/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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_product52.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:18:22,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:18:22,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:18:22,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:18:22,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:18:22,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:18:22,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:18:22,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:18:22,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:18:22,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:18:22,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:18:22,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:18:22,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:18:22,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:18:22,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:18:22,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:18:22,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:18:22,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:18:22,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:18:22,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:18:22,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:18:22,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:18:22,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:18:22,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:18:22,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:18:22,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:18:22,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:18:22,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:18:22,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:18:22,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:18:22,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:18:22,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:18:22,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:18:22,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:18:22,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:18:22,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:18:22,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:18:22,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:18:22,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:18:22,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:18:22,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:18:22,931 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 16:18:22,974 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:18:22,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:18:22,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:18:22,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:18:22,977 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:18:22,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:18:22,977 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:18:22,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:18:22,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:18:22,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:18:22,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:18:22,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:18:22,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:18:22,978 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:18:22,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:18:22,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:18:22,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:18:22,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:18:22,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:18:22,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:18:22,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:18:22,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:18:22,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:18:22,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:18:22,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:18:22,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:18:22,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:18:22,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:18:22,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:18:22,983 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:18:23,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:18:23,338 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:18:23,344 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:18:23,346 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:18:23,347 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:18:23,347 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product52.cil.c [2020-08-21 16:18:23,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4efd22f1d/6f520d403ec04a9fbdaf7a088d1b3e84/FLAGc6888e4ee [2020-08-21 16:18:24,043 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:18:24,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product52.cil.c [2020-08-21 16:18:24,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4efd22f1d/6f520d403ec04a9fbdaf7a088d1b3e84/FLAGc6888e4ee [2020-08-21 16:18:24,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4efd22f1d/6f520d403ec04a9fbdaf7a088d1b3e84 [2020-08-21 16:18:24,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:18:24,262 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:18:24,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:18:24,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:18:24,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:18:24,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:18:24" (1/1) ... [2020-08-21 16:18:24,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51800d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:18:24, skipping insertion in model container [2020-08-21 16:18:24,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:18:24" (1/1) ... [2020-08-21 16:18:24,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:18:24,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:18:24,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:18:24,865 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:18:24,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:18:24,999 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:18:24,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:18:24 WrapperNode [2020-08-21 16:18:24,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:18:25,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:18:25,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:18:25,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:18:25,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:18:24" (1/1) ... [2020-08-21 16:18:25,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:18:24" (1/1) ... [2020-08-21 16:18:25,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:18:24" (1/1) ... [2020-08-21 16:18:25,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:18:24" (1/1) ... [2020-08-21 16:18:25,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:18:24" (1/1) ... [2020-08-21 16:18:25,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:18:24" (1/1) ... [2020-08-21 16:18:25,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:18:24" (1/1) ... [2020-08-21 16:18:25,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:18:25,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:18:25,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:18:25,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:18:25,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:18:24" (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 16:18:25,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:18:25,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:18:25,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 16:18:25,220 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 16:18:25,220 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 16:18:25,220 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 16:18:25,221 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 16:18:25,221 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 16:18:25,221 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 16:18:25,222 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 16:18:25,223 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 16:18:25,223 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 16:18:25,223 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 16:18:25,223 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 16:18:25,223 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 16:18:25,224 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 16:18:25,225 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 16:18:25,225 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 16:18:25,225 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 16:18:25,225 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 16:18:25,226 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 16:18:25,226 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 16:18:25,226 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 16:18:25,226 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 16:18:25,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 16:18:25,227 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 16:18:25,228 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 16:18:25,228 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 16:18:25,228 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 16:18:25,228 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 16:18:25,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:18:25,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 16:18:25,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 16:18:25,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 16:18:25,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 16:18:25,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 16:18:25,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 16:18:25,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 16:18:25,230 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 16:18:25,230 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 16:18:25,231 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 16:18:25,231 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 16:18:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:18:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:18:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 16:18:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 16:18:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 16:18:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 16:18:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 16:18:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 16:18:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 16:18:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 16:18:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 16:18:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 16:18:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 16:18:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 16:18:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 16:18:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 16:18:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 16:18:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 16:18:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 16:18:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 16:18:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 16:18:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 16:18:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 16:18:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 16:18:25,235 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 16:18:25,235 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 16:18:25,235 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 16:18:25,235 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 16:18:25,235 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 16:18:25,235 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 16:18:25,235 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 16:18:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 16:18:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 16:18:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 16:18:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 16:18:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:18:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 16:18:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 16:18:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 16:18:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 16:18:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 16:18:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 16:18:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:18:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 16:18:25,238 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 16:18:25,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:18:25,238 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 16:18:25,238 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 16:18:25,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:18:25,238 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 16:18:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 16:18:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 16:18:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 16:18:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:18:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 16:18:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:18:28,371 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:18:28,372 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 16:18:28,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:18:28 BoogieIcfgContainer [2020-08-21 16:18:28,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:18:28,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:18:28,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:18:28,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:18:28,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:18:24" (1/3) ... [2020-08-21 16:18:28,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be1324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:18:28, skipping insertion in model container [2020-08-21 16:18:28,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:18:24" (2/3) ... [2020-08-21 16:18:28,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be1324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:18:28, skipping insertion in model container [2020-08-21 16:18:28,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:18:28" (3/3) ... [2020-08-21 16:18:28,385 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product52.cil.c [2020-08-21 16:18:28,396 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:18:28,404 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:18:28,418 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:18:28,441 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:18:28,442 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:18:28,442 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:18:28,442 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:18:28,442 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:18:28,442 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:18:28,442 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:18:28,443 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:18:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states. [2020-08-21 16:18:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 16:18:28,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:18:28,478 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 16:18:28,478 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:18:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:18:28,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1875422794, now seen corresponding path program 1 times [2020-08-21 16:18:28,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:18:28,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241859764] [2020-08-21 16:18:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:18:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:29,268 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 16:18:29,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:18:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:29,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:18:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:29,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:18:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:29,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:18:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:29,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:18:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:29,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 16:18:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:29,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 16:18:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:29,364 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 16:18:29,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241859764] [2020-08-21 16:18:29,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:18:29,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:18:29,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590807893] [2020-08-21 16:18:29,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:18:29,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:18:29,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:18:29,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:18:29,391 INFO L87 Difference]: Start difference. First operand 184 states. Second operand 3 states. [2020-08-21 16:18:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:18:30,620 INFO L93 Difference]: Finished difference Result 320 states and 417 transitions. [2020-08-21 16:18:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:18:30,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 16:18:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:18:30,636 INFO L225 Difference]: With dead ends: 320 [2020-08-21 16:18:30,637 INFO L226 Difference]: Without dead ends: 173 [2020-08-21 16:18:30,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:18:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-21 16:18:30,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2020-08-21 16:18:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-21 16:18:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2020-08-21 16:18:30,739 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 46 [2020-08-21 16:18:30,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:18:30,739 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2020-08-21 16:18:30,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:18:30,740 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2020-08-21 16:18:30,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 16:18:30,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:18:30,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:18:30,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:18:30,744 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:18:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:18:30,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2108875382, now seen corresponding path program 1 times [2020-08-21 16:18:30,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:18:30,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640519469] [2020-08-21 16:18:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:18:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:31,075 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 16:18:31,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:18:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:31,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:18:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:31,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:18:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:31,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:18:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:31,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:18:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:31,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 16:18:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:31,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 16:18:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:31,120 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 16:18:31,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640519469] [2020-08-21 16:18:31,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:18:31,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:18:31,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619113092] [2020-08-21 16:18:31,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:18:31,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:18:31,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:18:31,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:18:31,124 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand 4 states. [2020-08-21 16:18:31,609 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:18:32,429 INFO L93 Difference]: Finished difference Result 243 states and 296 transitions. [2020-08-21 16:18:32,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:18:32,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 16:18:32,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:18:32,433 INFO L225 Difference]: With dead ends: 243 [2020-08-21 16:18:32,433 INFO L226 Difference]: Without dead ends: 157 [2020-08-21 16:18:32,435 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 16:18:32,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-08-21 16:18:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 129. [2020-08-21 16:18:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-21 16:18:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2020-08-21 16:18:32,494 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 47 [2020-08-21 16:18:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:18:32,495 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2020-08-21 16:18:32,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:18:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2020-08-21 16:18:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 16:18:32,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:18:32,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:18:32,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:18:32,504 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:18:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:18:32,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2135499519, now seen corresponding path program 1 times [2020-08-21 16:18:32,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:18:32,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447947792] [2020-08-21 16:18:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:18:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:32,862 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 16:18:32,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:18:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:32,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:18:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:32,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:18:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:32,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:18:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:32,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:18:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:32,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 16:18:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:32,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:18:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:32,948 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 16:18:32,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447947792] [2020-08-21 16:18:32,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:18:32,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 16:18:32,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822715143] [2020-08-21 16:18:32,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:18:32,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:18:32,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:18:32,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:18:32,951 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand 8 states. [2020-08-21 16:18:33,362 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 16:18:33,700 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 16:18:33,948 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 16:18:34,165 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 16:18:34,876 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:36,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:18:36,694 INFO L93 Difference]: Finished difference Result 442 states and 547 transitions. [2020-08-21 16:18:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 16:18:36,701 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 16:18:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:18:36,706 INFO L225 Difference]: With dead ends: 442 [2020-08-21 16:18:36,707 INFO L226 Difference]: Without dead ends: 337 [2020-08-21 16:18:36,708 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 16:18:36,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-08-21 16:18:36,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 272. [2020-08-21 16:18:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-08-21 16:18:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 328 transitions. [2020-08-21 16:18:36,777 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 328 transitions. Word has length 52 [2020-08-21 16:18:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:18:36,779 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 328 transitions. [2020-08-21 16:18:36,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:18:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 328 transitions. [2020-08-21 16:18:36,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 16:18:36,785 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:18:36,786 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 16:18:36,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:18:36,786 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:18:36,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:18:36,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1973278076, now seen corresponding path program 1 times [2020-08-21 16:18:36,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:18:36,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367235158] [2020-08-21 16:18:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:18:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:37,159 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 16:18:37,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:18:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:37,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:18:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:37,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:18:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:37,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:18:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:37,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:18:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:37,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 16:18:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:37,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 16:18:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:37,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 16:18:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:37,258 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 16:18:37,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367235158] [2020-08-21 16:18:37,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:18:37,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 16:18:37,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448470886] [2020-08-21 16:18:37,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:18:37,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:18:37,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:18:37,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:18:37,261 INFO L87 Difference]: Start difference. First operand 272 states and 328 transitions. Second operand 8 states. [2020-08-21 16:18:37,790 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 16:18:38,824 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 16:18:39,132 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 16:18:39,422 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 16:18:39,701 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 16:18:40,104 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:18:41,073 INFO L93 Difference]: Finished difference Result 877 states and 1135 transitions. [2020-08-21 16:18:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 16:18:41,074 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 16:18:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:18:41,081 INFO L225 Difference]: With dead ends: 877 [2020-08-21 16:18:41,081 INFO L226 Difference]: Without dead ends: 629 [2020-08-21 16:18:41,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:18:41,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-08-21 16:18:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 499. [2020-08-21 16:18:41,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-08-21 16:18:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 606 transitions. [2020-08-21 16:18:41,219 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 606 transitions. Word has length 57 [2020-08-21 16:18:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:18:41,220 INFO L479 AbstractCegarLoop]: Abstraction has 499 states and 606 transitions. [2020-08-21 16:18:41,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:18:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 606 transitions. [2020-08-21 16:18:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 16:18:41,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:18:41,223 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 16:18:41,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:18:41,223 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:18:41,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:18:41,223 INFO L82 PathProgramCache]: Analyzing trace with hash -820899264, now seen corresponding path program 1 times [2020-08-21 16:18:41,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:18:41,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626664127] [2020-08-21 16:18:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:18:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:41,509 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 16:18:41,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:18:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:41,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:18:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:41,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:18:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:41,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:18:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:41,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:18:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:41,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 16:18:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:41,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:18:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:41,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 16:18:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:41,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 16:18:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:41,638 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 16:18:41,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626664127] [2020-08-21 16:18:41,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:18:41,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 16:18:41,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629974463] [2020-08-21 16:18:41,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:18:41,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:18:41,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:18:41,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:18:41,643 INFO L87 Difference]: Start difference. First operand 499 states and 606 transitions. Second operand 9 states. [2020-08-21 16:18:42,128 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 16:18:43,065 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 16:18:43,347 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 16:18:43,605 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 16:18:44,154 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 16:18:44,459 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:18:45,472 INFO L93 Difference]: Finished difference Result 1401 states and 1876 transitions. [2020-08-21 16:18:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 16:18:45,473 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-21 16:18:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:18:45,481 INFO L225 Difference]: With dead ends: 1401 [2020-08-21 16:18:45,481 INFO L226 Difference]: Without dead ends: 926 [2020-08-21 16:18:45,483 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 16:18:45,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-08-21 16:18:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 739. [2020-08-21 16:18:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2020-08-21 16:18:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 907 transitions. [2020-08-21 16:18:45,613 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 907 transitions. Word has length 61 [2020-08-21 16:18:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:18:45,614 INFO L479 AbstractCegarLoop]: Abstraction has 739 states and 907 transitions. [2020-08-21 16:18:45,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:18:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 907 transitions. [2020-08-21 16:18:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 16:18:45,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:18:45,617 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] [2020-08-21 16:18:45,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:18:45,617 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:18:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:18:45,618 INFO L82 PathProgramCache]: Analyzing trace with hash 16386475, now seen corresponding path program 1 times [2020-08-21 16:18:45,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:18:45,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377084628] [2020-08-21 16:18:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:18:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,859 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 16:18:45,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:18:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:18:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:18:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:18:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:18:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 16:18:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 16:18:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:18:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:18:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:18:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:18:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 16:18:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 16:18:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:45,973 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 16:18:45,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377084628] [2020-08-21 16:18:45,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:18:45,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 16:18:45,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222634191] [2020-08-21 16:18:45,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:18:45,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:18:45,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:18:45,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:18:45,976 INFO L87 Difference]: Start difference. First operand 739 states and 907 transitions. Second operand 9 states. [2020-08-21 16:18:47,189 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:47,409 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:18:47,656 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:47,891 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:48,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:18:48,934 INFO L93 Difference]: Finished difference Result 1717 states and 2277 transitions. [2020-08-21 16:18:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 16:18:48,935 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-08-21 16:18:48,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:18:48,948 INFO L225 Difference]: With dead ends: 1717 [2020-08-21 16:18:48,948 INFO L226 Difference]: Without dead ends: 1002 [2020-08-21 16:18:48,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 16:18:48,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-21 16:18:49,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 765. [2020-08-21 16:18:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-08-21 16:18:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 935 transitions. [2020-08-21 16:18:49,123 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 935 transitions. Word has length 84 [2020-08-21 16:18:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:18:49,123 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 935 transitions. [2020-08-21 16:18:49,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:18:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 935 transitions. [2020-08-21 16:18:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 16:18:49,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:18:49,126 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] [2020-08-21 16:18:49,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:18:49,127 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:18:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:18:49,127 INFO L82 PathProgramCache]: Analyzing trace with hash 39018729, now seen corresponding path program 1 times [2020-08-21 16:18:49,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:18:49,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626304861] [2020-08-21 16:18:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:18:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,389 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 16:18:49,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:18:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:18:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:18:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:18:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:18:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 16:18:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 16:18:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:18:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:18:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:18:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:18:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 16:18:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 16:18:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:49,539 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 16:18:49,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626304861] [2020-08-21 16:18:49,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:18:49,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 16:18:49,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824057854] [2020-08-21 16:18:49,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 16:18:49,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:18:49,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 16:18:49,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:18:49,546 INFO L87 Difference]: Start difference. First operand 765 states and 935 transitions. Second operand 11 states. [2020-08-21 16:18:50,566 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:50,808 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:51,033 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:51,784 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:52,065 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:52,316 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:18:53,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:18:53,677 INFO L93 Difference]: Finished difference Result 1771 states and 2388 transitions. [2020-08-21 16:18:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 16:18:53,678 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-08-21 16:18:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:18:53,686 INFO L225 Difference]: With dead ends: 1771 [2020-08-21 16:18:53,686 INFO L226 Difference]: Without dead ends: 1030 [2020-08-21 16:18:53,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 16:18:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2020-08-21 16:18:53,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 781. [2020-08-21 16:18:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2020-08-21 16:18:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 951 transitions. [2020-08-21 16:18:53,886 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 951 transitions. Word has length 84 [2020-08-21 16:18:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:18:53,887 INFO L479 AbstractCegarLoop]: Abstraction has 781 states and 951 transitions. [2020-08-21 16:18:53,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 16:18:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 951 transitions. [2020-08-21 16:18:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 16:18:53,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:18:53,892 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] [2020-08-21 16:18:53,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:18:53,893 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:18:53,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:18:53,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1064510728, now seen corresponding path program 1 times [2020-08-21 16:18:53,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:18:53,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956039753] [2020-08-21 16:18:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:18:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,203 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 16:18:54,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:18:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:18:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:18:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:18:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:18:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 16:18:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 16:18:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:18:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:18:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:18:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:18:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 16:18:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 16:18:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:18:54,391 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 16:18:54,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956039753] [2020-08-21 16:18:54,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:18:54,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 16:18:54,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756638404] [2020-08-21 16:18:54,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:18:54,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:18:54,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:18:54,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:18:54,395 INFO L87 Difference]: Start difference. First operand 781 states and 951 transitions. Second operand 7 states. [2020-08-21 16:18:54,915 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 16:18:55,421 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 16:18:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:18:57,969 INFO L93 Difference]: Finished difference Result 2699 states and 3665 transitions. [2020-08-21 16:18:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:18:57,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-08-21 16:18:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:18:57,984 INFO L225 Difference]: With dead ends: 2699 [2020-08-21 16:18:57,985 INFO L226 Difference]: Without dead ends: 1942 [2020-08-21 16:18:57,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:18:57,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2020-08-21 16:18:58,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1619. [2020-08-21 16:18:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1619 states. [2020-08-21 16:18:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 1989 transitions. [2020-08-21 16:18:58,373 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 1989 transitions. Word has length 84 [2020-08-21 16:18:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:18:58,373 INFO L479 AbstractCegarLoop]: Abstraction has 1619 states and 1989 transitions. [2020-08-21 16:18:58,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:18:58,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 1989 transitions. [2020-08-21 16:18:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 16:18:58,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:18:58,376 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 16:18:58,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:18:58,377 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:18:58,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:18:58,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1546821858, now seen corresponding path program 1 times [2020-08-21 16:18:58,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:18:58,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492133210] [2020-08-21 16:18:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:18:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:18:58,447 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:18:58,447 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:18:58,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:18:58,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:18:58 BoogieIcfgContainer [2020-08-21 16:18:58,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:18:58,491 INFO L168 Benchmark]: Toolchain (without parser) took 34228.45 ms. Allocated memory was 148.4 MB in the beginning and 607.6 MB in the end (delta: 459.3 MB). Free memory was 102.5 MB in the beginning and 328.2 MB in the end (delta: -225.7 MB). Peak memory consumption was 233.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:18:58,492 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 148.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 16:18:58,495 INFO L168 Benchmark]: CACSL2BoogieTranslator took 736.28 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 102.3 MB in the beginning and 173.1 MB in the end (delta: -70.8 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:18:58,503 INFO L168 Benchmark]: Boogie Preprocessor took 127.89 ms. Allocated memory is still 203.9 MB. Free memory was 173.1 MB in the beginning and 168.6 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:18:58,504 INFO L168 Benchmark]: RCFGBuilder took 3249.24 ms. Allocated memory was 203.9 MB in the beginning and 233.3 MB in the end (delta: 29.4 MB). Free memory was 168.6 MB in the beginning and 190.6 MB in the end (delta: -22.0 MB). Peak memory consumption was 80.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:18:58,505 INFO L168 Benchmark]: TraceAbstraction took 30110.18 ms. Allocated memory was 233.3 MB in the beginning and 607.6 MB in the end (delta: 374.3 MB). Free memory was 190.6 MB in the beginning and 328.2 MB in the end (delta: -137.6 MB). Peak memory consumption was 236.7 MB. Max. memory is 7.1 GB. [2020-08-21 16:18:58,512 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 148.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 736.28 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 102.3 MB in the beginning and 173.1 MB in the end (delta: -70.8 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.89 ms. Allocated memory is still 203.9 MB. Free memory was 173.1 MB in the beginning and 168.6 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3249.24 ms. Allocated memory was 203.9 MB in the beginning and 233.3 MB in the end (delta: 29.4 MB). Free memory was 168.6 MB in the beginning and 190.6 MB in the end (delta: -22.0 MB). Peak memory consumption was 80.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30110.18 ms. Allocated memory was 233.3 MB in the beginning and 607.6 MB in the end (delta: 374.3 MB). Free memory was 190.6 MB in the beginning and 328.2 MB in the end (delta: -137.6 MB). Peak memory consumption was 236.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 383]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L48] int waterLevel = 1; [L49] int methaneLevelCritical = 0; [L158] int pumpRunning = 0; [L159] int systemActive = 1; [L458] int cleanupTimeShifts = 4; [L752] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L534] int retValue_acc ; [L535] int tmp ; [L539] FCALL select_helpers() [L540] FCALL select_features() [L541] CALL, EXPR valid_product() [L975] int retValue_acc ; [L978] retValue_acc = 1 [L979] return (retValue_acc); [L541] RET, EXPR valid_product() [L541] tmp = valid_product() [L543] COND TRUE \read(tmp) [L545] FCALL setup() [L546] CALL runTest() [L525] CALL test() [L390] int splverifierCounter ; [L391] int tmp ; [L392] int tmp___0 ; [L393] int tmp___1 ; [L394] int tmp___2 ; [L397] splverifierCounter = 0 [L399] COND TRUE 1 [L401] COND TRUE splverifierCounter < 4 [L407] tmp = __VERIFIER_nondet_int() [L409] COND TRUE \read(tmp) [L411] CALL waterRise() [L66] COND TRUE waterLevel < 2 [L67] waterLevel = waterLevel + 1 [L411] RET waterRise() [L417] tmp___0 = __VERIFIER_nondet_int() [L419] COND TRUE \read(tmp___0) [L421] CALL changeMethaneLevel() [L78] COND FALSE !(\read(methaneLevelCritical)) [L81] methaneLevelCritical = 1 [L421] RET changeMethaneLevel() [L427] tmp___2 = __VERIFIER_nondet_int() [L429] COND FALSE !(\read(tmp___2)) [L435] tmp___1 = __VERIFIER_nondet_int() [L437] COND FALSE !(\read(tmp___1)) [L446] CALL timeShift() [L166] COND FALSE !(\read(pumpRunning)) [L173] COND TRUE \read(systemActive) [L175] CALL processEnvironment() [L221] int tmp ; [L224] COND FALSE !(\read(pumpRunning)) [L239] CALL processEnvironment__wrappee__highWaterSensor() [L195] int tmp ; [L198] COND TRUE ! pumpRunning [L200] CALL, EXPR isHighWaterLevel() [L318] int retValue_acc ; [L319] int tmp ; [L320] int tmp___0 ; [L324] CALL, EXPR isHighWaterSensorDry() [L128] int retValue_acc ; [L131] COND FALSE !(waterLevel < 2) [L135] retValue_acc = 0 [L136] return (retValue_acc); [L324] RET, EXPR isHighWaterSensorDry() [L324] tmp = isHighWaterSensorDry() [L326] COND FALSE !(\read(tmp)) [L329] tmp___0 = 1 [L331] retValue_acc = tmp___0 [L332] return (retValue_acc); [L200] RET, EXPR isHighWaterLevel() [L200] tmp = isHighWaterLevel() [L202] COND TRUE \read(tmp) [L204] CALL activatePump() [L249] pumpRunning = 1 [L204] RET activatePump() [L239] RET processEnvironment__wrappee__highWaterSensor() [L175] RET processEnvironment() [L181] CALL __utac_acc__Specification1_spec__1() [L558] int tmp ; [L559] int tmp___0 ; [L563] CALL, EXPR isMethaneLevelCritical() [L87] int retValue_acc ; [L90] retValue_acc = methaneLevelCritical [L91] return (retValue_acc); [L563] RET, EXPR isMethaneLevelCritical() [L563] tmp = isMethaneLevelCritical() [L565] COND TRUE \read(tmp) [L567] CALL, EXPR isPumpRunning() [L273] int retValue_acc ; [L276] retValue_acc = pumpRunning [L277] return (retValue_acc); [L567] RET, EXPR isPumpRunning() [L567] tmp___0 = isPumpRunning() [L569] COND TRUE \read(tmp___0) [L571] CALL __automaton_fail() [L383] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 42 procedures, 245 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.0s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 24.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1020 SDtfs, 1814 SDslu, 1110 SDs, 0 SdLazy, 5426 SolverSat, 1167 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1619occurred 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, 1254 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 603 NumberOfCodeBlocks, 603 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 507 ConstructedInterpolants, 0 QuantifiedInterpolants, 150948 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...