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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product54.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:21:36,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:21:36,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:21:36,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:21:36,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:21:36,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:21:36,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:21:36,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:21:36,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:21:36,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:21:36,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:21:36,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:21:36,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:21:36,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:21:36,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:21:36,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:21:36,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:21:36,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:21:36,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:21:36,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:21:36,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:21:36,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:21:36,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:21:36,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:21:36,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:21:36,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:21:36,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:21:36,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:21:36,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:21:36,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:21:36,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:21:36,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:21:36,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:21:36,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:21:36,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:21:36,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:21:36,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:21:36,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:21:36,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:21:36,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:21:36,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:21:36,309 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 [2019-10-15 03:21:36,322 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:21:36,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:21:36,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:21:36,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:21:36,324 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:21:36,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:21:36,325 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:21:36,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:21:36,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:21:36,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:21:36,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:21:36,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:21:36,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:21:36,326 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:21:36,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:21:36,326 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:21:36,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:21:36,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:21:36,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:21:36,327 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:21:36,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:21:36,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:21:36,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:21:36,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:21:36,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:21:36,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:21:36,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:21:36,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:21:36,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:21:36,614 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:21:36,627 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:21:36,631 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:21:36,632 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:21:36,632 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:21:36,633 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product54.cil.c [2019-10-15 03:21:36,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31332e323/4ebeb9095ef74b73800a4f2e733e6025/FLAGeeab7ba5f [2019-10-15 03:21:37,264 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:21:37,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product54.cil.c [2019-10-15 03:21:37,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31332e323/4ebeb9095ef74b73800a4f2e733e6025/FLAGeeab7ba5f [2019-10-15 03:21:37,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31332e323/4ebeb9095ef74b73800a4f2e733e6025 [2019-10-15 03:21:37,601 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:21:37,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:21:37,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:21:37,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:21:37,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:21:37,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:21:37" (1/1) ... [2019-10-15 03:21:37,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67269d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:37, skipping insertion in model container [2019-10-15 03:21:37,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:21:37" (1/1) ... [2019-10-15 03:21:37,619 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:21:37,694 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:21:38,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:21:38,189 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:21:38,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:21:38,356 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:21:38,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:38 WrapperNode [2019-10-15 03:21:38,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:21:38,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:21:38,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:21:38,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:21:38,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:38" (1/1) ... [2019-10-15 03:21:38,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:38" (1/1) ... [2019-10-15 03:21:38,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:38" (1/1) ... [2019-10-15 03:21:38,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:38" (1/1) ... [2019-10-15 03:21:38,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:38" (1/1) ... [2019-10-15 03:21:38,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:38" (1/1) ... [2019-10-15 03:21:38,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:38" (1/1) ... [2019-10-15 03:21:38,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:21:38,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:21:38,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:21:38,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:21:38,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:38" (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 [2019-10-15 03:21:38,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:21:38,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:21:38,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 03:21:38,508 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 03:21:38,509 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 03:21:38,509 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-15 03:21:38,510 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-10-15 03:21:38,511 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2019-10-15 03:21:38,511 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-15 03:21:38,511 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-15 03:21:38,511 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-15 03:21:38,512 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-15 03:21:38,512 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-15 03:21:38,512 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-15 03:21:38,513 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-15 03:21:38,513 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-15 03:21:38,515 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-10-15 03:21:38,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-10-15 03:21:38,515 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 03:21:38,516 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 03:21:38,516 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 03:21:38,516 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 03:21:38,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:21:38,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 03:21:38,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 03:21:38,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 03:21:38,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 03:21:38,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 03:21:38,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 03:21:38,519 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-15 03:21:38,519 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-15 03:21:38,520 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-15 03:21:38,520 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-15 03:21:38,520 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-15 03:21:38,520 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-15 03:21:38,520 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-15 03:21:38,521 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-15 03:21:38,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 03:21:38,521 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 03:21:38,521 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 03:21:38,521 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 03:21:38,521 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 03:21:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:21:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:21:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 03:21:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-15 03:21:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-15 03:21:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-10-15 03:21:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 03:21:38,523 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 03:21:38,523 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 03:21:38,523 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-15 03:21:38,523 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-15 03:21:38,523 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-15 03:21:38,523 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-15 03:21:38,523 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-15 03:21:38,524 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-15 03:21:38,524 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-15 03:21:38,524 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-15 03:21:38,524 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-15 03:21:38,525 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-10-15 03:21:38,525 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-15 03:21:38,525 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-15 03:21:38,525 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-15 03:21:38,525 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-10-15 03:21:38,526 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-15 03:21:38,526 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2019-10-15 03:21:38,526 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-15 03:21:38,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:21:38,526 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 03:21:38,526 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-15 03:21:38,526 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 03:21:38,527 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 03:21:38,527 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 03:21:38,528 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 03:21:38,528 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 03:21:38,528 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 03:21:38,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:21:38,529 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 03:21:38,529 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:21:38,530 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:21:38,530 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 03:21:38,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:21:38,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:21:38,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:21:38,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:21:38,530 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 03:21:38,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:21:38,531 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 03:21:38,531 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 03:21:38,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:21:38,531 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 03:21:38,532 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 03:21:38,532 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 03:21:38,532 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 03:21:38,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:21:38,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 03:21:38,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:21:40,133 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:21:40,134 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 03:21:40,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:21:40 BoogieIcfgContainer [2019-10-15 03:21:40,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:21:40,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:21:40,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:21:40,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:21:40,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:21:37" (1/3) ... [2019-10-15 03:21:40,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54879c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:21:40, skipping insertion in model container [2019-10-15 03:21:40,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:38" (2/3) ... [2019-10-15 03:21:40,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54879c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:21:40, skipping insertion in model container [2019-10-15 03:21:40,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:21:40" (3/3) ... [2019-10-15 03:21:40,146 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product54.cil.c [2019-10-15 03:21:40,158 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:21:40,168 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:21:40,180 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:21:40,211 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:21:40,211 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:21:40,211 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:21:40,211 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:21:40,212 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:21:40,212 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:21:40,212 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:21:40,213 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:21:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2019-10-15 03:21:40,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 03:21:40,247 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:40,248 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] [2019-10-15 03:21:40,251 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:40,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:40,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1586789797, now seen corresponding path program 1 times [2019-10-15 03:21:40,267 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:40,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339103794] [2019-10-15 03:21:40,268 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:40,268 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:40,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:21:40,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339103794] [2019-10-15 03:21:40,638 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:21:40,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:21:40,639 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774862629] [2019-10-15 03:21:40,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:21:40,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:40,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:21:40,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:21:40,664 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 2 states. [2019-10-15 03:21:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:40,713 INFO L93 Difference]: Finished difference Result 251 states and 302 transitions. [2019-10-15 03:21:40,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:21:40,714 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2019-10-15 03:21:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:40,730 INFO L225 Difference]: With dead ends: 251 [2019-10-15 03:21:40,730 INFO L226 Difference]: Without dead ends: 126 [2019-10-15 03:21:40,735 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:21:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-15 03:21:40,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2019-10-15 03:21:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-15 03:21:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2019-10-15 03:21:40,798 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 42 [2019-10-15 03:21:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:40,799 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2019-10-15 03:21:40,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:21:40,799 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2019-10-15 03:21:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 03:21:40,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:40,803 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] [2019-10-15 03:21:40,804 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:40,805 INFO L82 PathProgramCache]: Analyzing trace with hash -418881645, now seen corresponding path program 1 times [2019-10-15 03:21:40,805 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:40,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101881825] [2019-10-15 03:21:40,805 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:40,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:40,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:21:40,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101881825] [2019-10-15 03:21:40,979 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:21:40,979 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:21:40,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489744321] [2019-10-15 03:21:40,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:21:40,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:40,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:21:40,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:21:40,984 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand 3 states. [2019-10-15 03:21:41,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:41,040 INFO L93 Difference]: Finished difference Result 205 states and 236 transitions. [2019-10-15 03:21:41,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:21:41,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-10-15 03:21:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:41,044 INFO L225 Difference]: With dead ends: 205 [2019-10-15 03:21:41,045 INFO L226 Difference]: Without dead ends: 118 [2019-10-15 03:21:41,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:21:41,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-15 03:21:41,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-10-15 03:21:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-15 03:21:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2019-10-15 03:21:41,111 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 43 [2019-10-15 03:21:41,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:41,112 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2019-10-15 03:21:41,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:21:41,112 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2019-10-15 03:21:41,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-15 03:21:41,118 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:41,118 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] [2019-10-15 03:21:41,119 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:41,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:41,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1622158275, now seen corresponding path program 1 times [2019-10-15 03:21:41,120 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:41,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733430576] [2019-10-15 03:21:41,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:41,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:41,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:21:41,339 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733430576] [2019-10-15 03:21:41,340 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:21:41,340 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:21:41,340 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57685987] [2019-10-15 03:21:41,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:21:41,341 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:21:41,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:21:41,342 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand 7 states. [2019-10-15 03:21:41,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:41,722 INFO L93 Difference]: Finished difference Result 214 states and 247 transitions. [2019-10-15 03:21:41,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:21:41,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-15 03:21:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:41,726 INFO L225 Difference]: With dead ends: 214 [2019-10-15 03:21:41,727 INFO L226 Difference]: Without dead ends: 118 [2019-10-15 03:21:41,730 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:21:41,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-15 03:21:41,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-10-15 03:21:41,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-15 03:21:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2019-10-15 03:21:41,756 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 46 [2019-10-15 03:21:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:41,757 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2019-10-15 03:21:41,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:21:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2019-10-15 03:21:41,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 03:21:41,762 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:41,762 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, 1, 1] [2019-10-15 03:21:41,762 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:41,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:41,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2035409191, now seen corresponding path program 1 times [2019-10-15 03:21:41,766 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:41,766 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877641225] [2019-10-15 03:21:41,767 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:41,767 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:41,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:21:41,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877641225] [2019-10-15 03:21:41,897 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:21:41,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 03:21:41,897 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915723671] [2019-10-15 03:21:41,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:21:41,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:41,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:21:41,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:21:41,899 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand 5 states. [2019-10-15 03:21:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:42,427 INFO L93 Difference]: Finished difference Result 310 states and 366 transitions. [2019-10-15 03:21:42,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:21:42,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-15 03:21:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:42,434 INFO L225 Difference]: With dead ends: 310 [2019-10-15 03:21:42,434 INFO L226 Difference]: Without dead ends: 214 [2019-10-15 03:21:42,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:21:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-10-15 03:21:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 197. [2019-10-15 03:21:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-10-15 03:21:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 216 transitions. [2019-10-15 03:21:42,483 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 216 transitions. Word has length 63 [2019-10-15 03:21:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:42,483 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 216 transitions. [2019-10-15 03:21:42,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:21:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 216 transitions. [2019-10-15 03:21:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-15 03:21:42,488 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:42,488 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:21:42,488 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:42,489 INFO L82 PathProgramCache]: Analyzing trace with hash -539562389, now seen corresponding path program 1 times [2019-10-15 03:21:42,491 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:42,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419315591] [2019-10-15 03:21:42,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:42,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:42,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:21:42,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419315591] [2019-10-15 03:21:42,643 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:21:42,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-15 03:21:42,643 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370377674] [2019-10-15 03:21:42,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 03:21:42,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:42,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 03:21:42,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:21:42,646 INFO L87 Difference]: Start difference. First operand 197 states and 216 transitions. Second operand 10 states. [2019-10-15 03:21:43,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:43,216 INFO L93 Difference]: Finished difference Result 570 states and 653 transitions. [2019-10-15 03:21:43,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 03:21:43,217 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2019-10-15 03:21:43,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:43,222 INFO L225 Difference]: With dead ends: 570 [2019-10-15 03:21:43,222 INFO L226 Difference]: Without dead ends: 395 [2019-10-15 03:21:43,223 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2019-10-15 03:21:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2019-10-15 03:21:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 381. [2019-10-15 03:21:43,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2019-10-15 03:21:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 424 transitions. [2019-10-15 03:21:43,292 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 424 transitions. Word has length 73 [2019-10-15 03:21:43,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:43,293 INFO L462 AbstractCegarLoop]: Abstraction has 381 states and 424 transitions. [2019-10-15 03:21:43,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 03:21:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 424 transitions. [2019-10-15 03:21:43,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 03:21:43,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:43,297 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:21:43,297 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:43,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:43,297 INFO L82 PathProgramCache]: Analyzing trace with hash 583352494, now seen corresponding path program 1 times [2019-10-15 03:21:43,298 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:43,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106599852] [2019-10-15 03:21:43,298 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:43,298 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:43,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:21:43,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106599852] [2019-10-15 03:21:43,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446528437] [2019-10-15 03:21:43,583 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 [2019-10-15 03:21:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:43,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 03:21:43,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:21:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 03:21:43,998 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:21:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:21:44,439 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:21:44,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8, 9] imperfect sequences [14] total 26 [2019-10-15 03:21:44,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988337540] [2019-10-15 03:21:44,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 03:21:44,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:44,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 03:21:44,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2019-10-15 03:21:44,441 INFO L87 Difference]: Start difference. First operand 381 states and 424 transitions. Second operand 14 states. [2019-10-15 03:21:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:45,377 INFO L93 Difference]: Finished difference Result 914 states and 1022 transitions. [2019-10-15 03:21:45,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 03:21:45,377 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 117 [2019-10-15 03:21:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:45,383 INFO L225 Difference]: With dead ends: 914 [2019-10-15 03:21:45,383 INFO L226 Difference]: Without dead ends: 739 [2019-10-15 03:21:45,385 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2019-10-15 03:21:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2019-10-15 03:21:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 736. [2019-10-15 03:21:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2019-10-15 03:21:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 821 transitions. [2019-10-15 03:21:45,462 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 821 transitions. Word has length 117 [2019-10-15 03:21:45,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:45,464 INFO L462 AbstractCegarLoop]: Abstraction has 736 states and 821 transitions. [2019-10-15 03:21:45,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 03:21:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 821 transitions. [2019-10-15 03:21:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 03:21:45,472 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:45,473 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:21:45,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:21:45,679 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:45,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:45,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1022927765, now seen corresponding path program 1 times [2019-10-15 03:21:45,680 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:45,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213820365] [2019-10-15 03:21:45,680 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:45,681 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:45,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:21:45,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213820365] [2019-10-15 03:21:45,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853745378] [2019-10-15 03:21:45,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:21:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:46,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 03:21:46,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:21:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 03:21:46,295 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:21:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 03:21:46,483 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:21:46,483 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [14] total 19 [2019-10-15 03:21:46,483 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878658839] [2019-10-15 03:21:46,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:21:46,485 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:46,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:21:46,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-10-15 03:21:46,485 INFO L87 Difference]: Start difference. First operand 736 states and 821 transitions. Second operand 7 states. [2019-10-15 03:21:46,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:46,739 INFO L93 Difference]: Finished difference Result 751 states and 837 transitions. [2019-10-15 03:21:46,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 03:21:46,740 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 117 [2019-10-15 03:21:46,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:46,745 INFO L225 Difference]: With dead ends: 751 [2019-10-15 03:21:46,746 INFO L226 Difference]: Without dead ends: 748 [2019-10-15 03:21:46,747 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-15 03:21:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2019-10-15 03:21:46,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 736. [2019-10-15 03:21:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2019-10-15 03:21:46,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 819 transitions. [2019-10-15 03:21:46,795 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 819 transitions. Word has length 117 [2019-10-15 03:21:46,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:46,796 INFO L462 AbstractCegarLoop]: Abstraction has 736 states and 819 transitions. [2019-10-15 03:21:46,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:21:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 819 transitions. [2019-10-15 03:21:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 03:21:46,799 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:46,800 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, 2, 2, 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] [2019-10-15 03:21:47,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:21:47,005 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:47,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:47,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1126573936, now seen corresponding path program 1 times [2019-10-15 03:21:47,006 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:47,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559681664] [2019-10-15 03:21:47,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:47,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:47,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 03:21:47,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559681664] [2019-10-15 03:21:47,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907501464] [2019-10-15 03:21:47,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:21:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:47,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 03:21:47,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:21:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:21:47,403 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:21:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 03:21:47,584 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:21:47,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 3] total 8 [2019-10-15 03:21:47,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5594171] [2019-10-15 03:21:47,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:21:47,586 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:47,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:21:47,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:21:47,586 INFO L87 Difference]: Start difference. First operand 736 states and 819 transitions. Second operand 3 states. [2019-10-15 03:21:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:47,673 INFO L93 Difference]: Finished difference Result 1450 states and 1616 transitions. [2019-10-15 03:21:47,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:21:47,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2019-10-15 03:21:47,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:47,679 INFO L225 Difference]: With dead ends: 1450 [2019-10-15 03:21:47,679 INFO L226 Difference]: Without dead ends: 736 [2019-10-15 03:21:47,681 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 254 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:21:47,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2019-10-15 03:21:47,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 670. [2019-10-15 03:21:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2019-10-15 03:21:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 715 transitions. [2019-10-15 03:21:47,720 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 715 transitions. Word has length 127 [2019-10-15 03:21:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:47,721 INFO L462 AbstractCegarLoop]: Abstraction has 670 states and 715 transitions. [2019-10-15 03:21:47,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:21:47,721 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 715 transitions. [2019-10-15 03:21:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 03:21:47,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:47,724 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, 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] [2019-10-15 03:21:47,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:21:47,930 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:47,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:47,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1528462586, now seen corresponding path program 1 times [2019-10-15 03:21:47,931 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:47,931 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36351742] [2019-10-15 03:21:47,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:47,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:47,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 03:21:48,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36351742] [2019-10-15 03:21:48,156 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:21:48,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2019-10-15 03:21:48,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473228512] [2019-10-15 03:21:48,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 03:21:48,157 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:48,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 03:21:48,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-15 03:21:48,158 INFO L87 Difference]: Start difference. First operand 670 states and 715 transitions. Second operand 14 states. [2019-10-15 03:21:48,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:48,612 INFO L93 Difference]: Finished difference Result 1052 states and 1144 transitions. [2019-10-15 03:21:48,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 03:21:48,613 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 127 [2019-10-15 03:21:48,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:48,618 INFO L225 Difference]: With dead ends: 1052 [2019-10-15 03:21:48,618 INFO L226 Difference]: Without dead ends: 706 [2019-10-15 03:21:48,621 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2019-10-15 03:21:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2019-10-15 03:21:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 660. [2019-10-15 03:21:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2019-10-15 03:21:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 701 transitions. [2019-10-15 03:21:48,662 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 701 transitions. Word has length 127 [2019-10-15 03:21:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:48,663 INFO L462 AbstractCegarLoop]: Abstraction has 660 states and 701 transitions. [2019-10-15 03:21:48,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 03:21:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 701 transitions. [2019-10-15 03:21:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 03:21:48,667 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:48,667 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:21:48,667 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:48,668 INFO L82 PathProgramCache]: Analyzing trace with hash 2106525878, now seen corresponding path program 1 times [2019-10-15 03:21:48,668 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:48,668 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665462385] [2019-10-15 03:21:48,668 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:48,669 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:48,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 03:21:48,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665462385] [2019-10-15 03:21:48,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028127174] [2019-10-15 03:21:48,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:21:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:49,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-15 03:21:49,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:21:49,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:49,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:21:49,497 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:21:50,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:51,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:51,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:51,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 03:21:51,357 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:21:51,357 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14, 13] total 35 [2019-10-15 03:21:51,357 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577827133] [2019-10-15 03:21:51,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 03:21:51,358 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:51,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 03:21:51,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 03:21:51,359 INFO L87 Difference]: Start difference. First operand 660 states and 701 transitions. Second operand 14 states. [2019-10-15 03:21:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:53,522 INFO L93 Difference]: Finished difference Result 1236 states and 1354 transitions. [2019-10-15 03:21:53,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 03:21:53,522 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2019-10-15 03:21:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:53,527 INFO L225 Difference]: With dead ends: 1236 [2019-10-15 03:21:53,527 INFO L226 Difference]: Without dead ends: 820 [2019-10-15 03:21:53,529 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 243 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=2142, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 03:21:53,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2019-10-15 03:21:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 776. [2019-10-15 03:21:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2019-10-15 03:21:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 841 transitions. [2019-10-15 03:21:53,577 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 841 transitions. Word has length 133 [2019-10-15 03:21:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:53,579 INFO L462 AbstractCegarLoop]: Abstraction has 776 states and 841 transitions. [2019-10-15 03:21:53,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 03:21:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 841 transitions. [2019-10-15 03:21:53,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 03:21:53,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:53,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:21:53,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:21:53,788 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:53,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1047856765, now seen corresponding path program 1 times [2019-10-15 03:21:53,789 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:53,789 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435455588] [2019-10-15 03:21:53,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:53,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:53,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 03:21:54,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435455588] [2019-10-15 03:21:54,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025461317] [2019-10-15 03:21:54,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:21:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:54,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 49 conjunts are in the unsatisfiable core [2019-10-15 03:21:54,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:21:54,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:21:54,440 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:21:54,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:54,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:54,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:55,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:55,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:55,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:55,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 03:21:55,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491651951] [2019-10-15 03:21:55,331 INFO L162 IcfgInterpreter]: Started Sifa with 107 locations of interest [2019-10-15 03:21:55,331 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:21:55,338 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:21:55,346 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:21:55,347 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:22:02,835 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 464 [2019-10-15 03:22:04,822 WARN L191 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-10-15 03:22:04,957 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-15 03:22:05,087 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-15 03:22:05,221 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-15 03:22:05,451 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:05,658 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:05,926 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:06,216 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:06,618 WARN L191 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 540 [2019-10-15 03:22:06,822 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:07,044 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:07,229 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:07,407 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:07,538 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:07,546 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 184 for LOIs [2019-10-15 03:22:07,854 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 542 for LOIs [2019-10-15 03:22:07,962 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:08,079 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:08,217 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:08,330 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:08,493 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:08,632 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:08,758 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:08,863 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:09,002 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:09,353 WARN L191 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 542 [2019-10-15 03:22:09,496 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:09,626 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:09,735 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:09,838 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:09,981 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:10,184 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:10,310 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:10,416 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:10,645 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:10,783 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:11,009 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:11,111 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:11,333 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:11,554 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:11,674 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:11,777 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:11,880 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:12,000 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:12,326 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:12,452 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:12,557 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:12,679 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:12,831 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:12,943 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:13,066 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:13,289 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 556 [2019-10-15 03:22:13,406 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:13,557 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:13,669 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:13,781 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:13,901 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:14,048 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-15 03:22:14,186 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-15 03:22:14,345 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-15 03:22:14,590 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-15 03:22:14,705 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 560