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_product49.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:16:53,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:16:53,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:16:53,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:16:53,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:16:53,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:16:53,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:16:53,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:16:53,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:16:53,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:16:53,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:16:53,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:16:53,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:16:53,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:16:53,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:16:53,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:16:53,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:16:53,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:16:53,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:16:53,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:16:53,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:16:53,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:16:53,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:16:53,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:16:53,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:16:53,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:16:53,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:16:53,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:16:53,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:16:53,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:16:53,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:16:53,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:16:53,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:16:53,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:16:53,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:16:53,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:16:53,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:16:53,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:16:53,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:16:53,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:16:53,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:16:53,350 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:16:53,365 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:16:53,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:16:53,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:16:53,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:16:53,367 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:16:53,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:16:53,368 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:16:53,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:16:53,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:16:53,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:16:53,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:16:53,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:16:53,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:16:53,369 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:16:53,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:16:53,369 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:16:53,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:16:53,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:16:53,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:16:53,370 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:16:53,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:16:53,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:16:53,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:16:53,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:16:53,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:16:53,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:16:53,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:16:53,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:16:53,372 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 [2019-10-13 23:16:53,680 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:16:53,693 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:16:53,697 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:16:53,698 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:16:53,699 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:16:53,700 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product49.cil.c [2019-10-13 23:16:53,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a9138ba/8c67e8772b144df09d107acda2e84daf/FLAG15fc2071a [2019-10-13 23:16:54,247 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:16:54,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product49.cil.c [2019-10-13 23:16:54,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a9138ba/8c67e8772b144df09d107acda2e84daf/FLAG15fc2071a [2019-10-13 23:16:54,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a9138ba/8c67e8772b144df09d107acda2e84daf [2019-10-13 23:16:54,593 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:16:54,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:16:54,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:16:54,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:16:54,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:16:54,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:16:54" (1/1) ... [2019-10-13 23:16:54,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bda3564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:54, skipping insertion in model container [2019-10-13 23:16:54,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:16:54" (1/1) ... [2019-10-13 23:16:54,615 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:16:54,678 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:16:55,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:16:55,170 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:16:55,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:16:55,323 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:16:55,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:55 WrapperNode [2019-10-13 23:16:55,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:16:55,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:16:55,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:16:55,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:16:55,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:55" (1/1) ... [2019-10-13 23:16:55,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:55" (1/1) ... [2019-10-13 23:16:55,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:55" (1/1) ... [2019-10-13 23:16:55,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:55" (1/1) ... [2019-10-13 23:16:55,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:55" (1/1) ... [2019-10-13 23:16:55,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:55" (1/1) ... [2019-10-13 23:16:55,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:55" (1/1) ... [2019-10-13 23:16:55,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:16:55,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:16:55,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:16:55,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:16:55,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:16:55,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:16:55,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:16:55,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:16:55,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:16:55,464 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-13 23:16:55,465 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-13 23:16:55,465 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-13 23:16:55,465 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-13 23:16:55,465 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-13 23:16:55,465 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-13 23:16:55,466 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-13 23:16:55,466 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-13 23:16:55,466 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:16:55,466 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:16:55,466 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:16:55,466 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:16:55,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:16:55,467 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:16:55,467 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-13 23:16:55,467 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 23:16:55,467 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-13 23:16:55,467 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-13 23:16:55,468 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-13 23:16:55,468 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-13 23:16:55,468 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-13 23:16:55,468 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-13 23:16:55,468 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-13 23:16:55,468 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-13 23:16:55,469 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:16:55,469 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:16:55,469 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:16:55,469 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:16:55,469 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:16:55,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-10-13 23:16:55,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:16:55,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:16:55,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:16:55,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:16:55,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:16:55,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:16:55,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:16:55,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:16:55,471 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:16:55,471 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:16:55,471 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-13 23:16:55,471 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-13 23:16:55,472 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-13 23:16:55,472 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-13 23:16:55,472 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-13 23:16:55,472 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-13 23:16:55,472 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-13 23:16:55,472 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-13 23:16:55,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:16:55,473 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:16:55,473 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:16:55,473 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-13 23:16:55,473 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:16:55,473 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:16:55,474 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:16:55,474 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:16:55,474 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:16:55,474 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:16:55,474 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:16:55,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:16:55,475 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-13 23:16:55,475 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-13 23:16:55,475 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-13 23:16:55,475 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-10-13 23:16:55,475 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-13 23:16:55,475 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-13 23:16:55,476 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-13 23:16:55,476 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 23:16:55,476 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-13 23:16:55,476 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-13 23:16:55,476 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:16:55,476 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:16:55,477 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:16:55,477 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:16:55,477 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:16:55,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:16:55,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:16:55,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:16:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:16:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:16:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:16:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:16:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:16:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:16:55,479 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:16:55,479 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:16:55,479 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:16:55,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:16:55,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:16:55,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:16:57,051 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:16:57,052 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 23:16:57,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:16:57 BoogieIcfgContainer [2019-10-13 23:16:57,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:16:57,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:16:57,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:16:57,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:16:57,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:16:54" (1/3) ... [2019-10-13 23:16:57,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7735b013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:16:57, skipping insertion in model container [2019-10-13 23:16:57,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:55" (2/3) ... [2019-10-13 23:16:57,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7735b013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:16:57, skipping insertion in model container [2019-10-13 23:16:57,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:16:57" (3/3) ... [2019-10-13 23:16:57,064 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product49.cil.c [2019-10-13 23:16:57,073 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:16:57,084 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:16:57,095 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:16:57,129 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:16:57,129 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:16:57,129 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:16:57,129 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:16:57,130 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:16:57,130 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:16:57,130 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:16:57,130 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:16:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states. [2019-10-13 23:16:57,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 23:16:57,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:16:57,163 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] [2019-10-13 23:16:57,165 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:16:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:16:57,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1149268172, now seen corresponding path program 1 times [2019-10-13 23:16:57,181 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:16:57,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086652340] [2019-10-13 23:16:57,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:16:57,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:16:57,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:16:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:16:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:16:57,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086652340] [2019-10-13 23:16:57,527 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:16:57,530 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:16:57,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896591391] [2019-10-13 23:16:57,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:16:57,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:16:57,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:16:57,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:16:57,558 INFO L87 Difference]: Start difference. First operand 139 states. Second operand 2 states. [2019-10-13 23:16:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:16:57,612 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2019-10-13 23:16:57,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:16:57,619 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2019-10-13 23:16:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:16:57,634 INFO L225 Difference]: With dead ends: 211 [2019-10-13 23:16:57,635 INFO L226 Difference]: Without dead ends: 106 [2019-10-13 23:16:57,642 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 [2019-10-13 23:16:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-13 23:16:57,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-10-13 23:16:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-13 23:16:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2019-10-13 23:16:57,703 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 42 [2019-10-13 23:16:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:16:57,704 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2019-10-13 23:16:57,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:16:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2019-10-13 23:16:57,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 23:16:57,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:16:57,708 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] [2019-10-13 23:16:57,709 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:16:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:16:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash 654621316, now seen corresponding path program 1 times [2019-10-13 23:16:57,710 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:16:57,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714464260] [2019-10-13 23:16:57,710 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:16:57,710 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:16:57,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:16:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:16:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:16:57,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714464260] [2019-10-13 23:16:57,861 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:16:57,861 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:16:57,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991541900] [2019-10-13 23:16:57,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:16:57,864 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:16:57,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:16:57,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:16:57,865 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand 3 states. [2019-10-13 23:16:57,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:16:57,903 INFO L93 Difference]: Finished difference Result 169 states and 191 transitions. [2019-10-13 23:16:57,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:16:57,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-10-13 23:16:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:16:57,909 INFO L225 Difference]: With dead ends: 169 [2019-10-13 23:16:57,909 INFO L226 Difference]: Without dead ends: 98 [2019-10-13 23:16:57,910 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 [2019-10-13 23:16:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-13 23:16:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-10-13 23:16:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-13 23:16:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2019-10-13 23:16:57,937 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 43 [2019-10-13 23:16:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:16:57,937 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2019-10-13 23:16:57,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:16:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2019-10-13 23:16:57,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 23:16:57,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:16:57,944 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] [2019-10-13 23:16:57,944 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:16:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:16:57,945 INFO L82 PathProgramCache]: Analyzing trace with hash 977683427, now seen corresponding path program 1 times [2019-10-13 23:16:57,945 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:16:57,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618937986] [2019-10-13 23:16:57,947 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:16:57,947 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:16:57,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:16:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:16:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:16:58,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618937986] [2019-10-13 23:16:58,161 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:16:58,161 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:16:58,161 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092995807] [2019-10-13 23:16:58,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:16:58,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:16:58,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:16:58,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:16:58,163 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 7 states. [2019-10-13 23:16:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:16:58,452 INFO L93 Difference]: Finished difference Result 174 states and 197 transitions. [2019-10-13 23:16:58,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:16:58,453 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2019-10-13 23:16:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:16:58,455 INFO L225 Difference]: With dead ends: 174 [2019-10-13 23:16:58,455 INFO L226 Difference]: Without dead ends: 98 [2019-10-13 23:16:58,456 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:16:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-13 23:16:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-10-13 23:16:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-13 23:16:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2019-10-13 23:16:58,468 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 45 [2019-10-13 23:16:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:16:58,468 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2019-10-13 23:16:58,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:16:58,468 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2019-10-13 23:16:58,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 23:16:58,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:16:58,471 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] [2019-10-13 23:16:58,471 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:16:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:16:58,472 INFO L82 PathProgramCache]: Analyzing trace with hash 430177031, now seen corresponding path program 1 times [2019-10-13 23:16:58,472 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:16:58,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345776743] [2019-10-13 23:16:58,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:16:58,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:16:58,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:16:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:16:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:16:58,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345776743] [2019-10-13 23:16:58,603 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:16:58,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:16:58,604 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229176370] [2019-10-13 23:16:58,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:16:58,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:16:58,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:16:58,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:16:58,605 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 5 states. [2019-10-13 23:16:59,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:16:59,105 INFO L93 Difference]: Finished difference Result 256 states and 297 transitions. [2019-10-13 23:16:59,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:16:59,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2019-10-13 23:16:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:16:59,111 INFO L225 Difference]: With dead ends: 256 [2019-10-13 23:16:59,111 INFO L226 Difference]: Without dead ends: 180 [2019-10-13 23:16:59,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:16:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-10-13 23:16:59,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 165. [2019-10-13 23:16:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-10-13 23:16:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 180 transitions. [2019-10-13 23:16:59,156 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 180 transitions. Word has length 58 [2019-10-13 23:16:59,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:16:59,158 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 180 transitions. [2019-10-13 23:16:59,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:16:59,159 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 180 transitions. [2019-10-13 23:16:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-13 23:16:59,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:16:59,162 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] [2019-10-13 23:16:59,162 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:16:59,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:16:59,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2054095039, now seen corresponding path program 1 times [2019-10-13 23:16:59,163 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:16:59,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564053906] [2019-10-13 23:16:59,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:16:59,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:16:59,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:16:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:16:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:16:59,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564053906] [2019-10-13 23:16:59,337 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:16:59,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 23:16:59,337 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077876936] [2019-10-13 23:16:59,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:16:59,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:16:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:16:59,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:16:59,341 INFO L87 Difference]: Start difference. First operand 165 states and 180 transitions. Second operand 10 states. [2019-10-13 23:16:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:16:59,810 INFO L93 Difference]: Finished difference Result 476 states and 547 transitions. [2019-10-13 23:16:59,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 23:16:59,812 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2019-10-13 23:16:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:16:59,817 INFO L225 Difference]: With dead ends: 476 [2019-10-13 23:16:59,818 INFO L226 Difference]: Without dead ends: 333 [2019-10-13 23:16:59,819 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 [2019-10-13 23:16:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2019-10-13 23:16:59,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 319. [2019-10-13 23:16:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-10-13 23:16:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 354 transitions. [2019-10-13 23:16:59,864 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 354 transitions. Word has length 67 [2019-10-13 23:16:59,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:16:59,865 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 354 transitions. [2019-10-13 23:16:59,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:16:59,865 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 354 transitions. [2019-10-13 23:16:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 23:16:59,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:16:59,868 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:16:59,868 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:16:59,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:16:59,868 INFO L82 PathProgramCache]: Analyzing trace with hash -630307274, now seen corresponding path program 1 times [2019-10-13 23:16:59,869 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:16:59,869 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038680832] [2019-10-13 23:16:59,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:16:59,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:16:59,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:16:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:17:00,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038680832] [2019-10-13 23:17:00,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291194350] [2019-10-13 23:17:00,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:00,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 23:17:00,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:17:00,521 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:17:00,739 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:17:00,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [14] total 19 [2019-10-13 23:17:00,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127435939] [2019-10-13 23:17:00,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:17:00,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:17:00,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-10-13 23:17:00,743 INFO L87 Difference]: Start difference. First operand 319 states and 354 transitions. Second operand 7 states. [2019-10-13 23:17:01,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:01,033 INFO L93 Difference]: Finished difference Result 328 states and 363 transitions. [2019-10-13 23:17:01,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:17:01,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2019-10-13 23:17:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:01,037 INFO L225 Difference]: With dead ends: 328 [2019-10-13 23:17:01,037 INFO L226 Difference]: Without dead ends: 325 [2019-10-13 23:17:01,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-13 23:17:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-10-13 23:17:01,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 319. [2019-10-13 23:17:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-10-13 23:17:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 353 transitions. [2019-10-13 23:17:01,063 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 353 transitions. Word has length 110 [2019-10-13 23:17:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:01,063 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 353 transitions. [2019-10-13 23:17:01,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:17:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 353 transitions. [2019-10-13 23:17:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 23:17:01,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:01,066 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:17:01,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:01,271 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1229356785, now seen corresponding path program 1 times [2019-10-13 23:17:01,272 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:01,272 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180720928] [2019-10-13 23:17:01,273 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:01,273 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:01,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:17:01,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180720928] [2019-10-13 23:17:01,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55028368] [2019-10-13 23:17:01,613 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 [2019-10-13 23:17:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:01,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 23:17:01,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:01,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:01,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:02,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:02,183 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:02,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:02,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:02,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:03,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:03,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:03,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:17:03,806 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:17:03,806 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14, 12] total 34 [2019-10-13 23:17:03,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502602437] [2019-10-13 23:17:03,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 23:17:03,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:03,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 23:17:03,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 23:17:03,808 INFO L87 Difference]: Start difference. First operand 319 states and 353 transitions. Second operand 12 states. [2019-10-13 23:17:05,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:05,687 INFO L93 Difference]: Finished difference Result 701 states and 800 transitions. [2019-10-13 23:17:05,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 23:17:05,688 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 115 [2019-10-13 23:17:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:05,691 INFO L225 Difference]: With dead ends: 701 [2019-10-13 23:17:05,691 INFO L226 Difference]: Without dead ends: 404 [2019-10-13 23:17:05,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 207 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=397, Invalid=2053, Unknown=0, NotChecked=0, Total=2450 [2019-10-13 23:17:05,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2019-10-13 23:17:05,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 397. [2019-10-13 23:17:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2019-10-13 23:17:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 441 transitions. [2019-10-13 23:17:05,721 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 441 transitions. Word has length 115 [2019-10-13 23:17:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:05,721 INFO L462 AbstractCegarLoop]: Abstraction has 397 states and 441 transitions. [2019-10-13 23:17:05,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 23:17:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 441 transitions. [2019-10-13 23:17:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 23:17:05,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:05,724 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:17:05,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:05,929 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:05,930 INFO L82 PathProgramCache]: Analyzing trace with hash 332153777, now seen corresponding path program 1 times [2019-10-13 23:17:05,930 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:05,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958531038] [2019-10-13 23:17:05,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:05,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:05,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:17:06,129 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958531038] [2019-10-13 23:17:06,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823792029] [2019-10-13 23:17:06,130 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 [2019-10-13 23:17:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:06,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 56 conjunts are in the unsatisfiable core [2019-10-13 23:17:06,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:17:06,533 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:06,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:06,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:06,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:07,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:07,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:07,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:07,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:07,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 23:17:07,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139014245] [2019-10-13 23:17:07,597 INFO L162 IcfgInterpreter]: Started Sifa with 91 locations of interest [2019-10-13 23:17:07,598 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:17:07,603 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:17:07,611 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:17:07,611 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:17:15,642 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 464 [2019-10-13 23:17:17,277 WARN L191 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-10-13 23:17:17,413 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-13 23:17:17,540 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-13 23:17:17,706 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-13 23:17:17,938 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:18,116 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:18,331 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:18,577 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:18,892 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 540 [2019-10-13 23:17:19,027 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:19,201 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:19,337 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:19,454 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:19,566 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 184 for LOIs [2019-10-13 23:17:19,844 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 509 [2019-10-13 23:17:19,845 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 544 for LOIs [2019-10-13 23:17:19,949 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:20,170 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:20,418 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:20,587 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:20,908 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:21,129 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 544 [2019-10-13 23:17:21,779 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:22,487 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:22,599 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:23,239 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:24,053 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:24,168 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:24,297 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:24,398 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:24,510 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:24,831 WARN L191 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 552 [2019-10-13 23:17:24,969 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:25,122 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:25,224 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:25,326 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:25,436 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:25,566 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:25,674 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:25,790 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:26,005 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 556 [2019-10-13 23:17:26,121 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:26,375 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:26,542 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:26,647 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:26,759 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:26,870 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 561 [2019-10-13 23:17:26,976 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 561 [2019-10-13 23:17:27,093 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 561 [2019-10-13 23:17:27,229 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:27,336 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:27,454 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:27,586 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:27,693 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:27,811 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:27,921 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:28,027 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:28,282 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:28,522 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:28,647 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:28,761 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:29,186 WARN L191 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 552 [2019-10-13 23:17:29,329 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:29,466 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:29,652 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 552 [2019-10-13 23:17:29,755 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:29,895 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:30,006 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:30,109 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:30,219 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:30,421 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 554 [2019-10-13 23:17:30,524 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 554 [2019-10-13 23:17:30,639 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:31,067 WARN L191 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 554 [2019-10-13 23:17:31,342 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 554 [2019-10-13 23:17:31,506 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:31,694 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 554 [2019-10-13 23:17:31,797 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 554 [2019-10-13 23:17:31,913 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:32,139 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 561 [2019-10-13 23:17:32,252 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 561 [2019-10-13 23:17:32,378 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 561 [2019-10-13 23:17:32,587 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 565 DAG size of output: 563 [2019-10-13 23:17:32,694 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:32,823 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 563