/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product36.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:03:53,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:03:53,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:03:53,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:03:53,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:03:53,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:03:53,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:03:53,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:03:53,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:03:53,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:03:53,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:03:53,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:03:53,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:03:53,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:03:53,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:03:53,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:03:53,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:03:53,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:03:53,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:03:53,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:03:53,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:03:53,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:03:53,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:03:53,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:03:53,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 20:03:53,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 20:03:53,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 20:03:53,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 20:03:53,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 20:03:53,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 20:03:53,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 20:03:53,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 20:03:53,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 20:03:53,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 20:03:53,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 20:03:53,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 20:03:53,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 20:03:53,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 20:03:53,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:03:53,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:03:53,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:03:53,918 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 [2020-08-18 20:03:53,944 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:03:53,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:03:53,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:03:53,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:03:53,947 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:03:53,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:03:53,948 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:03:53,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:03:53,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:03:53,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:03:53,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:03:53,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:03:53,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:03:53,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:03:53,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:03:53,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:03:53,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:03:53,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:03:53,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:03:53,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:03:53,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:03:53,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:03:53,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:03:53,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:03:53,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:03:53,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:03:53,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:03:53,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:03:53,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:03:53,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:03:54,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:03:54,282 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:03:54,287 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:03:54,288 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:03:54,289 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:03:54,290 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product36.cil.c [2020-08-18 20:03:54,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae34b40d9/c5009b0cebaa4738a9793d7b560a591f/FLAGa084e2c88 [2020-08-18 20:03:54,861 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:03:54,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product36.cil.c [2020-08-18 20:03:54,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae34b40d9/c5009b0cebaa4738a9793d7b560a591f/FLAGa084e2c88 [2020-08-18 20:03:55,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae34b40d9/c5009b0cebaa4738a9793d7b560a591f [2020-08-18 20:03:55,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:03:55,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:03:55,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:03:55,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:03:55,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:03:55,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:03:55" (1/1) ... [2020-08-18 20:03:55,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190b9cb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:03:55, skipping insertion in model container [2020-08-18 20:03:55,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:03:55" (1/1) ... [2020-08-18 20:03:55,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:03:55,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:03:55,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:03:55,682 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:03:55,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:03:55,834 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:03:55,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:03:55 WrapperNode [2020-08-18 20:03:55,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:03:55,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:03:55,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:03:55,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:03:55,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:03:55" (1/1) ... [2020-08-18 20:03:55,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:03:55" (1/1) ... [2020-08-18 20:03:55,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:03:55" (1/1) ... [2020-08-18 20:03:55,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:03:55" (1/1) ... [2020-08-18 20:03:55,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:03:55" (1/1) ... [2020-08-18 20:03:55,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:03:55" (1/1) ... [2020-08-18 20:03:55,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:03:55" (1/1) ... [2020-08-18 20:03:55,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:03:55,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:03:55,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:03:55,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:03:55,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:03:55" (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 [2020-08-18 20:03:56,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:03:56,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:03:56,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 20:03:56,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 20:03:56,051 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 20:03:56,052 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 20:03:56,052 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 20:03:56,052 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 20:03:56,052 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 20:03:56,052 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 20:03:56,053 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 20:03:56,053 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 20:03:56,054 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 20:03:56,054 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 20:03:56,054 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 20:03:56,055 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 20:03:56,055 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 20:03:56,055 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 20:03:56,056 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 20:03:56,056 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 20:03:56,056 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 20:03:56,056 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 20:03:56,056 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 20:03:56,057 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 20:03:56,057 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 20:03:56,058 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 20:03:56,058 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 20:03:56,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 20:03:56,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 20:03:56,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 20:03:56,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 20:03:56,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 20:03:56,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 20:03:56,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 20:03:56,060 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 20:03:56,060 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 20:03:56,060 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 20:03:56,060 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 20:03:56,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:03:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:03:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:03:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 20:03:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 20:03:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 20:03:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 20:03:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 20:03:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 20:03:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 20:03:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 20:03:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 20:03:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 20:03:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 20:03:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 20:03:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 20:03:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 20:03:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 20:03:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 20:03:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 20:03:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 20:03:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:03:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 20:03:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 20:03:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 20:03:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 20:03:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 20:03:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 20:03:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 20:03:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 20:03:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 20:03:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 20:03:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 20:03:56,069 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 20:03:56,070 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 20:03:56,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 20:03:56,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 20:03:56,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 20:03:56,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 20:03:56,072 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 20:03:56,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:03:56,072 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 20:03:56,072 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 20:03:56,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 20:03:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 20:03:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 20:03:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 20:03:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 20:03:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 20:03:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 20:03:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:03:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:03:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 20:03:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:03:59,371 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:03:59,371 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 20:03:59,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:03:59 BoogieIcfgContainer [2020-08-18 20:03:59,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:03:59,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:03:59,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:03:59,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:03:59,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:03:55" (1/3) ... [2020-08-18 20:03:59,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c91d17e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:03:59, skipping insertion in model container [2020-08-18 20:03:59,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:03:55" (2/3) ... [2020-08-18 20:03:59,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c91d17e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:03:59, skipping insertion in model container [2020-08-18 20:03:59,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:03:59" (3/3) ... [2020-08-18 20:03:59,387 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product36.cil.c [2020-08-18 20:03:59,399 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:03:59,408 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:03:59,428 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:03:59,491 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:03:59,491 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:03:59,491 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:03:59,495 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:03:59,497 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:03:59,497 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:03:59,497 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:03:59,498 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:03:59,559 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-08-18 20:03:59,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 20:03:59,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:03:59,573 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] [2020-08-18 20:03:59,573 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:03:59,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:03:59,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1779053206, now seen corresponding path program 1 times [2020-08-18 20:03:59,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:03:59,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740437954] [2020-08-18 20:03:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:03:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:00,305 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:04:00,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:04:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:00,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:04:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:00,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:04:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:00,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:04:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:00,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:04:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:00,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:04:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:00,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:04:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:04:00,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740437954] [2020-08-18 20:04:00,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:04:00,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:04:00,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000435834] [2020-08-18 20:04:00,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:04:00,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:04:00,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:04:00,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:04:00,456 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 3 states. [2020-08-18 20:04:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:04:01,617 INFO L93 Difference]: Finished difference Result 278 states and 364 transitions. [2020-08-18 20:04:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:04:01,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 20:04:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:04:01,635 INFO L225 Difference]: With dead ends: 278 [2020-08-18 20:04:01,635 INFO L226 Difference]: Without dead ends: 151 [2020-08-18 20:04:01,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:04:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-18 20:04:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 118. [2020-08-18 20:04:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-18 20:04:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2020-08-18 20:04:01,730 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 46 [2020-08-18 20:04:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:04:01,731 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2020-08-18 20:04:01,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:04:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2020-08-18 20:04:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 20:04:01,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:04:01,735 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] [2020-08-18 20:04:01,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:04:01,735 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:04:01,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:04:01,736 INFO L82 PathProgramCache]: Analyzing trace with hash 83171531, now seen corresponding path program 1 times [2020-08-18 20:04:01,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:04:01,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595196429] [2020-08-18 20:04:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:04:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:02,055 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:04:02,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:04:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:02,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:04:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:02,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:04:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:02,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:04:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:02,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:04:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:02,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 20:04:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:02,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 20:04:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:04:02,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595196429] [2020-08-18 20:04:02,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:04:02,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 20:04:02,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637216902] [2020-08-18 20:04:02,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 20:04:02,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:04:02,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 20:04:02,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 20:04:02,145 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand 4 states. [2020-08-18 20:04:02,625 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:04:03,330 INFO L93 Difference]: Finished difference Result 198 states and 241 transitions. [2020-08-18 20:04:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:04:03,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 20:04:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:04:03,333 INFO L225 Difference]: With dead ends: 198 [2020-08-18 20:04:03,333 INFO L226 Difference]: Without dead ends: 135 [2020-08-18 20:04:03,336 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 [2020-08-18 20:04:03,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-08-18 20:04:03,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2020-08-18 20:04:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-18 20:04:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2020-08-18 20:04:03,391 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 47 [2020-08-18 20:04:03,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:04:03,392 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2020-08-18 20:04:03,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 20:04:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2020-08-18 20:04:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 20:04:03,404 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:04:03,405 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] [2020-08-18 20:04:03,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:04:03,405 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:04:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:04:03,406 INFO L82 PathProgramCache]: Analyzing trace with hash -532729622, now seen corresponding path program 1 times [2020-08-18 20:04:03,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:04:03,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451960183] [2020-08-18 20:04:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:04:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:03,813 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:04:03,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:04:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:03,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:04:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:03,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:04:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:03,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:04:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:03,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:04:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:03,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:04:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:03,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 20:04:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:04:03,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451960183] [2020-08-18 20:04:03,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:04:03,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 20:04:03,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208095368] [2020-08-18 20:04:03,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:04:03,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:04:03,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:04:03,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:04:03,929 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 8 states. [2020-08-18 20:04:04,369 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:04:04,638 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:04:04,892 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:04:05,146 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:04:05,888 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:04:07,349 INFO L93 Difference]: Finished difference Result 378 states and 466 transitions. [2020-08-18 20:04:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:04:07,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-18 20:04:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:04:07,355 INFO L225 Difference]: With dead ends: 378 [2020-08-18 20:04:07,355 INFO L226 Difference]: Without dead ends: 293 [2020-08-18 20:04:07,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 20:04:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-08-18 20:04:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 220. [2020-08-18 20:04:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-08-18 20:04:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 262 transitions. [2020-08-18 20:04:07,424 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 262 transitions. Word has length 52 [2020-08-18 20:04:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:04:07,425 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 262 transitions. [2020-08-18 20:04:07,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:04:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 262 transitions. [2020-08-18 20:04:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 20:04:07,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:04:07,426 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] [2020-08-18 20:04:07,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:04:07,430 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:04:07,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:04:07,430 INFO L82 PathProgramCache]: Analyzing trace with hash 692647563, now seen corresponding path program 1 times [2020-08-18 20:04:07,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:04:07,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812036039] [2020-08-18 20:04:07,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:04:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:07,722 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:04:07,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:04:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:07,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:04:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:07,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:04:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:07,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:04:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:07,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:04:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:07,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 20:04:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:07,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 20:04:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:07,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 20:04:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:04:07,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812036039] [2020-08-18 20:04:07,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:04:07,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 20:04:07,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82482474] [2020-08-18 20:04:07,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:04:07,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:04:07,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:04:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:04:07,814 INFO L87 Difference]: Start difference. First operand 220 states and 262 transitions. Second operand 8 states. [2020-08-18 20:04:08,311 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:04:09,347 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:04:09,640 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:04:09,934 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:04:10,156 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:04:10,476 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:11,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:04:11,262 INFO L93 Difference]: Finished difference Result 713 states and 925 transitions. [2020-08-18 20:04:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 20:04:11,263 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 20:04:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:04:11,269 INFO L225 Difference]: With dead ends: 713 [2020-08-18 20:04:11,269 INFO L226 Difference]: Without dead ends: 517 [2020-08-18 20:04:11,272 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 [2020-08-18 20:04:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-08-18 20:04:11,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 395. [2020-08-18 20:04:11,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-08-18 20:04:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 474 transitions. [2020-08-18 20:04:11,382 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 474 transitions. Word has length 57 [2020-08-18 20:04:11,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:04:11,383 INFO L479 AbstractCegarLoop]: Abstraction has 395 states and 474 transitions. [2020-08-18 20:04:11,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:04:11,383 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 474 transitions. [2020-08-18 20:04:11,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 20:04:11,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:04:11,385 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] [2020-08-18 20:04:11,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:04:11,386 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:04:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:04:11,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1256704497, now seen corresponding path program 1 times [2020-08-18 20:04:11,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:04:11,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295876875] [2020-08-18 20:04:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:04:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:11,669 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:04:11,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:04:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:11,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:04:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:11,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:04:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:11,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:04:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:11,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:04:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:11,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 20:04:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:11,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:04:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:11,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 20:04:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:11,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 20:04:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:04:11,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295876875] [2020-08-18 20:04:11,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:04:11,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 20:04:11,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702612471] [2020-08-18 20:04:11,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:04:11,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:04:11,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:04:11,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:04:11,810 INFO L87 Difference]: Start difference. First operand 395 states and 474 transitions. Second operand 9 states. [2020-08-18 20:04:12,262 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:04:13,307 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:04:13,582 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:04:13,828 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:04:14,321 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:04:14,593 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:15,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:04:15,406 INFO L93 Difference]: Finished difference Result 1150 states and 1524 transitions. [2020-08-18 20:04:15,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 20:04:15,407 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 20:04:15,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:04:15,415 INFO L225 Difference]: With dead ends: 1150 [2020-08-18 20:04:15,415 INFO L226 Difference]: Without dead ends: 779 [2020-08-18 20:04:15,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 20:04:15,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-08-18 20:04:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 615. [2020-08-18 20:04:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2020-08-18 20:04:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 751 transitions. [2020-08-18 20:04:15,594 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 751 transitions. Word has length 61 [2020-08-18 20:04:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:04:15,594 INFO L479 AbstractCegarLoop]: Abstraction has 615 states and 751 transitions. [2020-08-18 20:04:15,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:04:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 751 transitions. [2020-08-18 20:04:15,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 20:04:15,597 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:04:15,597 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] [2020-08-18 20:04:15,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:04:15,598 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:04:15,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:04:15,598 INFO L82 PathProgramCache]: Analyzing trace with hash 148740965, now seen corresponding path program 1 times [2020-08-18 20:04:15,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:04:15,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187731596] [2020-08-18 20:04:15,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:04:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,862 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:04:15,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:04:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:04:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:04:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:04:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:04:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 20:04:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 20:04:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:04:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:04:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:04:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 20:04:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 20:04:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:04:15,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187731596] [2020-08-18 20:04:15,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:04:15,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 20:04:15,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840918008] [2020-08-18 20:04:15,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:04:15,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:04:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:04:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:04:15,995 INFO L87 Difference]: Start difference. First operand 615 states and 751 transitions. Second operand 9 states. [2020-08-18 20:04:16,440 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:04:17,371 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:17,601 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:04:17,845 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:18,132 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:04:19,684 INFO L93 Difference]: Finished difference Result 2147 states and 3042 transitions. [2020-08-18 20:04:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 20:04:19,684 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-08-18 20:04:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:04:19,697 INFO L225 Difference]: With dead ends: 2147 [2020-08-18 20:04:19,698 INFO L226 Difference]: Without dead ends: 1556 [2020-08-18 20:04:19,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-18 20:04:19,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2020-08-18 20:04:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1159. [2020-08-18 20:04:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1159 states. [2020-08-18 20:04:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1412 transitions. [2020-08-18 20:04:19,940 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1412 transitions. Word has length 79 [2020-08-18 20:04:19,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:04:19,940 INFO L479 AbstractCegarLoop]: Abstraction has 1159 states and 1412 transitions. [2020-08-18 20:04:19,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:04:19,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1412 transitions. [2020-08-18 20:04:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 20:04:19,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:04:19,944 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] [2020-08-18 20:04:19,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:04:19,945 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:04:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:04:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2136122490, now seen corresponding path program 1 times [2020-08-18 20:04:19,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:04:19,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035348911] [2020-08-18 20:04:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:04:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,212 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:04:20,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:04:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:04:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:04:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:04:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:04:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 20:04:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 20:04:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:04:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:04:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:04:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 20:04:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 20:04:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:04:20,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035348911] [2020-08-18 20:04:20,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:04:20,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 20:04:20,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768490488] [2020-08-18 20:04:20,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:04:20,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:04:20,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:04:20,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:04:20,368 INFO L87 Difference]: Start difference. First operand 1159 states and 1412 transitions. Second operand 9 states. [2020-08-18 20:04:21,418 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:21,644 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:04:21,917 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:22,168 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:04:23,306 INFO L93 Difference]: Finished difference Result 2704 states and 3585 transitions. [2020-08-18 20:04:23,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:04:23,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-08-18 20:04:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:04:23,320 INFO L225 Difference]: With dead ends: 2704 [2020-08-18 20:04:23,321 INFO L226 Difference]: Without dead ends: 1569 [2020-08-18 20:04:23,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 20:04:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-08-18 20:04:23,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1199. [2020-08-18 20:04:23,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1199 states. [2020-08-18 20:04:23,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1452 transitions. [2020-08-18 20:04:23,556 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1452 transitions. Word has length 79 [2020-08-18 20:04:23,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:04:23,556 INFO L479 AbstractCegarLoop]: Abstraction has 1199 states and 1452 transitions. [2020-08-18 20:04:23,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:04:23,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1452 transitions. [2020-08-18 20:04:23,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 20:04:23,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:04:23,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:04:23,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 20:04:23,559 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:04:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:04:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1649371716, now seen corresponding path program 1 times [2020-08-18 20:04:23,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:04:23,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482796308] [2020-08-18 20:04:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:04:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,849 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:04:23,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:04:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:04:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:04:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:04:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:04:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 20:04:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 20:04:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:04:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:04:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:04:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 20:04:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 20:04:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:04:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:04:23,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482796308] [2020-08-18 20:04:23,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:04:23,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 20:04:23,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032398721] [2020-08-18 20:04:23,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 20:04:23,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:04:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 20:04:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:04:23,997 INFO L87 Difference]: Start difference. First operand 1199 states and 1452 transitions. Second operand 11 states. [2020-08-18 20:04:24,559 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:24,790 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:25,011 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:25,701 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:25,965 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:26,210 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:04:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:04:27,154 INFO L93 Difference]: Finished difference Result 2398 states and 3135 transitions. [2020-08-18 20:04:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 20:04:27,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-08-18 20:04:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:04:27,163 INFO L225 Difference]: With dead ends: 2398 [2020-08-18 20:04:27,163 INFO L226 Difference]: Without dead ends: 1223 [2020-08-18 20:04:27,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 20:04:27,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2020-08-18 20:04:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 973. [2020-08-18 20:04:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2020-08-18 20:04:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1148 transitions. [2020-08-18 20:04:27,377 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1148 transitions. Word has length 79 [2020-08-18 20:04:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:04:27,378 INFO L479 AbstractCegarLoop]: Abstraction has 973 states and 1148 transitions. [2020-08-18 20:04:27,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 20:04:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1148 transitions. [2020-08-18 20:04:27,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 20:04:27,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:04:27,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:04:27,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 20:04:27,384 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:04:27,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:04:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash -453271351, now seen corresponding path program 1 times [2020-08-18 20:04:27,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:04:27,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486648782] [2020-08-18 20:04:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:04:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 20:04:27,482 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 20:04:27,482 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 20:04:27,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 20:04:27,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:04:27 BoogieIcfgContainer [2020-08-18 20:04:27,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:04:27,544 INFO L168 Benchmark]: Toolchain (without parser) took 32347.28 ms. Allocated memory was 138.9 MB in the beginning and 656.9 MB in the end (delta: 518.0 MB). Free memory was 101.0 MB in the beginning and 274.6 MB in the end (delta: -173.6 MB). Peak memory consumption was 344.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:04:27,549 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-18 20:04:27,551 INFO L168 Benchmark]: CACSL2BoogieTranslator took 636.66 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.0 MB in the beginning and 169.5 MB in the end (delta: -68.5 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-08-18 20:04:27,556 INFO L168 Benchmark]: Boogie Preprocessor took 134.21 ms. Allocated memory is still 201.9 MB. Free memory was 169.5 MB in the beginning and 165.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-08-18 20:04:27,558 INFO L168 Benchmark]: RCFGBuilder took 3408.11 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 165.5 MB in the beginning and 197.4 MB in the end (delta: -32.0 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2020-08-18 20:04:27,559 INFO L168 Benchmark]: TraceAbstraction took 28163.10 ms. Allocated memory was 233.8 MB in the beginning and 656.9 MB in the end (delta: 423.1 MB). Free memory was 197.4 MB in the beginning and 274.6 MB in the end (delta: -77.2 MB). Peak memory consumption was 346.0 MB. Max. memory is 7.1 GB. [2020-08-18 20:04:27,566 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 636.66 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.0 MB in the beginning and 169.5 MB in the end (delta: -68.5 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.21 ms. Allocated memory is still 201.9 MB. Free memory was 169.5 MB in the beginning and 165.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3408.11 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 165.5 MB in the beginning and 197.4 MB in the end (delta: -32.0 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28163.10 ms. Allocated memory was 233.8 MB in the beginning and 656.9 MB in the end (delta: 423.1 MB). Free memory was 197.4 MB in the beginning and 274.6 MB in the end (delta: -77.2 MB). Peak memory consumption was 346.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 44]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L60] int pumpRunning = 0; [L61] int systemActive = 1; [L239] int waterLevel = 1; [L240] int methaneLevelCritical = 0; [L610] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L833] int cleanupTimeShifts = 4; [L906] int retValue_acc ; [L907] int tmp ; [L911] FCALL select_helpers() [L912] FCALL select_features() [L913] CALL, EXPR valid_product() [L432] int retValue_acc ; [L435] retValue_acc = 1 [L436] return (retValue_acc); [L913] RET, EXPR valid_product() [L913] tmp = valid_product() [L915] COND TRUE \read(tmp) [L917] FCALL setup() [L918] CALL runTest() [L900] CALL test() [L335] int splverifierCounter ; [L336] int tmp ; [L337] int tmp___0 ; [L338] int tmp___1 ; [L339] int tmp___2 ; [L342] splverifierCounter = 0 [L344] COND TRUE 1 [L346] COND TRUE splverifierCounter < 4 [L352] tmp = __VERIFIER_nondet_int() [L354] COND TRUE \read(tmp) [L356] CALL waterRise() [L257] COND TRUE waterLevel < 2 [L258] waterLevel = waterLevel + 1 [L356] RET waterRise() [L362] tmp___0 = __VERIFIER_nondet_int() [L364] COND TRUE \read(tmp___0) [L366] CALL changeMethaneLevel() [L269] COND FALSE !(\read(methaneLevelCritical)) [L272] methaneLevelCritical = 1 [L366] RET changeMethaneLevel() [L372] tmp___2 = __VERIFIER_nondet_int() [L374] COND FALSE !(\read(tmp___2)) [L380] tmp___1 = __VERIFIER_nondet_int() [L382] COND FALSE !(\read(tmp___1)) [L391] CALL timeShift() [L68] COND FALSE !(\read(pumpRunning)) [L75] COND TRUE \read(systemActive) [L77] CALL processEnvironment() [L97] int tmp ; [L100] COND TRUE ! pumpRunning [L102] CALL, EXPR isHighWaterLevel() [L194] int retValue_acc ; [L195] int tmp ; [L196] int tmp___0 ; [L200] CALL, EXPR isHighWaterSensorDry() [L319] int retValue_acc ; [L322] COND FALSE !(waterLevel < 2) [L326] retValue_acc = 0 [L327] return (retValue_acc); [L200] RET, EXPR isHighWaterSensorDry() [L200] tmp = isHighWaterSensorDry() [L202] COND FALSE !(\read(tmp)) [L205] tmp___0 = 1 [L207] retValue_acc = tmp___0 [L208] return (retValue_acc); [L102] RET, EXPR isHighWaterLevel() [L102] tmp = isHighWaterLevel() [L104] COND TRUE \read(tmp) [L106] CALL activatePump() [L125] pumpRunning = 1 [L106] RET activatePump() [L77] RET processEnvironment() [L83] CALL __utac_acc__Specification1_spec__1() [L808] int tmp ; [L809] int tmp___0 ; [L813] CALL, EXPR isMethaneLevelCritical() [L278] int retValue_acc ; [L281] retValue_acc = methaneLevelCritical [L282] return (retValue_acc); [L813] RET, EXPR isMethaneLevelCritical() [L813] tmp = isMethaneLevelCritical() [L815] COND TRUE \read(tmp) [L817] CALL, EXPR isPumpRunning() [L149] int retValue_acc ; [L152] retValue_acc = pumpRunning [L153] return (retValue_acc); [L817] RET, EXPR isPumpRunning() [L817] tmp___0 = isPumpRunning() [L819] COND TRUE \read(tmp___0) [L821] CALL __automaton_fail() [L44] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 39 procedures, 225 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.0s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 22.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 835 SDtfs, 1659 SDslu, 1101 SDs, 0 SdLazy, 4900 SolverSat, 1143 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 260 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1199occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 1435 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 583 NumberOfCodeBlocks, 583 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 492 ConstructedInterpolants, 0 QuantifiedInterpolants, 143100 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...