/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product28.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:13:05,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:13:05,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:13:05,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:13:05,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:13:05,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:13:05,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:13:05,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:13:05,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:13:05,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:13:05,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:13:05,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:13:05,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:13:05,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:13:05,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:13:05,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:13:05,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:13:05,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:13:05,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:13:05,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:13:05,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:13:05,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:13:05,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:13:05,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:13:05,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 04:13:05,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 04:13:05,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 04:13:05,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 04:13:05,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 04:13:05,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 04:13:05,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 04:13:05,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 04:13:05,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 04:13:05,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 04:13:05,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 04:13:05,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 04:13:05,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 04:13:05,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 04:13:05,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:13:05,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:13:05,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:13:05,439 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 04:13:05,461 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:13:05,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:13:05,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:13:05,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:13:05,463 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:13:05,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:13:05,463 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:13:05,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:13:05,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:13:05,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:13:05,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:13:05,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:13:05,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:13:05,465 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:13:05,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:13:05,465 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:13:05,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:13:05,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:13:05,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:13:05,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:13:05,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:13:05,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:13:05,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:13:05,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:13:05,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:13:05,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:13:05,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:13:05,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:13:05,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:13:05,468 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=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:13:05,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:13:05,795 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:13:05,799 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:13:05,800 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:13:05,801 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:13:05,802 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product28.cil.c [2020-08-19 04:13:05,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/491265d1e/7f0fccc4ceb7413bb3bf7e5f40ee874a/FLAGcfa94df0a [2020-08-19 04:13:06,383 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:13:06,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product28.cil.c [2020-08-19 04:13:06,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/491265d1e/7f0fccc4ceb7413bb3bf7e5f40ee874a/FLAGcfa94df0a [2020-08-19 04:13:06,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/491265d1e/7f0fccc4ceb7413bb3bf7e5f40ee874a [2020-08-19 04:13:06,674 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:13:06,675 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:13:06,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:13:06,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:13:06,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:13:06,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:13:06" (1/1) ... [2020-08-19 04:13:06,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a45b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:13:06, skipping insertion in model container [2020-08-19 04:13:06,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:13:06" (1/1) ... [2020-08-19 04:13:06,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:13:06,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:13:07,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:13:07,214 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:13:07,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:13:07,364 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:13:07,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:13:07 WrapperNode [2020-08-19 04:13:07,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:13:07,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:13:07,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:13:07,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:13:07,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:13:07" (1/1) ... [2020-08-19 04:13:07,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:13:07" (1/1) ... [2020-08-19 04:13:07,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:13:07" (1/1) ... [2020-08-19 04:13:07,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:13:07" (1/1) ... [2020-08-19 04:13:07,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:13:07" (1/1) ... [2020-08-19 04:13:07,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:13:07" (1/1) ... [2020-08-19 04:13:07,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:13:07" (1/1) ... [2020-08-19 04:13:07,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:13:07,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:13:07,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:13:07,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:13:07,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:13:07" (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 04:13:07,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:13:07,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:13:07,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-19 04:13:07,609 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-19 04:13:07,610 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-19 04:13:07,610 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-19 04:13:07,610 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-19 04:13:07,610 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-19 04:13:07,611 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-19 04:13:07,612 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-19 04:13:07,612 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-19 04:13:07,612 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-19 04:13:07,612 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-19 04:13:07,613 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-19 04:13:07,613 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-19 04:13:07,614 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-19 04:13:07,614 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-19 04:13:07,615 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-19 04:13:07,615 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-19 04:13:07,615 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-19 04:13:07,615 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-19 04:13:07,616 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-19 04:13:07,616 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-19 04:13:07,616 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-19 04:13:07,616 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-19 04:13:07,617 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-19 04:13:07,617 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-19 04:13:07,618 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-19 04:13:07,618 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-19 04:13:07,618 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-19 04:13:07,618 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-19 04:13:07,618 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:13:07,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-19 04:13:07,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-19 04:13:07,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-19 04:13:07,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-19 04:13:07,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-19 04:13:07,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-19 04:13:07,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-19 04:13:07,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-19 04:13:07,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:13:07,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 04:13:07,620 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-19 04:13:07,621 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-19 04:13:07,621 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-19 04:13:07,621 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-19 04:13:07,621 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-19 04:13:07,621 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-19 04:13:07,621 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-19 04:13:07,621 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-19 04:13:07,622 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-19 04:13:07,622 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-19 04:13:07,622 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-19 04:13:07,622 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-19 04:13:07,622 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-19 04:13:07,623 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-19 04:13:07,623 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-19 04:13:07,623 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-19 04:13:07,623 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-19 04:13:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-19 04:13:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-19 04:13:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-19 04:13:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-19 04:13:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-19 04:13:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 04:13:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-19 04:13:07,625 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-19 04:13:07,625 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-19 04:13:07,625 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-19 04:13:07,625 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-19 04:13:07,625 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-19 04:13:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-19 04:13:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-19 04:13:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:13:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-19 04:13:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-19 04:13:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-19 04:13:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-19 04:13:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-19 04:13:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-19 04:13:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 04:13:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 04:13:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 04:13:07,630 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-19 04:13:07,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 04:13:07,631 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-19 04:13:07,631 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-19 04:13:07,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 04:13:07,631 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-19 04:13:07,631 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-19 04:13:07,631 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-19 04:13:07,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:13:07,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-19 04:13:07,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:13:08,669 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:13:08,670 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-19 04:13:08,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:13:08 BoogieIcfgContainer [2020-08-19 04:13:08,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:13:08,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:13:08,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:13:08,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:13:08,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:13:06" (1/3) ... [2020-08-19 04:13:08,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1f020b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:13:08, skipping insertion in model container [2020-08-19 04:13:08,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:13:07" (2/3) ... [2020-08-19 04:13:08,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1f020b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:13:08, skipping insertion in model container [2020-08-19 04:13:08,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:13:08" (3/3) ... [2020-08-19 04:13:08,684 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product28.cil.c [2020-08-19 04:13:08,695 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:13:08,703 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:13:08,719 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:13:08,744 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:13:08,745 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:13:08,745 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:13:08,745 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:13:08,745 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:13:08,745 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:13:08,745 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:13:08,745 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:13:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states. [2020-08-19 04:13:08,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 04:13:08,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:13:08,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:13:08,780 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:13:08,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:13:08,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1443511359, now seen corresponding path program 1 times [2020-08-19 04:13:08,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:13:08,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574591480] [2020-08-19 04:13:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:13:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:09,463 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 04:13:09,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:13:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:09,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:13:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:09,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 04:13:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:09,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:13:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:09,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 04:13:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:09,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 04:13:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:09,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-19 04:13:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:09,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-19 04:13:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:09,581 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 04:13:09,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574591480] [2020-08-19 04:13:09,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:13:09,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:13:09,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452354276] [2020-08-19 04:13:09,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:13:09,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:13:09,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:13:09,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:13:09,612 INFO L87 Difference]: Start difference. First operand 174 states. Second operand 3 states. [2020-08-19 04:13:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:13:10,785 INFO L93 Difference]: Finished difference Result 282 states and 370 transitions. [2020-08-19 04:13:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:13:10,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-19 04:13:10,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:13:10,804 INFO L225 Difference]: With dead ends: 282 [2020-08-19 04:13:10,804 INFO L226 Difference]: Without dead ends: 153 [2020-08-19 04:13:10,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 04:13:10,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-08-19 04:13:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2020-08-19 04:13:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-19 04:13:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2020-08-19 04:13:10,913 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 52 [2020-08-19 04:13:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:13:10,914 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2020-08-19 04:13:10,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:13:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2020-08-19 04:13:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 04:13:10,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:13:10,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:13:10,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:13:10,919 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:13:10,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:13:10,919 INFO L82 PathProgramCache]: Analyzing trace with hash 880615085, now seen corresponding path program 1 times [2020-08-19 04:13:10,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:13:10,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52029009] [2020-08-19 04:13:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:13:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:11,266 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 04:13:11,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:13:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:11,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:13:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:11,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 04:13:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:11,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:13:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:11,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 04:13:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:11,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 04:13:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:11,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 04:13:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:11,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 04:13:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:11,311 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 04:13:11,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52029009] [2020-08-19 04:13:11,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:13:11,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 04:13:11,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075350916] [2020-08-19 04:13:11,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 04:13:11,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:13:11,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 04:13:11,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 04:13:11,315 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand 4 states. [2020-08-19 04:13:11,737 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 04:13:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:13:12,454 INFO L93 Difference]: Finished difference Result 205 states and 249 transitions. [2020-08-19 04:13:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:13:12,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-19 04:13:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:13:12,458 INFO L225 Difference]: With dead ends: 205 [2020-08-19 04:13:12,458 INFO L226 Difference]: Without dead ends: 137 [2020-08-19 04:13:12,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:13:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-19 04:13:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2020-08-19 04:13:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-19 04:13:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2020-08-19 04:13:12,496 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 53 [2020-08-19 04:13:12,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:13:12,497 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2020-08-19 04:13:12,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 04:13:12,497 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2020-08-19 04:13:12,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 04:13:12,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:13:12,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:13:12,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:13:12,500 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:13:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:13:12,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1617309652, now seen corresponding path program 1 times [2020-08-19 04:13:12,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:13:12,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306711941] [2020-08-19 04:13:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:13:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:12,851 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 04:13:12,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:13:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:12,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:13:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:12,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 04:13:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:12,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:13:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:12,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 04:13:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:12,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-19 04:13:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:12,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-19 04:13:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:12,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-19 04:13:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:12,974 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 04:13:12,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306711941] [2020-08-19 04:13:12,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:13:12,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 04:13:12,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462481354] [2020-08-19 04:13:12,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:13:12,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:13:12,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:13:12,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:13:12,977 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand 8 states. [2020-08-19 04:13:13,309 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 04:13:13,598 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 04:13:13,861 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 04:13:14,133 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 04:13:14,888 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 04:13:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:13:16,557 INFO L93 Difference]: Finished difference Result 390 states and 482 transitions. [2020-08-19 04:13:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:13:16,558 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-19 04:13:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:13:16,563 INFO L225 Difference]: With dead ends: 390 [2020-08-19 04:13:16,564 INFO L226 Difference]: Without dead ends: 303 [2020-08-19 04:13:16,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:13:16,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-08-19 04:13:16,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 242. [2020-08-19 04:13:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-19 04:13:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 291 transitions. [2020-08-19 04:13:16,629 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 291 transitions. Word has length 58 [2020-08-19 04:13:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:13:16,630 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 291 transitions. [2020-08-19 04:13:16,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:13:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 291 transitions. [2020-08-19 04:13:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-19 04:13:16,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:13:16,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:13:16,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:13:16,633 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:13:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:13:16,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1904985657, now seen corresponding path program 1 times [2020-08-19 04:13:16,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:13:16,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146039946] [2020-08-19 04:13:16,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:13:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:16,984 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 04:13:16,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:13:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:17,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:13:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:17,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 04:13:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:17,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:13:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:17,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 04:13:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:17,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 04:13:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:17,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 04:13:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:17,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 04:13:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:17,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 04:13:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:17,067 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 04:13:17,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146039946] [2020-08-19 04:13:17,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:13:17,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 04:13:17,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175421732] [2020-08-19 04:13:17,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:13:17,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:13:17,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:13:17,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:13:17,070 INFO L87 Difference]: Start difference. First operand 242 states and 291 transitions. Second operand 8 states. [2020-08-19 04:13:17,466 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 04:13:18,703 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 04:13:19,031 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 04:13:19,280 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 04:13:19,561 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 04:13:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:13:20,191 INFO L93 Difference]: Finished difference Result 741 states and 971 transitions. [2020-08-19 04:13:20,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:13:20,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-19 04:13:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:13:20,198 INFO L225 Difference]: With dead ends: 741 [2020-08-19 04:13:20,199 INFO L226 Difference]: Without dead ends: 523 [2020-08-19 04:13:20,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:13:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-08-19 04:13:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 457. [2020-08-19 04:13:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-08-19 04:13:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 563 transitions. [2020-08-19 04:13:20,319 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 563 transitions. Word has length 63 [2020-08-19 04:13:20,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:13:20,320 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 563 transitions. [2020-08-19 04:13:20,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:13:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 563 transitions. [2020-08-19 04:13:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 04:13:20,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:13:20,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:13:20,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:13:20,326 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:13:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:13:20,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1824895917, now seen corresponding path program 1 times [2020-08-19 04:13:20,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:13:20,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954371325] [2020-08-19 04:13:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:13:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:20,595 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 04:13:20,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:13:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:20,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:13:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:20,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 04:13:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:20,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:13:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:20,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 04:13:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:20,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 04:13:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:20,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 04:13:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:20,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 04:13:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:20,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 04:13:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:20,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 04:13:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:13:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:13:20,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954371325] [2020-08-19 04:13:20,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:13:20,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 04:13:20,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507117053] [2020-08-19 04:13:20,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:13:20,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:13:20,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:13:20,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:13:20,720 INFO L87 Difference]: Start difference. First operand 457 states and 563 transitions. Second operand 6 states. [2020-08-19 04:13:21,009 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 04:13:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:13:21,750 INFO L93 Difference]: Finished difference Result 806 states and 1047 transitions. [2020-08-19 04:13:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 04:13:21,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-08-19 04:13:21,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:13:21,756 INFO L225 Difference]: With dead ends: 806 [2020-08-19 04:13:21,756 INFO L226 Difference]: Without dead ends: 373 [2020-08-19 04:13:21,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:13:21,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-08-19 04:13:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 323. [2020-08-19 04:13:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-19 04:13:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 374 transitions. [2020-08-19 04:13:21,823 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 374 transitions. Word has length 67 [2020-08-19 04:13:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:13:21,824 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 374 transitions. [2020-08-19 04:13:21,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:13:21,824 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 374 transitions. [2020-08-19 04:13:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 04:13:21,826 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:13:21,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:13:21,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:13:21,827 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:13:21,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:13:21,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2047531853, now seen corresponding path program 1 times [2020-08-19 04:13:21,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:13:21,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870470185] [2020-08-19 04:13:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:13:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 04:13:21,886 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 04:13:21,886 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 04:13:21,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:13:21,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:13:21 BoogieIcfgContainer [2020-08-19 04:13:21,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:13:21,914 INFO L168 Benchmark]: Toolchain (without parser) took 15238.99 ms. Allocated memory was 146.8 MB in the beginning and 461.4 MB in the end (delta: 314.6 MB). Free memory was 102.1 MB in the beginning and 300.4 MB in the end (delta: -198.3 MB). Peak memory consumption was 116.3 MB. Max. memory is 7.1 GB. [2020-08-19 04:13:21,915 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 04:13:21,916 INFO L168 Benchmark]: CACSL2BoogieTranslator took 688.57 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 101.9 MB in the beginning and 173.1 MB in the end (delta: -71.3 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2020-08-19 04:13:21,917 INFO L168 Benchmark]: Boogie Preprocessor took 141.12 ms. Allocated memory is still 203.9 MB. Free memory was 173.1 MB in the beginning and 168.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-19 04:13:21,918 INFO L168 Benchmark]: RCFGBuilder took 1168.45 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 168.9 MB in the beginning and 199.8 MB in the end (delta: -30.9 MB). Peak memory consumption was 85.6 MB. Max. memory is 7.1 GB. [2020-08-19 04:13:21,919 INFO L168 Benchmark]: TraceAbstraction took 13236.32 ms. Allocated memory was 236.5 MB in the beginning and 461.4 MB in the end (delta: 224.9 MB). Free memory was 199.8 MB in the beginning and 300.4 MB in the end (delta: -100.5 MB). Peak memory consumption was 124.4 MB. Max. memory is 7.1 GB. [2020-08-19 04:13:21,922 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 688.57 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 101.9 MB in the beginning and 173.1 MB in the end (delta: -71.3 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.12 ms. Allocated memory is still 203.9 MB. Free memory was 173.1 MB in the beginning and 168.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1168.45 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 168.9 MB in the beginning and 199.8 MB in the end (delta: -30.9 MB). Peak memory consumption was 85.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13236.32 ms. Allocated memory was 236.5 MB in the beginning and 461.4 MB in the end (delta: 224.9 MB). Free memory was 199.8 MB in the beginning and 300.4 MB in the end (delta: -100.5 MB). Peak memory consumption was 124.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 545]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L89] int pumpRunning = 0; [L90] int systemActive = 1; [L356] int waterLevel = 1; [L357] int methaneLevelCritical = 0; [L445] int cleanupTimeShifts = 4; [L753] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L518] int retValue_acc ; [L519] int tmp ; [L523] FCALL select_helpers() [L524] FCALL select_features() [L525] CALL, EXPR valid_product() [L69] int retValue_acc ; [L72] retValue_acc = 1 [L73] return (retValue_acc); [L525] RET, EXPR valid_product() [L525] tmp = valid_product() [L527] COND TRUE \read(tmp) [L529] FCALL setup() [L530] CALL runTest() [L512] CALL test() [L287] int splverifierCounter ; [L288] int tmp ; [L289] int tmp___0 ; [L290] int tmp___1 ; [L291] int tmp___2 ; [L294] splverifierCounter = 0 [L296] COND TRUE 1 [L298] COND TRUE splverifierCounter < 4 [L304] tmp = __VERIFIER_nondet_int() [L306] COND TRUE \read(tmp) [L308] CALL waterRise() [L374] COND TRUE waterLevel < 2 [L375] waterLevel = waterLevel + 1 [L308] RET waterRise() [L314] tmp___0 = __VERIFIER_nondet_int() [L316] COND FALSE !(\read(tmp___0)) [L324] tmp___2 = __VERIFIER_nondet_int() [L326] COND FALSE !(\read(tmp___2)) [L332] tmp___1 = __VERIFIER_nondet_int() [L334] COND TRUE \read(tmp___1) [L336] CALL stopSystem() [L263] COND FALSE !(\read(pumpRunning)) [L270] systemActive = 0 [L336] RET stopSystem() [L343] CALL timeShift() [L97] COND FALSE !(\read(pumpRunning)) [L104] COND FALSE !(\read(systemActive)) [L112] CALL __utac_acc__Specification3_spec__1() [L551] int tmp ; [L552] int tmp___0 ; [L553] int tmp___1 ; [L557] CALL, EXPR isMethaneLevelCritical() [L395] int retValue_acc ; [L398] retValue_acc = methaneLevelCritical [L399] return (retValue_acc); [L557] RET, EXPR isMethaneLevelCritical() [L557] tmp = isMethaneLevelCritical() [L559] COND FALSE !(\read(tmp)) [L563] CALL, EXPR getWaterLevel() [L427] int retValue_acc ; [L430] retValue_acc = waterLevel [L431] return (retValue_acc); [L563] RET, EXPR getWaterLevel() [L563] tmp___0 = getWaterLevel() [L565] COND TRUE tmp___0 == 2 [L567] CALL, EXPR isPumpRunning() [L196] int retValue_acc ; [L199] retValue_acc = pumpRunning [L200] return (retValue_acc); [L567] RET, EXPR isPumpRunning() [L567] tmp___1 = isPumpRunning() [L569] COND FALSE !(\read(tmp___1)) [L573] CALL __automaton_fail() [L545] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 234 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 533 SDtfs, 833 SDslu, 413 SDs, 0 SdLazy, 1915 SolverSat, 543 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=457occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 5 MinimizatonAttempts, 236 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 360 NumberOfCodeBlocks, 360 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 288 ConstructedInterpolants, 0 QuantifiedInterpolants, 82716 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...