26,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 02:32:26,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 02:32:26,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 02:32:26,541 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-19 02:32:26,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 02:32:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-19 02:32:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-19 02:32:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 02:32:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-19 02:32:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-19 02:32:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-19 02:32:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-19 02:32:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-19 02:32:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-19 02:32:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-19 02:32:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-19 02:32:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-19 02:32:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-19 02:32:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-19 02:32:26,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:32:26,544 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-19 02:32:26,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:32:26,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-19 02:32:26,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:32:27,642 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:32:27,643 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-19 02:32:27,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:32:27 BoogieIcfgContainer [2020-08-19 02:32:27,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:32:27,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:32:27,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:32:27,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:32:27,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:32:25" (1/3) ... [2020-08-19 02:32:27,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd870f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:32:27, skipping insertion in model container [2020-08-19 02:32:27,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:32:26" (2/3) ... [2020-08-19 02:32:27,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd870f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:32:27, skipping insertion in model container [2020-08-19 02:32:27,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:32:27" (3/3) ... [2020-08-19 02:32:27,662 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product51.cil.c [2020-08-19 02:32:27,674 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:32:27,683 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:32:27,699 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:32:27,732 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:32:27,732 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:32:27,733 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:32:27,733 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:32:27,733 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:32:27,734 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:32:27,734 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:32:27,735 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:32:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-08-19 02:32:27,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-19 02:32:27,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:32:27,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:32:27,772 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:32:27,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:32:27,779 INFO L82 PathProgramCache]: Analyzing trace with hash -199381509, now seen corresponding path program 1 times [2020-08-19 02:32:27,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:32:27,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923302323] [2020-08-19 02:32:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:32:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:28,553 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 02:32:28,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:32:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:28,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:32:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:28,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:32:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:28,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:32:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:28,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 02:32:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:28,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 02:32:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:28,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-19 02:32:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:32:28,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923302323] [2020-08-19 02:32:28,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:32:28,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:32:28,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593519471] [2020-08-19 02:32:28,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:32:28,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:32:28,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:32:28,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:32:28,712 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 3 states. [2020-08-19 02:32:29,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:32:29,881 INFO L93 Difference]: Finished difference Result 311 states and 407 transitions. [2020-08-19 02:32:29,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:32:29,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-19 02:32:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:32:29,898 INFO L225 Difference]: With dead ends: 311 [2020-08-19 02:32:29,898 INFO L226 Difference]: Without dead ends: 168 [2020-08-19 02:32:29,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:32:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-19 02:32:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2020-08-19 02:32:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-19 02:32:30,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-08-19 02:32:30,023 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 46 [2020-08-19 02:32:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:32:30,024 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-08-19 02:32:30,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:32:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-08-19 02:32:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-19 02:32:30,036 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:32:30,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:32:30,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:32:30,037 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:32:30,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:32:30,038 INFO L82 PathProgramCache]: Analyzing trace with hash 822116352, now seen corresponding path program 1 times [2020-08-19 02:32:30,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:32:30,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141797571] [2020-08-19 02:32:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:32:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:30,450 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 02:32:30,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:32:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:30,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:32:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:30,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:32:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:30,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:32:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:30,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 02:32:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:30,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 02:32:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:30,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 02:32:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:32:30,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141797571] [2020-08-19 02:32:30,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:32:30,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:32:30,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637222787] [2020-08-19 02:32:30,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:32:30,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:32:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:32:30,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:32:30,532 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 4 states. [2020-08-19 02:32:30,959 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 02:32:31,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:32:31,861 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-08-19 02:32:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:32:31,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-19 02:32:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:32:31,866 INFO L225 Difference]: With dead ends: 238 [2020-08-19 02:32:31,866 INFO L226 Difference]: Without dead ends: 152 [2020-08-19 02:32:31,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:32:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-19 02:32:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2020-08-19 02:32:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-19 02:32:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-08-19 02:32:31,908 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 47 [2020-08-19 02:32:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:32:31,909 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-08-19 02:32:31,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:32:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-08-19 02:32:31,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 02:32:31,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:32:31,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:32:31,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:32:31,911 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:32:31,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:32:31,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1772796698, now seen corresponding path program 1 times [2020-08-19 02:32:31,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:32:31,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778428303] [2020-08-19 02:32:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:32:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:32,264 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 02:32:32,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:32:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:32,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:32:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:32,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:32:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:32,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:32:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:32,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 02:32:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:32,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:32:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:32,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 02:32:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:32:32,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778428303] [2020-08-19 02:32:32,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:32:32,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 02:32:32,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976626092] [2020-08-19 02:32:32,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:32:32,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:32:32,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:32:32,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:32:32,372 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 8 states. [2020-08-19 02:32:32,769 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 02:32:33,095 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 02:32:33,376 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 02:32:33,622 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 02:32:34,401 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 02:32:36,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:32:36,221 INFO L93 Difference]: Finished difference Result 427 states and 530 transitions. [2020-08-19 02:32:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:32:36,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-19 02:32:36,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:32:36,227 INFO L225 Difference]: With dead ends: 427 [2020-08-19 02:32:36,227 INFO L226 Difference]: Without dead ends: 326 [2020-08-19 02:32:36,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:32:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-19 02:32:36,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 268. [2020-08-19 02:32:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-19 02:32:36,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 324 transitions. [2020-08-19 02:32:36,307 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 324 transitions. Word has length 51 [2020-08-19 02:32:36,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:32:36,308 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 324 transitions. [2020-08-19 02:32:36,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:32:36,308 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 324 transitions. [2020-08-19 02:32:36,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 02:32:36,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:32:36,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:32:36,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:32:36,311 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:32:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:32:36,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1539786498, now seen corresponding path program 1 times [2020-08-19 02:32:36,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:32:36,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258743274] [2020-08-19 02:32:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:32:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:36,625 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 02:32:36,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:32:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:36,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:32:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:36,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:32:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:36,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:32:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:36,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 02:32:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:36,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 02:32:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:36,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 02:32:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:36,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 02:32:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:32:36,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258743274] [2020-08-19 02:32:36,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:32:36,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 02:32:36,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711689080] [2020-08-19 02:32:36,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:32:36,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:32:36,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:32:36,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:32:36,747 INFO L87 Difference]: Start difference. First operand 268 states and 324 transitions. Second operand 8 states. [2020-08-19 02:32:37,109 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 02:32:38,147 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 02:32:38,476 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 02:32:38,752 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 02:32:39,054 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 02:32:39,509 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 02:32:40,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:32:40,357 INFO L93 Difference]: Finished difference Result 862 states and 1117 transitions. [2020-08-19 02:32:40,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 02:32:40,358 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-19 02:32:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:32:40,364 INFO L225 Difference]: With dead ends: 862 [2020-08-19 02:32:40,364 INFO L226 Difference]: Without dead ends: 618 [2020-08-19 02:32:40,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:32:40,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-19 02:32:40,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 491. [2020-08-19 02:32:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-08-19 02:32:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 598 transitions. [2020-08-19 02:32:40,511 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 598 transitions. Word has length 57 [2020-08-19 02:32:40,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:32:40,512 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 598 transitions. [2020-08-19 02:32:40,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:32:40,512 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 598 transitions. [2020-08-19 02:32:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 02:32:40,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:32:40,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:32:40,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:32:40,516 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:32:40,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:32:40,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1493126654, now seen corresponding path program 1 times [2020-08-19 02:32:40,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:32:40,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275604281] [2020-08-19 02:32:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:32:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:40,850 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 02:32:40,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:32:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:40,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:32:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:40,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:32:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:40,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:32:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:40,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 02:32:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:40,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 02:32:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:40,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:32:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:40,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 02:32:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:40,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 02:32:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:32:40,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275604281] [2020-08-19 02:32:40,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:32:40,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 02:32:40,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854092423] [2020-08-19 02:32:40,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:32:40,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:32:40,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:32:40,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:32:40,962 INFO L87 Difference]: Start difference. First operand 491 states and 598 transitions. Second operand 9 states. [2020-08-19 02:32:41,307 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 02:32:42,276 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 02:32:42,557 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 02:32:42,820 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 02:32:43,314 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 02:32:43,602 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 02:32:44,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:32:44,422 INFO L93 Difference]: Finished difference Result 1371 states and 1840 transitions. [2020-08-19 02:32:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 02:32:44,423 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-19 02:32:44,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:32:44,430 INFO L225 Difference]: With dead ends: 1371 [2020-08-19 02:32:44,431 INFO L226 Difference]: Without dead ends: 904 [2020-08-19 02:32:44,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-19 02:32:44,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-08-19 02:32:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 723. [2020-08-19 02:32:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2020-08-19 02:32:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 891 transitions. [2020-08-19 02:32:44,571 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 891 transitions. Word has length 61 [2020-08-19 02:32:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:32:44,572 INFO L479 AbstractCegarLoop]: Abstraction has 723 states and 891 transitions. [2020-08-19 02:32:44,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:32:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 891 transitions. [2020-08-19 02:32:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 02:32:44,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:32:44,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:32:44,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:32:44,575 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:32:44,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:32:44,576 INFO L82 PathProgramCache]: Analyzing trace with hash 807556796, now seen corresponding path program 1 times [2020-08-19 02:32:44,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:32:44,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283103966] [2020-08-19 02:32:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:32:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,815 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 02:32:44,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:32:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:32:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:32:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:32:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 02:32:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 02:32:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 02:32:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:32:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:32:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:32:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 02:32:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 02:32:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 02:32:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:32:44,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283103966] [2020-08-19 02:32:44,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:32:44,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 02:32:44,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923882163] [2020-08-19 02:32:44,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:32:44,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:32:44,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:32:44,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:32:44,946 INFO L87 Difference]: Start difference. First operand 723 states and 891 transitions. Second operand 9 states. [2020-08-19 02:32:45,984 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 02:32:46,232 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-19 02:32:46,501 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 02:32:46,749 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 02:32:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:32:47,785 INFO L93 Difference]: Finished difference Result 1679 states and 2233 transitions. [2020-08-19 02:32:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:32:47,786 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-08-19 02:32:47,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:32:47,798 INFO L225 Difference]: With dead ends: 1679 [2020-08-19 02:32:47,799 INFO L226 Difference]: Without dead ends: 980 [2020-08-19 02:32:47,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:32:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-08-19 02:32:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 749. [2020-08-19 02:32:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-08-19 02:32:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 919 transitions. [2020-08-19 02:32:47,999 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 919 transitions. Word has length 83 [2020-08-19 02:32:48,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:32:48,001 INFO L479 AbstractCegarLoop]: Abstraction has 749 states and 919 transitions. [2020-08-19 02:32:48,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:32:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 919 transitions. [2020-08-19 02:32:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 02:32:48,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:32:48,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:32:48,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:32:48,006 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:32:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:32:48,007 INFO L82 PathProgramCache]: Analyzing trace with hash 830189050, now seen corresponding path program 1 times [2020-08-19 02:32:48,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:32:48,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90792687] [2020-08-19 02:32:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:32:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,283 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 02:32:48,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:32:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:32:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:32:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:32:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 02:32:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 02:32:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 02:32:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:32:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:32:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:32:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 02:32:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 02:32:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 02:32:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:32:48,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90792687] [2020-08-19 02:32:48,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:32:48,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-19 02:32:48,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219608367] [2020-08-19 02:32:48,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:32:48,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:32:48,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:32:48,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:32:48,418 INFO L87 Difference]: Start difference. First operand 749 states and 919 transitions. Second operand 11 states. [2020-08-19 02:32:48,906 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 02:32:49,139 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 02:32:49,356 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 02:32:50,034 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 02:32:50,315 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 02:32:50,560 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 02:32:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:32:51,773 INFO L93 Difference]: Finished difference Result 1733 states and 2344 transitions. [2020-08-19 02:32:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 02:32:51,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-19 02:32:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:32:51,784 INFO L225 Difference]: With dead ends: 1733 [2020-08-19 02:32:51,784 INFO L226 Difference]: Without dead ends: 1008 [2020-08-19 02:32:51,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-19 02:32:51,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-08-19 02:32:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 765. [2020-08-19 02:32:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-08-19 02:32:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 935 transitions. [2020-08-19 02:32:51,931 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 935 transitions. Word has length 83 [2020-08-19 02:32:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:32:51,932 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 935 transitions. [2020-08-19 02:32:51,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:32:51,932 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 935 transitions. [2020-08-19 02:32:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 02:32:51,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:32:51,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:32:51,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:32:51,935 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:32:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:32:51,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1855681049, now seen corresponding path program 1 times [2020-08-19 02:32:51,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:32:51,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800753748] [2020-08-19 02:32:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:32:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,231 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 02:32:52,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:32:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:32:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:32:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:32:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 02:32:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 02:32:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 02:32:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:32:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:32:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:32:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 02:32:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 02:32:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 02:32:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:32:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:32:52,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800753748] [2020-08-19 02:32:52,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:32:52,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 02:32:52,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093165190] [2020-08-19 02:32:52,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:32:52,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:32:52,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:32:52,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:32:52,412 INFO L87 Difference]: Start difference. First operand 765 states and 935 transitions. Second operand 7 states. [2020-08-19 02:32:52,841 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 02:32:53,331 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 02:32:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:32:55,894 INFO L93 Difference]: Finished difference Result 2622 states and 3569 transitions. [2020-08-19 02:32:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 02:32:55,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-08-19 02:32:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:32:55,907 INFO L225 Difference]: With dead ends: 2622 [2020-08-19 02:32:55,908 INFO L226 Difference]: Without dead ends: 1881 [2020-08-19 02:32:55,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:32:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-08-19 02:32:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1579. [2020-08-19 02:32:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-08-19 02:32:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 1949 transitions. [2020-08-19 02:32:56,236 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 1949 transitions. Word has length 83 [2020-08-19 02:32:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:32:56,236 INFO L479 AbstractCegarLoop]: Abstraction has 1579 states and 1949 transitions. [2020-08-19 02:32:56,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:32:56,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 1949 transitions. [2020-08-19 02:32:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-19 02:32:56,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:32:56,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:32:56,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:32:56,240 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:32:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:32:56,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1308897473, now seen corresponding path program 1 times [2020-08-19 02:32:56,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:32:56,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102115635] [2020-08-19 02:32:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:32:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 02:32:56,304 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 02:32:56,305 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 02:32:56,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:32:56,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:32:56 BoogieIcfgContainer [2020-08-19 02:32:56,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:32:56,349 INFO L168 Benchmark]: Toolchain (without parser) took 30670.53 ms. Allocated memory was 140.0 MB in the beginning and 633.9 MB in the end (delta: 493.9 MB). Free memory was 101.3 MB in the beginning and 156.8 MB in the end (delta: -55.5 MB). Peak memory consumption was 438.4 MB. Max. memory is 7.1 GB. [2020-08-19 02:32:56,350 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 02:32:56,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 658.84 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.1 MB in the beginning and 169.0 MB in the end (delta: -67.9 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-08-19 02:32:56,357 INFO L168 Benchmark]: Boogie Preprocessor took 102.44 ms. Allocated memory is still 203.4 MB. Free memory was 169.0 MB in the beginning and 164.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. [2020-08-19 02:32:56,362 INFO L168 Benchmark]: RCFGBuilder took 1211.16 ms. Allocated memory was 203.4 MB in the beginning and 236.5 MB in the end (delta: 33.0 MB). Free memory was 164.3 MB in the beginning and 192.7 MB in the end (delta: -28.4 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB. [2020-08-19 02:32:56,363 INFO L168 Benchmark]: TraceAbstraction took 28693.70 ms. Allocated memory was 236.5 MB in the beginning and 633.9 MB in the end (delta: 397.4 MB). Free memory was 192.7 MB in the beginning and 156.8 MB in the end (delta: 35.9 MB). Peak memory consumption was 433.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:32:56,371 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 140.0 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 658.84 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.1 MB in the beginning and 169.0 MB in the end (delta: -67.9 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.44 ms. Allocated memory is still 203.4 MB. Free memory was 169.0 MB in the beginning and 164.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1211.16 ms. Allocated memory was 203.4 MB in the beginning and 236.5 MB in the end (delta: 33.0 MB). Free memory was 164.3 MB in the beginning and 192.7 MB in the end (delta: -28.4 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28693.70 ms. Allocated memory was 236.5 MB in the beginning and 633.9 MB in the end (delta: 397.4 MB). Free memory was 192.7 MB in the beginning and 156.8 MB in the end (delta: 35.9 MB). Peak memory consumption was 433.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 704]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L121] int pumpRunning = 0; [L122] int systemActive = 1; [L503] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L773] int cleanupTimeShifts = 4; [L870] int waterLevel = 1; [L871] int methaneLevelCritical = 0; [L846] int retValue_acc ; [L847] int tmp ; [L851] FCALL select_helpers() [L852] FCALL select_features() [L853] CALL, EXPR valid_product() [L738] int retValue_acc ; [L741] retValue_acc = 1 [L742] return (retValue_acc); [L853] RET, EXPR valid_product() [L853] tmp = valid_product() [L855] COND TRUE \read(tmp) [L857] FCALL setup() [L858] CALL runTest() [L840] CALL test() [L46] int splverifierCounter ; [L47] int tmp ; [L48] int tmp___0 ; [L49] int tmp___1 ; [L50] int tmp___2 ; [L53] splverifierCounter = 0 [L55] COND TRUE 1 [L57] COND TRUE splverifierCounter < 4 [L63] tmp = __VERIFIER_nondet_int() [L65] COND TRUE \read(tmp) [L67] CALL waterRise() [L888] COND TRUE waterLevel < 2 [L889] waterLevel = waterLevel + 1 [L67] RET waterRise() [L73] tmp___0 = __VERIFIER_nondet_int() [L75] COND TRUE \read(tmp___0) [L77] CALL changeMethaneLevel() [L900] COND FALSE !(\read(methaneLevelCritical)) [L903] methaneLevelCritical = 1 [L77] RET changeMethaneLevel() [L83] tmp___2 = __VERIFIER_nondet_int() [L85] COND TRUE \read(tmp___2) [L100] CALL timeShift() [L129] COND FALSE !(\read(pumpRunning)) [L136] COND TRUE \read(systemActive) [L138] CALL processEnvironment() [L184] int tmp ; [L187] COND FALSE !(\read(pumpRunning)) [L202] CALL processEnvironment__wrappee__highWaterSensor() [L158] int tmp ; [L161] COND TRUE ! pumpRunning [L163] CALL, EXPR isHighWaterLevel() [L281] int retValue_acc ; [L282] int tmp ; [L283] int tmp___0 ; [L287] CALL, EXPR isHighWaterSensorDry() [L950] int retValue_acc ; [L953] COND FALSE !(waterLevel < 2) [L957] retValue_acc = 0 [L958] return (retValue_acc); [L287] RET, EXPR isHighWaterSensorDry() [L287] tmp = isHighWaterSensorDry() [L289] COND FALSE !(\read(tmp)) [L292] tmp___0 = 1 [L294] retValue_acc = tmp___0 [L295] return (retValue_acc); [L163] RET, EXPR isHighWaterLevel() [L163] tmp = isHighWaterLevel() [L165] COND TRUE \read(tmp) [L167] CALL activatePump() [L212] pumpRunning = 1 [L167] RET activatePump() [L202] RET processEnvironment__wrappee__highWaterSensor() [L138] RET processEnvironment() [L144] CALL __utac_acc__Specification1_spec__1() [L748] int tmp ; [L749] int tmp___0 ; [L753] CALL, EXPR isMethaneLevelCritical() [L909] int retValue_acc ; [L912] retValue_acc = methaneLevelCritical [L913] return (retValue_acc); [L753] RET, EXPR isMethaneLevelCritical() [L753] tmp = isMethaneLevelCritical() [L755] COND TRUE \read(tmp) [L757] CALL, EXPR isPumpRunning() [L236] int retValue_acc ; [L239] retValue_acc = pumpRunning [L240] return (retValue_acc); [L757] RET, EXPR isPumpRunning() [L757] tmp___0 = isPumpRunning() [L759] COND TRUE \read(tmp___0) [L761] CALL __automaton_fail() [L704] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 241 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.5s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 23.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 989 SDtfs, 1945 SDslu, 1030 SDs, 0 SdLazy, 5149 SolverSat, 1209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1579occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 1203 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 598 NumberOfCodeBlocks, 598 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 150744 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...