/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product55.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:43:22,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:43:22,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:43:22,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:43:22,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:43:22,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:43:22,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:43:22,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:43:22,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:43:22,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:43:22,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:43:22,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:43:22,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:43:22,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:43:22,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:43:22,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:43:22,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:43:22,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:43:22,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:43:22,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:43:22,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:43:22,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:43:22,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:43:22,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:43:22,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:43:22,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:43:22,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:43:22,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:43:22,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:43:22,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:43:22,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:43:22,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:43:22,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:43:22,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:43:22,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:43:22,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:43:22,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:43:22,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:43:22,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:43:22,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:43:22,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:43:22,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:43:22,211 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:43:22,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:43:22,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:43:22,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:43:22,213 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:43:22,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:43:22,213 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:43:22,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:43:22,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:43:22,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:43:22,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:43:22,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:43:22,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:43:22,215 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:43:22,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:43:22,215 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:43:22,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:43:22,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:43:22,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:43:22,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:43:22,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:43:22,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:43:22,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:43:22,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:43:22,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:43:22,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:43:22,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:43:22,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:43:22,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:43:22,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:43:22,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:43:22,567 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:43:22,571 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:43:22,574 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:43:22,580 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:43:22,581 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product55.cil.c [2020-08-21 18:43:22,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03d36566d/5b22266d1fa7480598e660254d54c3c1/FLAGb267116b8 [2020-08-21 18:43:23,168 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:43:23,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product55.cil.c [2020-08-21 18:43:23,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03d36566d/5b22266d1fa7480598e660254d54c3c1/FLAGb267116b8 [2020-08-21 18:43:23,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03d36566d/5b22266d1fa7480598e660254d54c3c1 [2020-08-21 18:43:23,509 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:43:23,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:43:23,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:43:23,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:43:23,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:43:23,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:43:23" (1/1) ... [2020-08-21 18:43:23,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43518757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:43:23, skipping insertion in model container [2020-08-21 18:43:23,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:43:23" (1/1) ... [2020-08-21 18:43:23,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:43:23,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:43:24,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:43:24,043 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:43:24,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:43:24,173 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:43:24,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:43:24 WrapperNode [2020-08-21 18:43:24,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:43:24,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:43:24,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:43:24,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:43:24,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:43:24" (1/1) ... [2020-08-21 18:43:24,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:43:24" (1/1) ... [2020-08-21 18:43:24,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:43:24" (1/1) ... [2020-08-21 18:43:24,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:43:24" (1/1) ... [2020-08-21 18:43:24,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:43:24" (1/1) ... [2020-08-21 18:43:24,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:43:24" (1/1) ... [2020-08-21 18:43:24,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:43:24" (1/1) ... [2020-08-21 18:43:24,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:43:24,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:43:24,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:43:24,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:43:24,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:43:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:43:24,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:43:24,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:43:24,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 18:43:24,336 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 18:43:24,336 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 18:43:24,336 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 18:43:24,336 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 18:43:24,336 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 18:43:24,337 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 18:43:24,337 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 18:43:24,337 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 18:43:24,337 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-21 18:43:24,337 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 18:43:24,337 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 18:43:24,337 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 18:43:24,338 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 18:43:24,338 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 18:43:24,338 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 18:43:24,338 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 18:43:24,338 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 18:43:24,338 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 18:43:24,338 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 18:43:24,339 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 18:43:24,339 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 18:43:24,339 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 18:43:24,339 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 18:43:24,339 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 18:43:24,339 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 18:43:24,340 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 18:43:24,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 18:43:24,340 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 18:43:24,340 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 18:43:24,340 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 18:43:24,340 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 18:43:24,341 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:43:24,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 18:43:24,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 18:43:24,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 18:43:24,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 18:43:24,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 18:43:24,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 18:43:24,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 18:43:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:43:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:43:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 18:43:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 18:43:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 18:43:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 18:43:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 18:43:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 18:43:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 18:43:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 18:43:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 18:43:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 18:43:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 18:43:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 18:43:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 18:43:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 18:43:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 18:43:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 18:43:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 18:43:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 18:43:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 18:43:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 18:43:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 18:43:24,346 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 18:43:24,346 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 18:43:24,346 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 18:43:24,346 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 18:43:24,346 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 18:43:24,346 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-21 18:43:24,346 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 18:43:24,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:43:24,347 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 18:43:24,347 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 18:43:24,347 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 18:43:24,347 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 18:43:24,347 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 18:43:24,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:43:24,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 18:43:24,348 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 18:43:24,348 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 18:43:24,348 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 18:43:24,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 18:43:24,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 18:43:24,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 18:43:24,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 18:43:24,349 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 18:43:24,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:43:24,349 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 18:43:24,349 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 18:43:24,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 18:43:24,350 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 18:43:24,350 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 18:43:24,350 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 18:43:24,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:43:24,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 18:43:24,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:43:25,435 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:43:25,435 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 18:43:25,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:43:25 BoogieIcfgContainer [2020-08-21 18:43:25,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:43:25,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:43:25,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:43:25,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:43:25,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:43:23" (1/3) ... [2020-08-21 18:43:25,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1568b47e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:43:25, skipping insertion in model container [2020-08-21 18:43:25,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:43:24" (2/3) ... [2020-08-21 18:43:25,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1568b47e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:43:25, skipping insertion in model container [2020-08-21 18:43:25,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:43:25" (3/3) ... [2020-08-21 18:43:25,455 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product55.cil.c [2020-08-21 18:43:25,466 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:43:25,475 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:43:25,488 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:43:25,509 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:43:25,510 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:43:25,510 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:43:25,510 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:43:25,510 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:43:25,511 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:43:25,511 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:43:25,511 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:43:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states. [2020-08-21 18:43:25,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 18:43:25,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:43:25,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:43:25,546 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:43:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:43:25,552 INFO L82 PathProgramCache]: Analyzing trace with hash 616057763, now seen corresponding path program 1 times [2020-08-21 18:43:25,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:43:25,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233438909] [2020-08-21 18:43:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:43:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:26,167 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:43:26,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:43:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:26,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:43:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:26,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:43:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:26,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:43:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:26,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:43:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:26,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 18:43:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:26,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 18:43:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:43:26,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233438909] [2020-08-21 18:43:26,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:43:26,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:43:26,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630178404] [2020-08-21 18:43:26,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:43:26,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:43:26,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:43:26,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:43:26,303 INFO L87 Difference]: Start difference. First operand 192 states. Second operand 3 states. [2020-08-21 18:43:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:43:27,669 INFO L93 Difference]: Finished difference Result 343 states and 450 transitions. [2020-08-21 18:43:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:43:27,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 18:43:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:43:27,686 INFO L225 Difference]: With dead ends: 343 [2020-08-21 18:43:27,687 INFO L226 Difference]: Without dead ends: 185 [2020-08-21 18:43:27,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:43:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-08-21 18:43:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 149. [2020-08-21 18:43:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-21 18:43:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2020-08-21 18:43:27,817 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 46 [2020-08-21 18:43:27,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:43:27,818 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2020-08-21 18:43:27,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:43:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2020-08-21 18:43:27,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 18:43:27,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:43:27,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:43:27,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:43:27,829 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:43:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:43:27,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2016430514, now seen corresponding path program 1 times [2020-08-21 18:43:27,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:43:27,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495110463] [2020-08-21 18:43:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:43:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:28,198 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:43:28,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:43:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:28,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:43:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:28,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:43:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:28,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:43:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:28,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:43:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:28,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:43:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:28,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 18:43:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:43:28,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495110463] [2020-08-21 18:43:28,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:43:28,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 18:43:28,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120230925] [2020-08-21 18:43:28,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:43:28,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:43:28,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:43:28,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:43:28,246 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 4 states. [2020-08-21 18:43:28,658 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:43:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:43:29,632 INFO L93 Difference]: Finished difference Result 270 states and 333 transitions. [2020-08-21 18:43:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:43:29,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 18:43:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:43:29,637 INFO L225 Difference]: With dead ends: 270 [2020-08-21 18:43:29,637 INFO L226 Difference]: Without dead ends: 169 [2020-08-21 18:43:29,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:43:29,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-21 18:43:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 140. [2020-08-21 18:43:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 18:43:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2020-08-21 18:43:29,711 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 47 [2020-08-21 18:43:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:43:29,712 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2020-08-21 18:43:29,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:43:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2020-08-21 18:43:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 18:43:29,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:43:29,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:43:29,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:43:29,718 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:43:29,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:43:29,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1603631393, now seen corresponding path program 1 times [2020-08-21 18:43:29,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:43:29,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941634535] [2020-08-21 18:43:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:43:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:30,106 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:43:30,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:43:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:30,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:43:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:30,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:43:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:30,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:43:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:30,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:43:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:30,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:43:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:30,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 18:43:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:43:30,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941634535] [2020-08-21 18:43:30,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:43:30,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 18:43:30,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098398892] [2020-08-21 18:43:30,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:43:30,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:43:30,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:43:30,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:43:30,233 INFO L87 Difference]: Start difference. First operand 140 states and 166 transitions. Second operand 8 states. [2020-08-21 18:43:30,591 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:43:30,917 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:43:31,152 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:43:31,376 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:43:32,072 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:43:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:43:34,175 INFO L93 Difference]: Finished difference Result 476 states and 596 transitions. [2020-08-21 18:43:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:43:34,180 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-21 18:43:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:43:34,185 INFO L225 Difference]: With dead ends: 476 [2020-08-21 18:43:34,186 INFO L226 Difference]: Without dead ends: 360 [2020-08-21 18:43:34,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:43:34,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-08-21 18:43:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 298. [2020-08-21 18:43:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-08-21 18:43:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2020-08-21 18:43:34,267 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 51 [2020-08-21 18:43:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:43:34,268 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2020-08-21 18:43:34,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:43:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2020-08-21 18:43:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 18:43:34,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:43:34,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:43:34,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:43:34,270 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:43:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:43:34,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1180849517, now seen corresponding path program 1 times [2020-08-21 18:43:34,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:43:34,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417501685] [2020-08-21 18:43:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:43:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:34,592 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:43:34,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:43:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:34,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:43:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:34,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:43:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:34,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:43:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:34,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:43:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:34,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:43:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:34,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 18:43:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:34,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 18:43:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:43:34,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417501685] [2020-08-21 18:43:34,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:43:34,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 18:43:34,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089289558] [2020-08-21 18:43:34,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:43:34,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:43:34,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:43:34,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:43:34,678 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand 8 states. [2020-08-21 18:43:35,048 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:43:35,930 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:43:36,385 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:43:36,694 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:43:36,954 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:43:37,602 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:43:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:43:38,731 INFO L93 Difference]: Finished difference Result 960 states and 1249 transitions. [2020-08-21 18:43:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 18:43:38,732 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 18:43:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:43:38,741 INFO L225 Difference]: With dead ends: 960 [2020-08-21 18:43:38,741 INFO L226 Difference]: Without dead ends: 686 [2020-08-21 18:43:38,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:43:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2020-08-21 18:43:38,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 551. [2020-08-21 18:43:38,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-08-21 18:43:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 678 transitions. [2020-08-21 18:43:38,918 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 678 transitions. Word has length 57 [2020-08-21 18:43:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:43:38,918 INFO L479 AbstractCegarLoop]: Abstraction has 551 states and 678 transitions. [2020-08-21 18:43:38,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:43:38,919 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 678 transitions. [2020-08-21 18:43:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 18:43:38,921 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:43:38,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:43:38,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:43:38,922 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:43:38,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:43:38,922 INFO L82 PathProgramCache]: Analyzing trace with hash -687352489, now seen corresponding path program 1 times [2020-08-21 18:43:38,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:43:38,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465702022] [2020-08-21 18:43:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:43:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:39,232 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:43:39,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:43:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:39,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:43:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:39,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:43:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:39,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:43:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:39,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:43:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:39,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 18:43:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:39,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:43:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:39,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 18:43:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:39,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 18:43:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:43:39,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465702022] [2020-08-21 18:43:39,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:43:39,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 18:43:39,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965248946] [2020-08-21 18:43:39,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:43:39,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:43:39,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:43:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:43:39,336 INFO L87 Difference]: Start difference. First operand 551 states and 678 transitions. Second operand 9 states. [2020-08-21 18:43:39,704 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:43:40,631 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:43:40,903 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:43:41,141 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:43:41,735 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:43:42,027 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:43:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:43:43,153 INFO L93 Difference]: Finished difference Result 1523 states and 2048 transitions. [2020-08-21 18:43:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 18:43:43,154 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-21 18:43:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:43:43,162 INFO L225 Difference]: With dead ends: 1523 [2020-08-21 18:43:43,162 INFO L226 Difference]: Without dead ends: 996 [2020-08-21 18:43:43,165 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 [2020-08-21 18:43:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2020-08-21 18:43:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 815. [2020-08-21 18:43:43,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 815 states. [2020-08-21 18:43:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1007 transitions. [2020-08-21 18:43:43,328 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1007 transitions. Word has length 61 [2020-08-21 18:43:43,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:43:43,329 INFO L479 AbstractCegarLoop]: Abstraction has 815 states and 1007 transitions. [2020-08-21 18:43:43,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:43:43,329 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1007 transitions. [2020-08-21 18:43:43,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 18:43:43,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:43:43,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:43:43,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:43:43,332 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:43:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:43:43,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1185420344, now seen corresponding path program 1 times [2020-08-21 18:43:43,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:43:43,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649294932] [2020-08-21 18:43:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:43:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,575 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:43:43,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:43:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:43:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:43:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:43:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:43:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 18:43:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 18:43:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:43:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:43:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:43:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:43:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:43:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 18:43:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 18:43:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:43:43,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649294932] [2020-08-21 18:43:43,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:43:43,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 18:43:43,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315556824] [2020-08-21 18:43:43,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:43:43,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:43:43,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:43:43,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:43:43,772 INFO L87 Difference]: Start difference. First operand 815 states and 1007 transitions. Second operand 9 states. [2020-08-21 18:43:44,799 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:43:45,075 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 18:43:45,344 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:43:45,591 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:43:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:43:46,809 INFO L93 Difference]: Finished difference Result 1863 states and 2473 transitions. [2020-08-21 18:43:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:43:46,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-08-21 18:43:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:43:46,825 INFO L225 Difference]: With dead ends: 1863 [2020-08-21 18:43:46,825 INFO L226 Difference]: Without dead ends: 1072 [2020-08-21 18:43:46,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:43:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2020-08-21 18:43:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 841. [2020-08-21 18:43:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2020-08-21 18:43:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1035 transitions. [2020-08-21 18:43:47,014 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1035 transitions. Word has length 88 [2020-08-21 18:43:47,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:43:47,014 INFO L479 AbstractCegarLoop]: Abstraction has 841 states and 1035 transitions. [2020-08-21 18:43:47,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:43:47,015 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1035 transitions. [2020-08-21 18:43:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 18:43:47,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:43:47,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:43:47,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:43:47,021 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:43:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:43:47,021 INFO L82 PathProgramCache]: Analyzing trace with hash -910660730, now seen corresponding path program 1 times [2020-08-21 18:43:47,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:43:47,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343344536] [2020-08-21 18:43:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:43:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,304 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:43:47,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:43:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:43:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:43:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:43:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:43:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 18:43:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 18:43:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:43:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:43:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:43:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:43:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:43:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 18:43:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 18:43:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:43:47,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343344536] [2020-08-21 18:43:47,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:43:47,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 18:43:47,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339895422] [2020-08-21 18:43:47,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 18:43:47,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:43:47,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 18:43:47,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:43:47,482 INFO L87 Difference]: Start difference. First operand 841 states and 1035 transitions. Second operand 11 states. [2020-08-21 18:43:47,989 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:43:48,215 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:43:48,435 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:43:49,150 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:43:49,393 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:43:49,636 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:43:50,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:43:50,960 INFO L93 Difference]: Finished difference Result 1917 states and 2592 transitions. [2020-08-21 18:43:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 18:43:50,962 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 88 [2020-08-21 18:43:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:43:50,969 INFO L225 Difference]: With dead ends: 1917 [2020-08-21 18:43:50,970 INFO L226 Difference]: Without dead ends: 1100 [2020-08-21 18:43:50,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 18:43:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2020-08-21 18:43:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 857. [2020-08-21 18:43:51,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-08-21 18:43:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1051 transitions. [2020-08-21 18:43:51,118 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1051 transitions. Word has length 88 [2020-08-21 18:43:51,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:43:51,119 INFO L479 AbstractCegarLoop]: Abstraction has 857 states and 1051 transitions. [2020-08-21 18:43:51,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 18:43:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1051 transitions. [2020-08-21 18:43:51,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 18:43:51,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:43:51,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:43:51,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:43:51,121 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:43:51,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:43:51,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1039639525, now seen corresponding path program 1 times [2020-08-21 18:43:51,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:43:51,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497388784] [2020-08-21 18:43:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:43:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,372 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:43:51,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:43:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:43:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:43:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:43:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:43:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 18:43:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 18:43:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:43:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:43:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:43:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:43:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:43:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 18:43:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 18:43:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:43:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:43:51,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497388784] [2020-08-21 18:43:51,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:43:51,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 18:43:51,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152662998] [2020-08-21 18:43:51,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:43:51,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:43:51,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:43:51,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:43:51,552 INFO L87 Difference]: Start difference. First operand 857 states and 1051 transitions. Second operand 7 states. [2020-08-21 18:43:51,995 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:43:52,442 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:43:55,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:43:55,163 INFO L93 Difference]: Finished difference Result 2846 states and 3865 transitions. [2020-08-21 18:43:55,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 18:43:55,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 88 [2020-08-21 18:43:55,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:43:55,178 INFO L225 Difference]: With dead ends: 2846 [2020-08-21 18:43:55,178 INFO L226 Difference]: Without dead ends: 2013 [2020-08-21 18:43:55,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:43:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2020-08-21 18:43:55,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1711. [2020-08-21 18:43:55,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1711 states. [2020-08-21 18:43:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2117 transitions. [2020-08-21 18:43:55,555 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2117 transitions. Word has length 88 [2020-08-21 18:43:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:43:55,555 INFO L479 AbstractCegarLoop]: Abstraction has 1711 states and 2117 transitions. [2020-08-21 18:43:55,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:43:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2117 transitions. [2020-08-21 18:43:55,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 18:43:55,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:43:55,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:43:55,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:43:55,560 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:43:55,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:43:55,560 INFO L82 PathProgramCache]: Analyzing trace with hash 745790239, now seen corresponding path program 1 times [2020-08-21 18:43:55,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:43:55,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285914748] [2020-08-21 18:43:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:43:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:43:55,627 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:43:55,628 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:43:55,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:43:55,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:43:55 BoogieIcfgContainer [2020-08-21 18:43:55,675 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:43:55,677 INFO L168 Benchmark]: Toolchain (without parser) took 32166.32 ms. Allocated memory was 138.9 MB in the beginning and 671.1 MB in the end (delta: 532.2 MB). Free memory was 101.1 MB in the beginning and 83.5 MB in the end (delta: 17.7 MB). Peak memory consumption was 549.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:43:55,678 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 18:43:55,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.24 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 100.9 MB in the beginning and 169.7 MB in the end (delta: -68.8 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:43:55,691 INFO L168 Benchmark]: Boogie Preprocessor took 94.55 ms. Allocated memory is still 202.9 MB. Free memory was 169.7 MB in the beginning and 165.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:43:55,692 INFO L168 Benchmark]: RCFGBuilder took 1175.61 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 165.5 MB in the beginning and 193.3 MB in the end (delta: -27.8 MB). Peak memory consumption was 84.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:43:55,693 INFO L168 Benchmark]: TraceAbstraction took 30228.10 ms. Allocated memory was 234.4 MB in the beginning and 671.1 MB in the end (delta: 436.7 MB). Free memory was 193.3 MB in the beginning and 83.5 MB in the end (delta: 109.8 MB). Peak memory consumption was 546.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:43:55,702 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 662.24 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 100.9 MB in the beginning and 169.7 MB in the end (delta: -68.8 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 94.55 ms. Allocated memory is still 202.9 MB. Free memory was 169.7 MB in the beginning and 165.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1175.61 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 165.5 MB in the beginning and 193.3 MB in the end (delta: -27.8 MB). Peak memory consumption was 84.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30228.10 ms. Allocated memory was 234.4 MB in the beginning and 671.1 MB in the end (delta: 436.7 MB). Free memory was 193.3 MB in the beginning and 83.5 MB in the end (delta: 109.8 MB). Peak memory consumption was 546.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 506]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L159] int pumpRunning = 0; [L160] int systemActive = 1; [L399] int waterLevel = 1; [L400] int methaneLevelCritical = 0; [L511] int cleanupTimeShifts = 4; [L802] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L584] int retValue_acc ; [L585] int tmp ; [L589] FCALL select_helpers() [L590] FCALL select_features() [L591] CALL, EXPR valid_product() [L69] int retValue_acc ; [L72] retValue_acc = 1 [L73] return (retValue_acc); [L591] RET, EXPR valid_product() [L591] tmp = valid_product() [L593] COND TRUE \read(tmp) [L595] FCALL setup() [L596] CALL runTest() [L578] CALL test() [L84] int splverifierCounter ; [L85] int tmp ; [L86] int tmp___0 ; [L87] int tmp___1 ; [L88] int tmp___2 ; [L91] splverifierCounter = 0 [L93] COND TRUE 1 [L95] COND TRUE splverifierCounter < 4 [L101] tmp = __VERIFIER_nondet_int() [L103] COND TRUE \read(tmp) [L105] CALL waterRise() [L417] COND TRUE waterLevel < 2 [L418] waterLevel = waterLevel + 1 [L105] RET waterRise() [L111] tmp___0 = __VERIFIER_nondet_int() [L113] COND TRUE \read(tmp___0) [L115] CALL changeMethaneLevel() [L429] COND FALSE !(\read(methaneLevelCritical)) [L432] methaneLevelCritical = 1 [L115] RET changeMethaneLevel() [L121] tmp___2 = __VERIFIER_nondet_int() [L123] COND TRUE \read(tmp___2) [L138] CALL timeShift() [L167] COND FALSE !(\read(pumpRunning)) [L174] COND TRUE \read(systemActive) [L176] CALL processEnvironment() [L248] int tmp ; [L251] COND FALSE !(\read(pumpRunning)) [L266] CALL processEnvironment__wrappee__lowWaterSensor() [L222] int tmp ; [L225] COND FALSE !(\read(pumpRunning)) [L240] CALL processEnvironment__wrappee__highWaterSensor() [L196] int tmp ; [L199] COND TRUE ! pumpRunning [L201] CALL, EXPR isHighWaterLevel() [L345] int retValue_acc ; [L346] int tmp ; [L347] int tmp___0 ; [L351] CALL, EXPR isHighWaterSensorDry() [L479] int retValue_acc ; [L482] COND FALSE !(waterLevel < 2) [L486] retValue_acc = 0 [L487] return (retValue_acc); [L351] RET, EXPR isHighWaterSensorDry() [L351] tmp = isHighWaterSensorDry() [L353] COND FALSE !(\read(tmp)) [L356] tmp___0 = 1 [L358] retValue_acc = tmp___0 [L359] return (retValue_acc); [L201] RET, EXPR isHighWaterLevel() [L201] tmp = isHighWaterLevel() [L203] COND TRUE \read(tmp) [L205] CALL activatePump() [L276] pumpRunning = 1 [L205] RET activatePump() [L240] RET processEnvironment__wrappee__highWaterSensor() [L266] RET processEnvironment__wrappee__lowWaterSensor() [L176] RET processEnvironment() [L182] CALL __utac_acc__Specification1_spec__1() [L608] int tmp ; [L609] int tmp___0 ; [L613] CALL, EXPR isMethaneLevelCritical() [L438] int retValue_acc ; [L441] retValue_acc = methaneLevelCritical [L442] return (retValue_acc); [L613] RET, EXPR isMethaneLevelCritical() [L613] tmp = isMethaneLevelCritical() [L615] COND TRUE \read(tmp) [L617] CALL, EXPR isPumpRunning() [L300] int retValue_acc ; [L303] retValue_acc = pumpRunning [L304] return (retValue_acc); [L617] RET, EXPR isPumpRunning() [L617] tmp___0 = isPumpRunning() [L619] COND TRUE \read(tmp___0) [L621] CALL __automaton_fail() [L506] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 42 procedures, 251 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.1s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 24.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1099 SDtfs, 1942 SDslu, 1143 SDs, 0 SdLazy, 5833 SolverSat, 1210 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1711occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 1219 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 618 NumberOfCodeBlocks, 618 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 518 ConstructedInterpolants, 0 QuantifiedInterpolants, 157644 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...