/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=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:52:50,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:52:50,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:52:50,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:52:50,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:52:50,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:52:50,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:52:50,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:52:50,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:52:50,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:52:50,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:52:50,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:52:50,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:52:50,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:52:50,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:52:50,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:52:50,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:52:50,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:52:50,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:52:50,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:52:50,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:52:50,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:52:50,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:52:50,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:52:50,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 20:52:50,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 20:52:50,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 20:52:50,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 20:52:51,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 20:52:51,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 20:52:51,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 20:52:51,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 20:52:51,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 20:52:51,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 20:52:51,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 20:52:51,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 20:52:51,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 20:52:51,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 20:52:51,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:52:51,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:52:51,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:52:51,009 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 20:52:51,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:52:51,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:52:51,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:52:51,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:52:51,055 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:52:51,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:52:51,055 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:52:51,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:52:51,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:52:51,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:52:51,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:52:51,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:52:51,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:52:51,058 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:52:51,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:52:51,058 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:52:51,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:52:51,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:52:51,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:52:51,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:52:51,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:52:51,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:52:51,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:52:51,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:52:51,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:52:51,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:52:51,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:52:51,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:52:51,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:52:51,061 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=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 20:52:51,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:52:51,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:52:51,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:52:51,381 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:52:51,382 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:52:51,382 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-08-18 20:52:51,446 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5aa0647e/bdb8724dbef546e7bc986715c4bfefd9/FLAG5854db375 [2020-08-18 20:52:51,918 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:52:51,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-08-18 20:52:51,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5aa0647e/bdb8724dbef546e7bc986715c4bfefd9/FLAG5854db375 [2020-08-18 20:52:52,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5aa0647e/bdb8724dbef546e7bc986715c4bfefd9 [2020-08-18 20:52:52,230 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:52:52,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:52:52,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:52:52,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:52:52,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:52:52,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:52:52" (1/1) ... [2020-08-18 20:52:52,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c3c872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:52:52, skipping insertion in model container [2020-08-18 20:52:52,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:52:52" (1/1) ... [2020-08-18 20:52:52,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:52:52,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:52:52,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:52:52,796 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:52:52,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:52:52,923 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:52:52,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:52:52 WrapperNode [2020-08-18 20:52:52,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:52:52,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:52:52,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:52:52,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:52:52,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:52:52" (1/1) ... [2020-08-18 20:52:52,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:52:52" (1/1) ... [2020-08-18 20:52:52,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:52:52" (1/1) ... [2020-08-18 20:52:52,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:52:52" (1/1) ... [2020-08-18 20:52:52,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:52:52" (1/1) ... [2020-08-18 20:52:52,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:52:52" (1/1) ... [2020-08-18 20:52:52,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:52:52" (1/1) ... [2020-08-18 20:52:53,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:52:53,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:52:53,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:52:53,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:52:53,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:52:52" (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 20:52:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:52:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:52:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 20:52:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 20:52:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 20:52:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 20:52:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 20:52:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 20:52:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 20:52:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 20:52:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 20:52:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 20:52:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 20:52:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 20:52:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 20:52:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 20:52:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 20:52:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 20:52:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 20:52:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 20:52:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 20:52:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 20:52:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 20:52:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 20:52:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 20:52:53,072 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 20:52:53,072 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 20:52:53,072 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 20:52:53,073 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 20:52:53,073 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 20:52:53,073 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 20:52:53,073 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 20:52:53,073 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:52:53,073 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 20:52:53,074 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 20:52:53,074 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 20:52:53,074 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 20:52:53,074 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 20:52:53,074 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 20:52:53,074 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 20:52:53,074 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 20:52:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:52:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:52:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 20:52:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 20:52:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 20:52:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 20:52:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 20:52:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 20:52:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 20:52:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 20:52:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 20:52:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 20:52:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 20:52:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 20:52:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 20:52:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 20:52:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 20:52:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 20:52:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 20:52:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 20:52:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 20:52:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 20:52:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 20:52:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 20:52:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 20:52:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:52:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 20:52:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 20:52:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 20:52:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 20:52:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 20:52:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 20:52:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 20:52:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 20:52:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 20:52:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:52:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 20:52:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 20:52:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 20:52:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 20:52:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 20:52:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 20:52:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 20:52:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 20:52:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 20:52:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 20:52:53,088 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 20:52:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 20:52:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 20:52:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 20:52:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:52:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 20:52:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:52:53,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 20:52:53,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:52:54,132 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:52:54,132 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 20:52:54,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:52:54 BoogieIcfgContainer [2020-08-18 20:52:54,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:52:54,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:52:54,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:52:54,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:52:54,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:52:52" (1/3) ... [2020-08-18 20:52:54,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6030a594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:52:54, skipping insertion in model container [2020-08-18 20:52:54,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:52:52" (2/3) ... [2020-08-18 20:52:54,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6030a594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:52:54, skipping insertion in model container [2020-08-18 20:52:54,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:52:54" (3/3) ... [2020-08-18 20:52:54,150 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product51.cil.c [2020-08-18 20:52:54,161 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:52:54,172 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:52:54,187 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:52:54,207 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:52:54,207 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:52:54,207 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:52:54,207 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:52:54,208 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:52:54,208 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:52:54,208 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:52:54,208 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:52:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-08-18 20:52:54,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 20:52:54,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:52:54,243 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 20:52:54,243 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:52:54,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:52:54,252 INFO L82 PathProgramCache]: Analyzing trace with hash -199381509, now seen corresponding path program 1 times [2020-08-18 20:52:54,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:52:54,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127248728] [2020-08-18 20:52:54,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:52:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:54,909 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:52:54,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:52:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:54,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:52:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:54,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:52:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:54,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:52:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:55,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:52:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:55,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:52:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:55,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:52:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:55,024 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 20:52:55,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127248728] [2020-08-18 20:52:55,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:52:55,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:52:55,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955641464] [2020-08-18 20:52:55,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:52:55,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:52:55,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:52:55,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:52:55,053 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 3 states. [2020-08-18 20:52:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:52:56,308 INFO L93 Difference]: Finished difference Result 311 states and 407 transitions. [2020-08-18 20:52:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:52:56,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 20:52:56,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:52:56,327 INFO L225 Difference]: With dead ends: 311 [2020-08-18 20:52:56,327 INFO L226 Difference]: Without dead ends: 168 [2020-08-18 20:52:56,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:52:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-18 20:52:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2020-08-18 20:52:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-18 20:52:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-08-18 20:52:56,445 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 46 [2020-08-18 20:52:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:52:56,446 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-08-18 20:52:56,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:52:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-08-18 20:52:56,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 20:52:56,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:52:56,465 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 20:52:56,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:52:56,466 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:52:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:52:56,466 INFO L82 PathProgramCache]: Analyzing trace with hash 822116352, now seen corresponding path program 1 times [2020-08-18 20:52:56,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:52:56,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657292090] [2020-08-18 20:52:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:52:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:56,893 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:52:56,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:52:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:56,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:52:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:56,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:52:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:56,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:52:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:56,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:52:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:56,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 20:52:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:56,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 20:52:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:56,965 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 20:52:56,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657292090] [2020-08-18 20:52:56,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:52:56,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 20:52:56,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359509745] [2020-08-18 20:52:56,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 20:52:56,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:52:56,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 20:52:56,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 20:52:56,973 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 4 states. [2020-08-18 20:52:57,449 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:52:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:52:58,263 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-08-18 20:52:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:52:58,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 20:52:58,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:52:58,267 INFO L225 Difference]: With dead ends: 238 [2020-08-18 20:52:58,267 INFO L226 Difference]: Without dead ends: 152 [2020-08-18 20:52:58,269 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 20:52:58,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-18 20:52:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2020-08-18 20:52:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 20:52:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-08-18 20:52:58,332 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 47 [2020-08-18 20:52:58,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:52:58,332 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-08-18 20:52:58,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 20:52:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-08-18 20:52:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 20:52:58,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:52:58,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:52:58,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:52:58,335 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:52:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:52:58,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1772796698, now seen corresponding path program 1 times [2020-08-18 20:52:58,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:52:58,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294593386] [2020-08-18 20:52:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:52:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:58,653 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:52:58,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:52:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:58,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:52:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:58,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:52:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:58,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:52:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:58,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:52:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:58,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:52:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:58,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 20:52:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:52:58,754 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 20:52:58,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294593386] [2020-08-18 20:52:58,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:52:58,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 20:52:58,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363499585] [2020-08-18 20:52:58,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:52:58,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:52:58,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:52:58,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:52:58,762 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 8 states. [2020-08-18 20:52:59,168 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:52:59,508 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:52:59,739 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:52:59,976 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:53:00,731 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:53:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:53:02,507 INFO L93 Difference]: Finished difference Result 427 states and 530 transitions. [2020-08-18 20:53:02,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:53:02,508 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 20:53:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:53:02,513 INFO L225 Difference]: With dead ends: 427 [2020-08-18 20:53:02,513 INFO L226 Difference]: Without dead ends: 326 [2020-08-18 20:53:02,514 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 20:53:02,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-18 20:53:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 268. [2020-08-18 20:53:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-18 20:53:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 324 transitions. [2020-08-18 20:53:02,616 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 324 transitions. Word has length 51 [2020-08-18 20:53:02,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:53:02,617 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 324 transitions. [2020-08-18 20:53:02,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:53:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 324 transitions. [2020-08-18 20:53:02,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 20:53:02,619 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:53:02,620 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 20:53:02,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:53:02,620 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:53:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:53:02,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1539786498, now seen corresponding path program 1 times [2020-08-18 20:53:02,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:53:02,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892718062] [2020-08-18 20:53:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:53:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:02,889 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:53:02,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:53:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:02,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:53:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:02,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:53:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:02,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:53:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:02,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:53:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:02,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 20:53:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:02,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 20:53:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:02,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 20:53:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:02,962 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 20:53:02,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892718062] [2020-08-18 20:53:02,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:53:02,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 20:53:02,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535930860] [2020-08-18 20:53:02,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:53:02,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:53:02,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:53:02,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:53:02,965 INFO L87 Difference]: Start difference. First operand 268 states and 324 transitions. Second operand 8 states. [2020-08-18 20:53:03,330 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:53:04,375 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:53:04,700 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:53:05,005 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:53:05,311 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:53:05,752 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:53:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:53:06,662 INFO L93 Difference]: Finished difference Result 862 states and 1117 transitions. [2020-08-18 20:53:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 20:53:06,668 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 20:53:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:53:06,675 INFO L225 Difference]: With dead ends: 862 [2020-08-18 20:53:06,675 INFO L226 Difference]: Without dead ends: 618 [2020-08-18 20:53:06,677 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 20:53:06,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-18 20:53:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 491. [2020-08-18 20:53:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-08-18 20:53:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 598 transitions. [2020-08-18 20:53:06,815 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 598 transitions. Word has length 57 [2020-08-18 20:53:06,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:53:06,816 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 598 transitions. [2020-08-18 20:53:06,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:53:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 598 transitions. [2020-08-18 20:53:06,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 20:53:06,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:53:06,819 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 20:53:06,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:53:06,819 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:53:06,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:53:06,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1493126654, now seen corresponding path program 1 times [2020-08-18 20:53:06,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:53:06,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824765813] [2020-08-18 20:53:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:53:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:07,122 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:53:07,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:53:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:07,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:53:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:07,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:53:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:07,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:53:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:07,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:53:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:07,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 20:53:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:07,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:53:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:07,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 20:53:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:07,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 20:53:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:07,215 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 20:53:07,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824765813] [2020-08-18 20:53:07,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:53:07,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 20:53:07,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891880361] [2020-08-18 20:53:07,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:53:07,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:53:07,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:53:07,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:53:07,218 INFO L87 Difference]: Start difference. First operand 491 states and 598 transitions. Second operand 9 states. [2020-08-18 20:53:07,594 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:53:08,528 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:53:08,777 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:53:09,031 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:53:09,535 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:53:09,826 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:53:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:53:10,604 INFO L93 Difference]: Finished difference Result 1371 states and 1840 transitions. [2020-08-18 20:53:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 20:53:10,605 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 20:53:10,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:53:10,612 INFO L225 Difference]: With dead ends: 1371 [2020-08-18 20:53:10,612 INFO L226 Difference]: Without dead ends: 904 [2020-08-18 20:53:10,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 20:53:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-08-18 20:53:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 723. [2020-08-18 20:53:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2020-08-18 20:53:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 891 transitions. [2020-08-18 20:53:10,781 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 891 transitions. Word has length 61 [2020-08-18 20:53:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:53:10,782 INFO L479 AbstractCegarLoop]: Abstraction has 723 states and 891 transitions. [2020-08-18 20:53:10,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:53:10,782 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 891 transitions. [2020-08-18 20:53:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 20:53:10,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:53:10,785 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 20:53:10,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:53:10,785 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:53:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:53:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash 807556796, now seen corresponding path program 1 times [2020-08-18 20:53:10,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:53:10,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275820255] [2020-08-18 20:53:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:53:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,028 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:53:11,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:53:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:53:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:53:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:53:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:53:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 20:53:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 20:53:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:53:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:53:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:53:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:53:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 20:53:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 20:53:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:11,170 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 20:53:11,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275820255] [2020-08-18 20:53:11,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:53:11,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 20:53:11,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915596354] [2020-08-18 20:53:11,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:53:11,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:53:11,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:53:11,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:53:11,174 INFO L87 Difference]: Start difference. First operand 723 states and 891 transitions. Second operand 9 states. [2020-08-18 20:53:12,330 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:53:12,606 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:53:12,857 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:53:13,097 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:53:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:53:14,165 INFO L93 Difference]: Finished difference Result 1679 states and 2233 transitions. [2020-08-18 20:53:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:53:14,166 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-08-18 20:53:14,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:53:14,175 INFO L225 Difference]: With dead ends: 1679 [2020-08-18 20:53:14,176 INFO L226 Difference]: Without dead ends: 980 [2020-08-18 20:53:14,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 20:53:14,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-08-18 20:53:14,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 749. [2020-08-18 20:53:14,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-08-18 20:53:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 919 transitions. [2020-08-18 20:53:14,336 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 919 transitions. Word has length 83 [2020-08-18 20:53:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:53:14,337 INFO L479 AbstractCegarLoop]: Abstraction has 749 states and 919 transitions. [2020-08-18 20:53:14,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:53:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 919 transitions. [2020-08-18 20:53:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 20:53:14,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:53:14,341 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 20:53:14,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:53:14,343 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:53:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:53:14,344 INFO L82 PathProgramCache]: Analyzing trace with hash 830189050, now seen corresponding path program 1 times [2020-08-18 20:53:14,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:53:14,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681444673] [2020-08-18 20:53:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:53:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,608 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:53:14,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:53:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:53:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:53:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:53:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:53:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 20:53:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 20:53:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:53:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:53:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:53:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:53:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 20:53:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 20:53:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:14,771 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 20:53:14,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681444673] [2020-08-18 20:53:14,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:53:14,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 20:53:14,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172851788] [2020-08-18 20:53:14,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 20:53:14,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:53:14,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 20:53:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:53:14,773 INFO L87 Difference]: Start difference. First operand 749 states and 919 transitions. Second operand 11 states. [2020-08-18 20:53:15,243 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:53:15,470 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:53:15,694 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:53:16,358 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:53:16,618 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:53:16,868 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:53:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:53:18,223 INFO L93 Difference]: Finished difference Result 1733 states and 2344 transitions. [2020-08-18 20:53:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 20:53:18,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-18 20:53:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:53:18,232 INFO L225 Difference]: With dead ends: 1733 [2020-08-18 20:53:18,232 INFO L226 Difference]: Without dead ends: 1008 [2020-08-18 20:53:18,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 20:53:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-08-18 20:53:18,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 765. [2020-08-18 20:53:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-08-18 20:53:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 935 transitions. [2020-08-18 20:53:18,392 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 935 transitions. Word has length 83 [2020-08-18 20:53:18,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:53:18,392 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 935 transitions. [2020-08-18 20:53:18,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 20:53:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 935 transitions. [2020-08-18 20:53:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 20:53:18,395 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:53:18,396 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 20:53:18,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 20:53:18,396 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:53:18,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:53:18,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1855681049, now seen corresponding path program 1 times [2020-08-18 20:53:18,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:53:18,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221675595] [2020-08-18 20:53:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:53:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,722 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:53:18,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:53:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:53:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:53:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:53:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:53:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 20:53:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 20:53:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:53:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:53:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:53:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:53:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 20:53:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 20:53:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:53:18,889 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 20:53:18,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221675595] [2020-08-18 20:53:18,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:53:18,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 20:53:18,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793266798] [2020-08-18 20:53:18,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:53:18,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:53:18,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:53:18,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:53:18,894 INFO L87 Difference]: Start difference. First operand 765 states and 935 transitions. Second operand 7 states. [2020-08-18 20:53:19,265 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:53:19,888 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:53:22,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:53:22,430 INFO L93 Difference]: Finished difference Result 2622 states and 3569 transitions. [2020-08-18 20:53:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 20:53:22,431 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-08-18 20:53:22,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:53:22,444 INFO L225 Difference]: With dead ends: 2622 [2020-08-18 20:53:22,444 INFO L226 Difference]: Without dead ends: 1881 [2020-08-18 20:53:22,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-18 20:53:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-08-18 20:53:22,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1579. [2020-08-18 20:53:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-08-18 20:53:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 1949 transitions. [2020-08-18 20:53:22,712 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 1949 transitions. Word has length 83 [2020-08-18 20:53:22,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:53:22,712 INFO L479 AbstractCegarLoop]: Abstraction has 1579 states and 1949 transitions. [2020-08-18 20:53:22,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:53:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 1949 transitions. [2020-08-18 20:53:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 20:53:22,715 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:53:22,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:53:22,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 20:53:22,716 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:53:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:53:22,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1308897473, now seen corresponding path program 1 times [2020-08-18 20:53:22,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:53:22,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142628034] [2020-08-18 20:53:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:53:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 20:53:22,776 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 20:53:22,776 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 20:53:22,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 20:53:22,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:53:22 BoogieIcfgContainer [2020-08-18 20:53:22,804 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:53:22,806 INFO L168 Benchmark]: Toolchain (without parser) took 30574.53 ms. Allocated memory was 140.0 MB in the beginning and 621.3 MB in the end (delta: 481.3 MB). Free memory was 102.6 MB in the beginning and 196.5 MB in the end (delta: -93.9 MB). Peak memory consumption was 387.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:53:22,807 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-08-18 20:53:22,808 INFO L168 Benchmark]: CACSL2BoogieTranslator took 691.56 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 102.2 MB in the beginning and 171.3 MB in the end (delta: -69.1 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2020-08-18 20:53:22,809 INFO L168 Benchmark]: Boogie Preprocessor took 82.22 ms. Allocated memory is still 204.5 MB. Free memory was 171.3 MB in the beginning and 167.3 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-08-18 20:53:22,809 INFO L168 Benchmark]: RCFGBuilder took 1133.59 ms. Allocated memory was 204.5 MB in the beginning and 235.4 MB in the end (delta: 30.9 MB). Free memory was 167.3 MB in the beginning and 193.9 MB in the end (delta: -26.6 MB). Peak memory consumption was 81.8 MB. Max. memory is 7.1 GB. [2020-08-18 20:53:22,810 INFO L168 Benchmark]: TraceAbstraction took 28661.88 ms. Allocated memory was 235.4 MB in the beginning and 621.3 MB in the end (delta: 385.9 MB). Free memory was 192.2 MB in the beginning and 196.5 MB in the end (delta: -4.3 MB). Peak memory consumption was 381.6 MB. Max. memory is 7.1 GB. [2020-08-18 20:53:22,814 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 691.56 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 102.2 MB in the beginning and 171.3 MB in the end (delta: -69.1 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 82.22 ms. Allocated memory is still 204.5 MB. Free memory was 171.3 MB in the beginning and 167.3 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1133.59 ms. Allocated memory was 204.5 MB in the beginning and 235.4 MB in the end (delta: 30.9 MB). Free memory was 167.3 MB in the beginning and 193.9 MB in the end (delta: -26.6 MB). Peak memory consumption was 81.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28661.88 ms. Allocated memory was 235.4 MB in the beginning and 621.3 MB in the end (delta: 385.9 MB). Free memory was 192.2 MB in the beginning and 196.5 MB in the end (delta: -4.3 MB). Peak memory consumption was 381.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 704]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L121] int pumpRunning = 0; [L122] int systemActive = 1; [L503] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L773] int cleanupTimeShifts = 4; [L870] int waterLevel = 1; [L871] int methaneLevelCritical = 0; [L846] int retValue_acc ; [L847] int tmp ; [L851] FCALL select_helpers() [L852] FCALL select_features() [L853] CALL, EXPR valid_product() [L738] int retValue_acc ; [L741] retValue_acc = 1 [L742] return (retValue_acc); [L853] RET, EXPR valid_product() [L853] tmp = valid_product() [L855] COND TRUE \read(tmp) [L857] FCALL setup() [L858] CALL runTest() [L840] CALL test() [L46] int splverifierCounter ; [L47] int tmp ; [L48] int tmp___0 ; [L49] int tmp___1 ; [L50] int tmp___2 ; [L53] splverifierCounter = 0 [L55] COND TRUE 1 [L57] COND TRUE splverifierCounter < 4 [L63] tmp = __VERIFIER_nondet_int() [L65] COND TRUE \read(tmp) [L67] CALL waterRise() [L888] COND TRUE waterLevel < 2 [L889] waterLevel = waterLevel + 1 [L67] RET waterRise() [L73] tmp___0 = __VERIFIER_nondet_int() [L75] COND TRUE \read(tmp___0) [L77] CALL changeMethaneLevel() [L900] COND FALSE !(\read(methaneLevelCritical)) [L903] methaneLevelCritical = 1 [L77] RET changeMethaneLevel() [L83] tmp___2 = __VERIFIER_nondet_int() [L85] COND TRUE \read(tmp___2) [L100] CALL timeShift() [L129] COND FALSE !(\read(pumpRunning)) [L136] COND TRUE \read(systemActive) [L138] CALL processEnvironment() [L184] int tmp ; [L187] COND FALSE !(\read(pumpRunning)) [L202] CALL processEnvironment__wrappee__highWaterSensor() [L158] int tmp ; [L161] COND TRUE ! pumpRunning [L163] CALL, EXPR isHighWaterLevel() [L281] int retValue_acc ; [L282] int tmp ; [L283] int tmp___0 ; [L287] CALL, EXPR isHighWaterSensorDry() [L950] int retValue_acc ; [L953] COND FALSE !(waterLevel < 2) [L957] retValue_acc = 0 [L958] return (retValue_acc); [L287] RET, EXPR isHighWaterSensorDry() [L287] tmp = isHighWaterSensorDry() [L289] COND FALSE !(\read(tmp)) [L292] tmp___0 = 1 [L294] retValue_acc = tmp___0 [L295] return (retValue_acc); [L163] RET, EXPR isHighWaterLevel() [L163] tmp = isHighWaterLevel() [L165] COND TRUE \read(tmp) [L167] CALL activatePump() [L212] pumpRunning = 1 [L167] RET activatePump() [L202] RET processEnvironment__wrappee__highWaterSensor() [L138] RET processEnvironment() [L144] CALL __utac_acc__Specification1_spec__1() [L748] int tmp ; [L749] int tmp___0 ; [L753] CALL, EXPR isMethaneLevelCritical() [L909] int retValue_acc ; [L912] retValue_acc = methaneLevelCritical [L913] return (retValue_acc); [L753] RET, EXPR isMethaneLevelCritical() [L753] tmp = isMethaneLevelCritical() [L755] COND TRUE \read(tmp) [L757] CALL, EXPR isPumpRunning() [L236] int retValue_acc ; [L239] retValue_acc = pumpRunning [L240] return (retValue_acc); [L757] RET, EXPR isPumpRunning() [L757] tmp___0 = isPumpRunning() [L759] COND TRUE \read(tmp___0) [L761] CALL __automaton_fail() [L704] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 241 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.5s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 23.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 988 SDtfs, 1945 SDslu, 1023 SDs, 0 SdLazy, 5153 SolverSat, 1209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1579occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 1203 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 598 NumberOfCodeBlocks, 598 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 150744 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...