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_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:39:50,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:39:50,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:39:50,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:39:50,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:39:50,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:39:50,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:39:50,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:39:50,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:39:50,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:39:50,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:39:50,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:39:50,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:39:50,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:39:50,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:39:50,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:39:50,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:39:50,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:39:50,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:39:50,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:39:50,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:39:50,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:39:50,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:39:50,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:39:50,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:39:50,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:39:50,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:39:50,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:39:50,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:39:50,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:39:50,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:39:50,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:39:50,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:39:50,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:39:50,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:39:50,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:39:50,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:39:50,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:39:50,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:39:50,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:39:50,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:39:50,284 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 19:39:50,302 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:39:50,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:39:50,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:39:50,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:39:50,304 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:39:50,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:39:50,304 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:39:50,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:39:50,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:39:50,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:39:50,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:39:50,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:39:50,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:39:50,306 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:39:50,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:39:50,306 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:39:50,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:39:50,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:39:50,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:39:50,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:39:50,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:39:50,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:39:50,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:39:50,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:39:50,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:39:50,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:39:50,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:39:50,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:39:50,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:39:50,602 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:39:50,621 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:39:50,625 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:39:50,626 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:39:50,627 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:39:50,627 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2019-10-13 19:39:50,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50e5daada/3dc1e907563548978f1205f229922232/FLAG689468cc3 [2019-10-13 19:39:51,361 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:39:51,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2019-10-13 19:39:51,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50e5daada/3dc1e907563548978f1205f229922232/FLAG689468cc3 [2019-10-13 19:39:51,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50e5daada/3dc1e907563548978f1205f229922232 [2019-10-13 19:39:51,572 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:39:51,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:39:51,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:39:51,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:39:51,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:39:51,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:39:51" (1/1) ... [2019-10-13 19:39:51,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112cb494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:51, skipping insertion in model container [2019-10-13 19:39:51,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:39:51" (1/1) ... [2019-10-13 19:39:51,590 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:39:51,660 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:39:52,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:39:52,083 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:39:52,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:39:52,264 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:39:52,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:52 WrapperNode [2019-10-13 19:39:52,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:39:52,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:39:52,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:39:52,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:39:52,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:52" (1/1) ... [2019-10-13 19:39:52,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:52" (1/1) ... [2019-10-13 19:39:52,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:52" (1/1) ... [2019-10-13 19:39:52,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:52" (1/1) ... [2019-10-13 19:39:52,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:52" (1/1) ... [2019-10-13 19:39:52,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:52" (1/1) ... [2019-10-13 19:39:52,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:52" (1/1) ... [2019-10-13 19:39:52,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:39:52,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:39:52,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:39:52,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:39:52,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:52" (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 19:39:52,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:39:52,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:39:52,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 19:39:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 19:39:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-13 19:39:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 19:39:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2019-10-13 19:39:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-13 19:39:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-13 19:39:52,431 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-13 19:39:52,431 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-13 19:39:52,431 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-13 19:39:52,431 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-13 19:39:52,431 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-13 19:39:52,431 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-13 19:39:52,432 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2019-10-13 19:39:52,432 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-10-13 19:39:52,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 19:39:52,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 19:39:52,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 19:39:52,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 19:39:52,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 19:39:52,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 19:39:52,433 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 19:39:52,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-10-13 19:39:52,433 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 19:39:52,433 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 19:39:52,434 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 19:39:52,434 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 19:39:52,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:39:52,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 19:39:52,434 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-13 19:39:52,434 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-13 19:39:52,435 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-13 19:39:52,435 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-13 19:39:52,435 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-13 19:39:52,435 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-13 19:39:52,435 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-13 19:39:52,435 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-13 19:39:52,436 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 19:39:52,436 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 19:39:52,436 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 19:39:52,436 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 19:39:52,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:39:52,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:39:52,437 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 19:39:52,437 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-13 19:39:52,437 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-13 19:39:52,440 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-13 19:39:52,441 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-13 19:39:52,441 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-13 19:39:52,441 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 19:39:52,441 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-13 19:39:52,441 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-13 19:39:52,441 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-13 19:39:52,442 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-13 19:39:52,442 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2019-10-13 19:39:52,442 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-10-13 19:39:52,442 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-10-13 19:39:52,442 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-13 19:39:52,442 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-13 19:39:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-13 19:39:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 19:39:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-13 19:39:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2019-10-13 19:39:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-13 19:39:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:39:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 19:39:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 19:39:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 19:39:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 19:39:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 19:39:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 19:39:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:39:52,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 19:39:52,445 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 19:39:52,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:39:52,445 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 19:39:52,445 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 19:39:52,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:39:52,445 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 19:39:52,446 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 19:39:52,446 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 19:39:52,446 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-13 19:39:52,446 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-13 19:39:52,446 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 19:39:52,446 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 19:39:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 19:39:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-13 19:39:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 19:39:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 19:39:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 19:39:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 19:39:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 19:39:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 19:39:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:39:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 19:39:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:39:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 19:39:52,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:39:53,560 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:39:53,560 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 19:39:53,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:39:53 BoogieIcfgContainer [2019-10-13 19:39:53,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:39:53,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:39:53,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:39:53,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:39:53,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:39:51" (1/3) ... [2019-10-13 19:39:53,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30be44e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:39:53, skipping insertion in model container [2019-10-13 19:39:53,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:52" (2/3) ... [2019-10-13 19:39:53,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30be44e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:39:53, skipping insertion in model container [2019-10-13 19:39:53,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:39:53" (3/3) ... [2019-10-13 19:39:53,576 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product56.cil.c [2019-10-13 19:39:53,587 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:39:53,598 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:39:53,609 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:39:53,643 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:39:53,644 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:39:53,644 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:39:53,644 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:39:53,645 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:39:53,645 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:39:53,645 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:39:53,645 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:39:53,672 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2019-10-13 19:39:53,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 19:39:53,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:39:53,684 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 19:39:53,686 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:39:53,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:39:53,691 INFO L82 PathProgramCache]: Analyzing trace with hash -559348317, now seen corresponding path program 1 times [2019-10-13 19:39:53,699 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:39:53,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601435099] [2019-10-13 19:39:53,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:39:53,700 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:39:53,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:39:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:54,429 WARN L191 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-13 19:39:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:54,494 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 19:39:54,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601435099] [2019-10-13 19:39:54,496 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:39:54,496 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:39:54,497 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031315578] [2019-10-13 19:39:54,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:39:54,504 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:39:54,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:39:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:39:54,522 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 3 states. [2019-10-13 19:39:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:39:55,861 INFO L93 Difference]: Finished difference Result 358 states and 464 transitions. [2019-10-13 19:39:55,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:39:55,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-10-13 19:39:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:39:55,886 INFO L225 Difference]: With dead ends: 358 [2019-10-13 19:39:55,887 INFO L226 Difference]: Without dead ends: 193 [2019-10-13 19:39:55,894 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 19:39:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-10-13 19:39:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 156. [2019-10-13 19:39:56,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-13 19:39:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 184 transitions. [2019-10-13 19:39:56,011 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 184 transitions. Word has length 46 [2019-10-13 19:39:56,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:39:56,011 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 184 transitions. [2019-10-13 19:39:56,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:39:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 184 transitions. [2019-10-13 19:39:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 19:39:56,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:39:56,015 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 19:39:56,016 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:39:56,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:39:56,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1620740414, now seen corresponding path program 1 times [2019-10-13 19:39:56,016 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:39:56,017 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274851890] [2019-10-13 19:39:56,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:39:56,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:39:56,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:39:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:56,387 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-13 19:39:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:56,431 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 19:39:56,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274851890] [2019-10-13 19:39:56,432 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:39:56,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:39:56,433 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270205533] [2019-10-13 19:39:56,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:39:56,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:39:56,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:39:56,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:39:56,437 INFO L87 Difference]: Start difference. First operand 156 states and 184 transitions. Second operand 4 states. [2019-10-13 19:39:56,966 WARN L191 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-13 19:39:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:39:57,958 INFO L93 Difference]: Finished difference Result 281 states and 343 transitions. [2019-10-13 19:39:57,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:39:57,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-10-13 19:39:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:39:57,962 INFO L225 Difference]: With dead ends: 281 [2019-10-13 19:39:57,962 INFO L226 Difference]: Without dead ends: 177 [2019-10-13 19:39:57,964 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:39:57,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-10-13 19:39:58,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 147. [2019-10-13 19:39:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-10-13 19:39:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2019-10-13 19:39:58,051 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 47 [2019-10-13 19:39:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:39:58,052 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2019-10-13 19:39:58,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:39:58,052 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2019-10-13 19:39:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 19:39:58,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:39:58,055 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 19:39:58,055 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:39:58,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:39:58,055 INFO L82 PathProgramCache]: Analyzing trace with hash -396868600, now seen corresponding path program 1 times [2019-10-13 19:39:58,056 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:39:58,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737747499] [2019-10-13 19:39:58,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:39:58,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:39:58,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:39:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:58,433 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-13 19:39:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:39:58,569 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 19:39:58,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737747499] [2019-10-13 19:39:58,569 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:39:58,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 19:39:58,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119939607] [2019-10-13 19:39:58,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:39:58,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:39:58,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:39:58,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:39:58,572 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand 8 states. [2019-10-13 19:39:58,999 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:39:59,377 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:39:59,661 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:39:59,926 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:00,775 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-13 19:40:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:40:03,156 INFO L93 Difference]: Finished difference Result 500 states and 619 transitions. [2019-10-13 19:40:03,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:40:03,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2019-10-13 19:40:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:40:03,163 INFO L225 Difference]: With dead ends: 500 [2019-10-13 19:40:03,163 INFO L226 Difference]: Without dead ends: 377 [2019-10-13 19:40:03,165 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:40:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-10-13 19:40:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 308. [2019-10-13 19:40:03,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2019-10-13 19:40:03,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 372 transitions. [2019-10-13 19:40:03,243 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 372 transitions. Word has length 52 [2019-10-13 19:40:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:40:03,244 INFO L462 AbstractCegarLoop]: Abstraction has 308 states and 372 transitions. [2019-10-13 19:40:03,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:40:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 372 transitions. [2019-10-13 19:40:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 19:40:03,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:40:03,247 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 19:40:03,247 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:40:03,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:40:03,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1317156286, now seen corresponding path program 1 times [2019-10-13 19:40:03,247 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:40:03,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732276864] [2019-10-13 19:40:03,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:03,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:03,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:40:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:03,626 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-13 19:40:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:03,787 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 19:40:03,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732276864] [2019-10-13 19:40:03,787 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:40:03,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 19:40:03,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686626761] [2019-10-13 19:40:03,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:40:03,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:40:03,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:40:03,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:40:03,791 INFO L87 Difference]: Start difference. First operand 308 states and 372 transitions. Second operand 12 states. [2019-10-13 19:40:04,412 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:04,749 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:05,020 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:05,349 WARN L191 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:05,940 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-13 19:40:06,906 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:07,361 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:07,737 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:08,033 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-13 19:40:08,377 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:08,821 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:09,285 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:09,753 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:40:12,484 INFO L93 Difference]: Finished difference Result 1257 states and 1722 transitions. [2019-10-13 19:40:12,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 19:40:12,488 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-10-13 19:40:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:40:12,496 INFO L225 Difference]: With dead ends: 1257 [2019-10-13 19:40:12,497 INFO L226 Difference]: Without dead ends: 973 [2019-10-13 19:40:12,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:40:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2019-10-13 19:40:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 872. [2019-10-13 19:40:12,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2019-10-13 19:40:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1114 transitions. [2019-10-13 19:40:12,683 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1114 transitions. Word has length 57 [2019-10-13 19:40:12,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:40:12,683 INFO L462 AbstractCegarLoop]: Abstraction has 872 states and 1114 transitions. [2019-10-13 19:40:12,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:40:12,684 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1114 transitions. [2019-10-13 19:40:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 19:40:12,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:40:12,688 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 19:40:12,688 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:40:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:40:12,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1811637144, now seen corresponding path program 1 times [2019-10-13 19:40:12,689 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:40:12,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345807515] [2019-10-13 19:40:12,690 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:12,690 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:12,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:40:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:13,029 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-13 19:40:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:13,116 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 19:40:13,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345807515] [2019-10-13 19:40:13,117 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:40:13,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:40:13,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106021855] [2019-10-13 19:40:13,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:40:13,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:40:13,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:40:13,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:40:13,119 INFO L87 Difference]: Start difference. First operand 872 states and 1114 transitions. Second operand 6 states. [2019-10-13 19:40:13,451 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:15,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:40:15,626 INFO L93 Difference]: Finished difference Result 2053 states and 2819 transitions. [2019-10-13 19:40:15,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:40:15,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2019-10-13 19:40:15,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:40:15,639 INFO L225 Difference]: With dead ends: 2053 [2019-10-13 19:40:15,639 INFO L226 Difference]: Without dead ends: 1205 [2019-10-13 19:40:15,645 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 19:40:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2019-10-13 19:40:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1114. [2019-10-13 19:40:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1114 states. [2019-10-13 19:40:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1402 transitions. [2019-10-13 19:40:15,986 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1402 transitions. Word has length 61 [2019-10-13 19:40:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:40:15,988 INFO L462 AbstractCegarLoop]: Abstraction has 1114 states and 1402 transitions. [2019-10-13 19:40:15,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:40:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1402 transitions. [2019-10-13 19:40:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 19:40:15,993 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:40:15,994 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 19:40:15,994 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:40:15,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:40:15,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1078445760, now seen corresponding path program 1 times [2019-10-13 19:40:15,995 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:40:15,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056933927] [2019-10-13 19:40:15,996 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:15,996 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:40:15,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:40:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,371 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-13 19:40:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,515 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 19:40:16,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056933927] [2019-10-13 19:40:16,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036793257] [2019-10-13 19:40:16,516 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 19:40:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:40:16,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 19:40:16,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:40:16,949 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 19:40:16,949 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:40:16,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-10-13 19:40:16,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700228659] [2019-10-13 19:40:16,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:40:16,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:40:16,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:40:16,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:40:16,954 INFO L87 Difference]: Start difference. First operand 1114 states and 1402 transitions. Second operand 15 states. [2019-10-13 19:40:17,666 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:18,467 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:19,507 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-13 19:40:20,691 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-13 19:40:21,041 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:22,719 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:23,018 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:23,709 WARN L191 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:24,889 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:25,334 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:25,649 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:25,961 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:26,395 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:26,743 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:27,375 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:27,853 WARN L191 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-13 19:40:28,105 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-13 19:40:28,542 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-13 19:40:29,068 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-13 19:40:29,620 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-13 19:40:29,948 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 190