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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product60.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:40:05,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:40:05,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:40:05,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:40:05,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:40:05,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:40:05,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:40:05,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:40:05,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:40:05,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:40:05,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:40:05,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:40:05,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:40:05,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:40:05,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:40:05,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:40:05,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:40:05,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:40:05,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:40:05,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:40:05,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:40:05,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:40:05,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:40:05,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:40:05,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:40:05,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:40:05,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:40:05,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:40:05,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:40:05,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:40:05,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:40:05,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:40:05,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:40:05,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:40:05,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:40:05,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:40:05,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:40:05,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:40:05,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:40:05,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:40:05,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:40:05,178 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 19:40:05,197 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:40:05,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:40:05,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:40:05,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:40:05,200 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:40:05,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:40:05,200 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:40:05,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:40:05,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:40:05,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:40:05,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:40:05,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:40:05,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:40:05,203 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:40:05,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:40:05,203 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:40:05,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:40:05,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:40:05,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:40:05,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:40:05,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:40:05,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:40:05,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:40:05,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:40:05,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:40:05,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:40:05,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:40:05,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:40:05,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:40:05,465 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:40:05,477 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:40:05,480 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:40:05,482 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:40:05,482 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:40:05,483 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product60.cil.c [2019-10-13 19:40:05,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77abc749d/cef165ed160f4531a4dd614c14149e5d/FLAGe15ad5030 [2019-10-13 19:40:06,022 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:40:06,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product60.cil.c [2019-10-13 19:40:06,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77abc749d/cef165ed160f4531a4dd614c14149e5d/FLAGe15ad5030 [2019-10-13 19:40:06,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77abc749d/cef165ed160f4531a4dd614c14149e5d [2019-10-13 19:40:06,395 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:40:06,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:40:06,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:40:06,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:40:06,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:40:06,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:40:06" (1/1) ... [2019-10-13 19:40:06,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4694530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:06, skipping insertion in model container [2019-10-13 19:40:06,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:40:06" (1/1) ... [2019-10-13 19:40:06,412 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:40:06,477 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:40:06,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:40:06,966 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:40:07,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:40:07,074 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:40:07,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:07 WrapperNode [2019-10-13 19:40:07,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:40:07,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:40:07,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:40:07,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:40:07,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:07" (1/1) ... [2019-10-13 19:40:07,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:07" (1/1) ... [2019-10-13 19:40:07,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:07" (1/1) ... [2019-10-13 19:40:07,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:07" (1/1) ... [2019-10-13 19:40:07,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:07" (1/1) ... [2019-10-13 19:40:07,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:07" (1/1) ... [2019-10-13 19:40:07,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:07" (1/1) ... [2019-10-13 19:40:07,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:40:07,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:40:07,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:40:07,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:40:07,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-10-13 19:40:07,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:40:07,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:40:07,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 19:40:07,211 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 19:40:07,211 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 19:40:07,212 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 19:40:07,212 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 19:40:07,213 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 19:40:07,213 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 19:40:07,213 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 19:40:07,213 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 19:40:07,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:40:07,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 19:40:07,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 19:40:07,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 19:40:07,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 19:40:07,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 19:40:07,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 19:40:07,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-10-13 19:40:07,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 19:40:07,215 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 19:40:07,215 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-13 19:40:07,215 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 19:40:07,215 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-13 19:40:07,215 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2019-10-13 19:40:07,215 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-13 19:40:07,216 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-13 19:40:07,216 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-13 19:40:07,216 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-13 19:40:07,216 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-13 19:40:07,216 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-13 19:40:07,217 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-13 19:40:07,217 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2019-10-13 19:40:07,217 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-10-13 19:40:07,217 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 19:40:07,217 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-13 19:40:07,217 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-13 19:40:07,217 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-13 19:40:07,218 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-13 19:40:07,218 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-13 19:40:07,218 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-13 19:40:07,218 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-13 19:40:07,218 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-13 19:40:07,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:40:07,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:40:07,219 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 19:40:07,219 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 19:40:07,219 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 19:40:07,219 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 19:40:07,219 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 19:40:07,220 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 19:40:07,220 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 19:40:07,220 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-13 19:40:07,220 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-13 19:40:07,220 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-13 19:40:07,220 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 19:40:07,220 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 19:40:07,221 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 19:40:07,221 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 19:40:07,221 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:40:07,221 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 19:40:07,221 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 19:40:07,221 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 19:40:07,221 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 19:40:07,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 19:40:07,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 19:40:07,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:40:07,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 19:40:07,222 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 19:40:07,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:40:07,223 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 19:40:07,223 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 19:40:07,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:40:07,223 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 19:40:07,223 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 19:40:07,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:40:07,224 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 19:40:07,224 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 19:40:07,224 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-13 19:40:07,224 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-13 19:40:07,224 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-10-13 19:40:07,224 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-13 19:40:07,224 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-13 19:40:07,225 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-13 19:40:07,225 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-13 19:40:07,225 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-13 19:40:07,225 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-13 19:40:07,225 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-13 19:40:07,225 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2019-10-13 19:40:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-10-13 19:40:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-13 19:40:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-13 19:40:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-13 19:40:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 19:40:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-13 19:40:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2019-10-13 19:40:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-13 19:40:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:40:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 19:40:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:40:08,250 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:40:08,251 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 19:40:08,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:40:08 BoogieIcfgContainer [2019-10-13 19:40:08,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:40:08,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:40:08,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:40:08,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:40:08,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:40:06" (1/3) ... [2019-10-13 19:40:08,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3673908a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:40:08, skipping insertion in model container [2019-10-13 19:40:08,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:07" (2/3) ... [2019-10-13 19:40:08,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3673908a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:40:08, skipping insertion in model container [2019-10-13 19:40:08,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:40:08" (3/3) ... [2019-10-13 19:40:08,261 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product60.cil.c [2019-10-13 19:40:08,271 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:40:08,279 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:40:08,291 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:40:08,318 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:40:08,318 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:40:08,318 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:40:08,318 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:40:08,319 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:40:08,319 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:40:08,319 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:40:08,319 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:40:08,345 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states. [2019-10-13 19:40:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 19:40:08,359 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:40:08,360 INFO L380 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] [2019-10-13 19:40:08,363 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:40:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:40:08,368 INFO L82 PathProgramCache]: Analyzing trace with hash 2134554421, now seen corresponding path program 1 times [2019-10-13 19:40:08,377 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:40:08,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303730580] [2019-10-13 19:40:08,378 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:08,378 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:08,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:40:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:09,066 WARN L191 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-13 19:40:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:40:09,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303730580] [2019-10-13 19:40:09,131 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:40:09,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:40:09,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72687473] [2019-10-13 19:40:09,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:40:09,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:40:09,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:40:09,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:40:09,158 INFO L87 Difference]: Start difference. First operand 196 states. Second operand 3 states. [2019-10-13 19:40:10,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:40:10,381 INFO L93 Difference]: Finished difference Result 352 states and 451 transitions. [2019-10-13 19:40:10,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:40:10,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-10-13 19:40:10,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:40:10,403 INFO L225 Difference]: With dead ends: 352 [2019-10-13 19:40:10,403 INFO L226 Difference]: Without dead ends: 190 [2019-10-13 19:40:10,411 INFO L600 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 [2019-10-13 19:40:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-10-13 19:40:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 153. [2019-10-13 19:40:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-10-13 19:40:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 178 transitions. [2019-10-13 19:40:10,551 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 178 transitions. Word has length 46 [2019-10-13 19:40:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:40:10,552 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 178 transitions. [2019-10-13 19:40:10,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:40:10,553 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 178 transitions. [2019-10-13 19:40:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 19:40:10,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:40:10,563 INFO L380 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] [2019-10-13 19:40:10,563 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:40:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:40:10,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1258335028, now seen corresponding path program 1 times [2019-10-13 19:40:10,565 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:40:10,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830490724] [2019-10-13 19:40:10,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:10,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:10,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:40:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:10,929 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-13 19:40:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:40:10,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830490724] [2019-10-13 19:40:10,963 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:40:10,964 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:40:10,964 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250706071] [2019-10-13 19:40:10,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:40:10,966 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:40:10,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:40:10,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:40:10,967 INFO L87 Difference]: Start difference. First operand 153 states and 178 transitions. Second operand 4 states. [2019-10-13 19:40:11,448 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-13 19:40:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:40:12,347 INFO L93 Difference]: Finished difference Result 275 states and 330 transitions. [2019-10-13 19:40:12,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:40:12,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-10-13 19:40:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:40:12,350 INFO L225 Difference]: With dead ends: 275 [2019-10-13 19:40:12,350 INFO L226 Difference]: Without dead ends: 174 [2019-10-13 19:40:12,352 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:40:12,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-10-13 19:40:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 144. [2019-10-13 19:40:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-10-13 19:40:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 166 transitions. [2019-10-13 19:40:12,411 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 166 transitions. Word has length 47 [2019-10-13 19:40:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:40:12,411 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 166 transitions. [2019-10-13 19:40:12,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:40:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 166 transitions. [2019-10-13 19:40:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 19:40:12,416 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:40:12,416 INFO L380 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] [2019-10-13 19:40:12,416 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:40:12,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:40:12,417 INFO L82 PathProgramCache]: Analyzing trace with hash 598975815, now seen corresponding path program 1 times [2019-10-13 19:40:12,417 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:40:12,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340405058] [2019-10-13 19:40:12,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:12,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:12,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:40:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:12,815 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-13 19:40:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:40:12,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340405058] [2019-10-13 19:40:12,930 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:40:12,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 19:40:12,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205144319] [2019-10-13 19:40:12,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:40:12,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:40:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:40:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:40:12,932 INFO L87 Difference]: Start difference. First operand 144 states and 166 transitions. Second operand 8 states. [2019-10-13 19:40:13,379 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:13,729 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:13,983 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:14,256 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:15,043 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-13 19:40:17,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:40:17,168 INFO L93 Difference]: Finished difference Result 491 states and 599 transitions. [2019-10-13 19:40:17,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:40:17,169 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2019-10-13 19:40:17,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:40:17,173 INFO L225 Difference]: With dead ends: 491 [2019-10-13 19:40:17,173 INFO L226 Difference]: Without dead ends: 371 [2019-10-13 19:40:17,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:40:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2019-10-13 19:40:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 302. [2019-10-13 19:40:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2019-10-13 19:40:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 360 transitions. [2019-10-13 19:40:17,247 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 360 transitions. Word has length 52 [2019-10-13 19:40:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:40:17,248 INFO L462 AbstractCegarLoop]: Abstraction has 302 states and 360 transitions. [2019-10-13 19:40:17,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:40:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 360 transitions. [2019-10-13 19:40:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 19:40:17,250 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:40:17,250 INFO L380 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] [2019-10-13 19:40:17,250 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:40:17,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:40:17,251 INFO L82 PathProgramCache]: Analyzing trace with hash 301540465, now seen corresponding path program 1 times [2019-10-13 19:40:17,251 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:40:17,251 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072009683] [2019-10-13 19:40:17,251 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:17,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:17,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:40:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:17,572 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-13 19:40:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:40:17,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072009683] [2019-10-13 19:40:17,694 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:40:17,694 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 19:40:17,694 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600126400] [2019-10-13 19:40:17,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:40:17,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:40:17,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:40:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:40:17,697 INFO L87 Difference]: Start difference. First operand 302 states and 360 transitions. Second operand 12 states. [2019-10-13 19:40:18,288 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:18,642 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:18,916 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:19,176 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:19,759 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-13 19:40:20,673 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:21,147 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:21,464 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:21,765 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-13 19:40:22,109 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:22,476 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:22,864 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:23,259 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:40:25,457 INFO L93 Difference]: Finished difference Result 1233 states and 1656 transitions. [2019-10-13 19:40:25,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 19:40:25,458 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-10-13 19:40:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:40:25,466 INFO L225 Difference]: With dead ends: 1233 [2019-10-13 19:40:25,466 INFO L226 Difference]: Without dead ends: 955 [2019-10-13 19:40:25,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:40:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2019-10-13 19:40:25,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 854. [2019-10-13 19:40:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 854 states. [2019-10-13 19:40:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1066 transitions. [2019-10-13 19:40:25,679 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1066 transitions. Word has length 57 [2019-10-13 19:40:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:40:25,680 INFO L462 AbstractCegarLoop]: Abstraction has 854 states and 1066 transitions. [2019-10-13 19:40:25,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:40:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1066 transitions. [2019-10-13 19:40:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 19:40:25,683 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:40:25,683 INFO L380 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] [2019-10-13 19:40:25,683 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:40:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:40:25,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1216503305, now seen corresponding path program 1 times [2019-10-13 19:40:25,684 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:40:25,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103041187] [2019-10-13 19:40:25,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:25,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:25,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:40:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:25,968 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-13 19:40:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:40:26,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103041187] [2019-10-13 19:40:26,044 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:40:26,044 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:40:26,044 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849411627] [2019-10-13 19:40:26,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:40:26,046 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:40:26,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:40:26,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:40:26,047 INFO L87 Difference]: Start difference. First operand 854 states and 1066 transitions. Second operand 6 states. [2019-10-13 19:40:26,381 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:40:28,325 INFO L93 Difference]: Finished difference Result 2019 states and 2693 transitions. [2019-10-13 19:40:28,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:40:28,325 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2019-10-13 19:40:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:40:28,335 INFO L225 Difference]: With dead ends: 2019 [2019-10-13 19:40:28,335 INFO L226 Difference]: Without dead ends: 1189 [2019-10-13 19:40:28,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:40:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2019-10-13 19:40:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1098. [2019-10-13 19:40:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1098 states. [2019-10-13 19:40:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1364 transitions. [2019-10-13 19:40:28,605 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1364 transitions. Word has length 61 [2019-10-13 19:40:28,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:40:28,605 INFO L462 AbstractCegarLoop]: Abstraction has 1098 states and 1364 transitions. [2019-10-13 19:40:28,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:40:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1364 transitions. [2019-10-13 19:40:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 19:40:28,608 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:40:28,609 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:40:28,609 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:40:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:40:28,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1663970326, now seen corresponding path program 1 times [2019-10-13 19:40:28,610 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:40:28,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432938793] [2019-10-13 19:40:28,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:28,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:28,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:40:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:28,903 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-13 19:40:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 19:40:29,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432938793] [2019-10-13 19:40:29,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352885634] [2019-10-13 19:40:29,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:40:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:29,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 19:40:29,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:40:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:40:29,389 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:40:29,389 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-10-13 19:40:29,389 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385577145] [2019-10-13 19:40:29,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:40:29,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:40:29,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:40:29,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:40:29,391 INFO L87 Difference]: Start difference. First operand 1098 states and 1364 transitions. Second operand 15 states. [2019-10-13 19:40:30,105 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:30,888 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:31,736 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-13 19:40:33,352 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-13 19:40:33,807 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:35,345 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:35,648 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:36,072 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:37,202 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:37,525 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:37,815 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:38,133 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:38,414 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:38,776 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:39,100 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:39,420 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:39,683 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-13 19:40:40,177 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-13 19:40:40,852 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:41,600 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:41,897 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:42,189 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:42,744 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:43,057 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:43,315 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:43,602 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:43,928 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-13 19:40:44,641 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-13 19:40:44,965 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:45,303 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-10-13 19:40:45,615 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-10-13 19:40:45,889 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 191