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_product62.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:21:45,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:21:45,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:21:45,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:21:45,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:21:45,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:21:45,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:21:45,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:21:45,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:21:45,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:21:45,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:21:45,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:21:45,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:21:45,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:21:45,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:21:45,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:21:45,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:21:45,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:21:45,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:21:45,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:21:45,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:21:45,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:21:45,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:21:45,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:21:45,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:21:45,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:21:45,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:21:45,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:21:45,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:21:45,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:21:45,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:21:45,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:21:45,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:21:45,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:21:45,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:21:45,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:21:45,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:21:45,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:21:45,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:21:45,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:21:45,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:21:45,621 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 03:21:45,644 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:21:45,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:21:45,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:21:45,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:21:45,647 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:21:45,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:21:45,647 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:21:45,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:21:45,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:21:45,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:21:45,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:21:45,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:21:45,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:21:45,650 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:21:45,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:21:45,650 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:21:45,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:21:45,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:21:45,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:21:45,651 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:21:45,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:21:45,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:21:45,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:21:45,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:21:45,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:21:45,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:21:45,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:21:45,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:21:45,653 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 03:21:45,967 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:21:45,988 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:21:45,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:21:45,993 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:21:45,994 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:21:45,994 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product62.cil.c [2019-10-15 03:21:46,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9025ba0dc/32e9ece727134863b67e7989e95e9c8d/FLAG017080c99 [2019-10-15 03:21:46,619 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:21:46,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product62.cil.c [2019-10-15 03:21:46,631 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9025ba0dc/32e9ece727134863b67e7989e95e9c8d/FLAG017080c99 [2019-10-15 03:21:46,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9025ba0dc/32e9ece727134863b67e7989e95e9c8d [2019-10-15 03:21:46,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:21:46,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:21:46,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:21:46,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:21:46,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:21:46,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:21:46" (1/1) ... [2019-10-15 03:21:46,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@170a06bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:46, skipping insertion in model container [2019-10-15 03:21:46,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:21:46" (1/1) ... [2019-10-15 03:21:46,935 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:21:46,979 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:21:47,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:21:47,492 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:21:47,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:21:47,617 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:21:47,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:47 WrapperNode [2019-10-15 03:21:47,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:21:47,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:21:47,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:21:47,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:21:47,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:47" (1/1) ... [2019-10-15 03:21:47,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:47" (1/1) ... [2019-10-15 03:21:47,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:47" (1/1) ... [2019-10-15 03:21:47,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:47" (1/1) ... [2019-10-15 03:21:47,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:47" (1/1) ... [2019-10-15 03:21:47,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:47" (1/1) ... [2019-10-15 03:21:47,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:47" (1/1) ... [2019-10-15 03:21:47,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:21:47,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:21:47,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:21:47,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:21:47,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:47" (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 03:21:47,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:21:47,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:21:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 03:21:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 03:21:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 03:21:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 03:21:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-15 03:21:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-10-15 03:21:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2019-10-15 03:21:47,789 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-15 03:21:47,789 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2019-10-15 03:21:47,789 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-15 03:21:47,789 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-15 03:21:47,789 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-15 03:21:47,790 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-15 03:21:47,790 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-15 03:21:47,790 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-15 03:21:47,790 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-15 03:21:47,790 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-10-15 03:21:47,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-10-15 03:21:47,791 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 03:21:47,791 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 03:21:47,791 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 03:21:47,791 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 03:21:47,791 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 03:21:47,791 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 03:21:47,792 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 03:21:47,792 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 03:21:47,792 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:21:47,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 03:21:47,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 03:21:47,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 03:21:47,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 03:21:47,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 03:21:47,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 03:21:47,793 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-15 03:21:47,793 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-15 03:21:47,793 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-15 03:21:47,794 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-15 03:21:47,794 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-15 03:21:47,794 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-15 03:21:47,794 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-15 03:21:47,794 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-15 03:21:47,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:21:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:21:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 03:21:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 03:21:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-15 03:21:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-15 03:21:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-10-15 03:21:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 03:21:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 03:21:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 03:21:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-15 03:21:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-15 03:21:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-15 03:21:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-15 03:21:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-15 03:21:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-15 03:21:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-15 03:21:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-15 03:21:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-15 03:21:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-10-15 03:21:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-15 03:21:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-15 03:21:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-15 03:21:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-10-15 03:21:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-15 03:21:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2019-10-15 03:21:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-15 03:21:47,799 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2019-10-15 03:21:47,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:21:47,799 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-15 03:21:47,799 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 03:21:47,799 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 03:21:47,799 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 03:21:47,801 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 03:21:47,801 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 03:21:47,801 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 03:21:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 03:21:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:21:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 03:21:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:21:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:21:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 03:21:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:21:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:21:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:21:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:21:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 03:21:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:21:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 03:21:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 03:21:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:21:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 03:21:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 03:21:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 03:21:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:21:47,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 03:21:47,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:21:49,486 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:21:49,486 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 03:21:49,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:21:49 BoogieIcfgContainer [2019-10-15 03:21:49,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:21:49,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:21:49,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:21:49,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:21:49,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:21:46" (1/3) ... [2019-10-15 03:21:49,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b77f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:21:49, skipping insertion in model container [2019-10-15 03:21:49,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:47" (2/3) ... [2019-10-15 03:21:49,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b77f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:21:49, skipping insertion in model container [2019-10-15 03:21:49,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:21:49" (3/3) ... [2019-10-15 03:21:49,499 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product62.cil.c [2019-10-15 03:21:49,510 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:21:49,523 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:21:49,537 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:21:49,576 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:21:49,576 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:21:49,576 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:21:49,577 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:21:49,577 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:21:49,578 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:21:49,578 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:21:49,578 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:21:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states. [2019-10-15 03:21:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 03:21:49,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:49,625 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 03:21:49,628 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:49,635 INFO L82 PathProgramCache]: Analyzing trace with hash -181766063, now seen corresponding path program 1 times [2019-10-15 03:21:49,644 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:49,645 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682643434] [2019-10-15 03:21:49,645 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:49,645 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:49,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:49,984 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 03:21:49,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682643434] [2019-10-15 03:21:49,986 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:21:49,986 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:21:49,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666984619] [2019-10-15 03:21:49,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:21:49,994 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:50,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:21:50,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:21:50,013 INFO L87 Difference]: Start difference. First operand 166 states. Second operand 2 states. [2019-10-15 03:21:50,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:50,058 INFO L93 Difference]: Finished difference Result 265 states and 320 transitions. [2019-10-15 03:21:50,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:21:50,059 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2019-10-15 03:21:50,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:50,073 INFO L225 Difference]: With dead ends: 265 [2019-10-15 03:21:50,073 INFO L226 Difference]: Without dead ends: 133 [2019-10-15 03:21:50,081 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 03:21:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-15 03:21:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2019-10-15 03:21:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-10-15 03:21:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2019-10-15 03:21:50,160 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 42 [2019-10-15 03:21:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:50,160 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2019-10-15 03:21:50,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:21:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2019-10-15 03:21:50,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 03:21:50,168 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:50,168 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 03:21:50,169 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:50,170 INFO L82 PathProgramCache]: Analyzing trace with hash -579616042, now seen corresponding path program 1 times [2019-10-15 03:21:50,171 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:50,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355639421] [2019-10-15 03:21:50,171 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:50,171 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:50,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:50,323 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 03:21:50,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355639421] [2019-10-15 03:21:50,325 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:21:50,325 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:21:50,325 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130475515] [2019-10-15 03:21:50,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:21:50,329 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:50,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:21:50,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:21:50,330 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand 3 states. [2019-10-15 03:21:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:50,377 INFO L93 Difference]: Finished difference Result 219 states and 254 transitions. [2019-10-15 03:21:50,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:21:50,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-10-15 03:21:50,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:50,381 INFO L225 Difference]: With dead ends: 219 [2019-10-15 03:21:50,382 INFO L226 Difference]: Without dead ends: 125 [2019-10-15 03:21:50,383 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 03:21:50,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-15 03:21:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-10-15 03:21:50,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-15 03:21:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2019-10-15 03:21:50,400 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 43 [2019-10-15 03:21:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:50,400 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2019-10-15 03:21:50,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:21:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2019-10-15 03:21:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-15 03:21:50,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:50,403 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 03:21:50,403 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:50,403 INFO L82 PathProgramCache]: Analyzing trace with hash -741704379, now seen corresponding path program 1 times [2019-10-15 03:21:50,404 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:50,404 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011435633] [2019-10-15 03:21:50,404 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:50,404 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:50,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:21:50,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011435633] [2019-10-15 03:21:50,570 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:21:50,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:21:50,571 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049144967] [2019-10-15 03:21:50,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:21:50,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:50,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:21:50,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:21:50,572 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand 7 states. [2019-10-15 03:21:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:50,947 INFO L93 Difference]: Finished difference Result 228 states and 265 transitions. [2019-10-15 03:21:50,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:21:50,948 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-15 03:21:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:50,950 INFO L225 Difference]: With dead ends: 228 [2019-10-15 03:21:50,950 INFO L226 Difference]: Without dead ends: 125 [2019-10-15 03:21:50,952 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 03:21:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-15 03:21:50,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-10-15 03:21:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-15 03:21:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 142 transitions. [2019-10-15 03:21:50,972 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 142 transitions. Word has length 46 [2019-10-15 03:21:50,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:50,972 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 142 transitions. [2019-10-15 03:21:50,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:21:50,973 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 142 transitions. [2019-10-15 03:21:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 03:21:50,982 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:50,982 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 03:21:50,983 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:50,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1156525635, now seen corresponding path program 1 times [2019-10-15 03:21:50,983 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:50,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404704267] [2019-10-15 03:21:50,984 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:50,984 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:50,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:51,144 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 03:21:51,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404704267] [2019-10-15 03:21:51,144 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:21:51,145 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 03:21:51,145 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947529803] [2019-10-15 03:21:51,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:21:51,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:51,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:21:51,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:21:51,148 INFO L87 Difference]: Start difference. First operand 125 states and 142 transitions. Second operand 5 states. [2019-10-15 03:21:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:51,676 INFO L93 Difference]: Finished difference Result 332 states and 391 transitions. [2019-10-15 03:21:51,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:21:51,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-15 03:21:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:51,680 INFO L225 Difference]: With dead ends: 332 [2019-10-15 03:21:51,680 INFO L226 Difference]: Without dead ends: 229 [2019-10-15 03:21:51,686 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 03:21:51,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-10-15 03:21:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 212. [2019-10-15 03:21:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-10-15 03:21:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 232 transitions. [2019-10-15 03:21:51,731 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 232 transitions. Word has length 63 [2019-10-15 03:21:51,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:51,731 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 232 transitions. [2019-10-15 03:21:51,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:21:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 232 transitions. [2019-10-15 03:21:51,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-15 03:21:51,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:51,733 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 03:21:51,733 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:51,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1819528347, now seen corresponding path program 1 times [2019-10-15 03:21:51,734 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:51,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715266824] [2019-10-15 03:21:51,734 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:51,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:51,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:51,895 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 03:21:51,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715266824] [2019-10-15 03:21:51,896 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:21:51,896 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-15 03:21:51,896 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222153610] [2019-10-15 03:21:51,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 03:21:51,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:51,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 03:21:51,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:21:51,898 INFO L87 Difference]: Start difference. First operand 212 states and 232 transitions. Second operand 10 states. [2019-10-15 03:21:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:52,399 INFO L93 Difference]: Finished difference Result 630 states and 717 transitions. [2019-10-15 03:21:52,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 03:21:52,399 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2019-10-15 03:21:52,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:52,404 INFO L225 Difference]: With dead ends: 630 [2019-10-15 03:21:52,404 INFO L226 Difference]: Without dead ends: 440 [2019-10-15 03:21:52,406 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 03:21:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2019-10-15 03:21:52,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2019-10-15 03:21:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-10-15 03:21:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 472 transitions. [2019-10-15 03:21:52,450 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 472 transitions. Word has length 73 [2019-10-15 03:21:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:52,450 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 472 transitions. [2019-10-15 03:21:52,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 03:21:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 472 transitions. [2019-10-15 03:21:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 03:21:52,454 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:52,455 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] [2019-10-15 03:21:52,455 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:52,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1345221674, now seen corresponding path program 1 times [2019-10-15 03:21:52,456 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:52,456 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192783131] [2019-10-15 03:21:52,456 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:52,456 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:52,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 03:21:52,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192783131] [2019-10-15 03:21:52,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67699397] [2019-10-15 03:21:52,834 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 03:21:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:53,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 03:21:53,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:21:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:21:53,349 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:21:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 03:21:53,890 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:21:53,890 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8, 9] imperfect sequences [15] total 27 [2019-10-15 03:21:53,890 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138938771] [2019-10-15 03:21:53,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 03:21:53,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:53,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 03:21:53,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2019-10-15 03:21:53,892 INFO L87 Difference]: Start difference. First operand 426 states and 472 transitions. Second operand 14 states. [2019-10-15 03:21:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:54,944 INFO L93 Difference]: Finished difference Result 1019 states and 1134 transitions. [2019-10-15 03:21:54,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 03:21:54,945 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 130 [2019-10-15 03:21:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:54,951 INFO L225 Difference]: With dead ends: 1019 [2019-10-15 03:21:54,951 INFO L226 Difference]: Without dead ends: 829 [2019-10-15 03:21:54,956 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2019-10-15 03:21:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2019-10-15 03:21:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 826. [2019-10-15 03:21:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2019-10-15 03:21:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 917 transitions. [2019-10-15 03:21:55,030 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 917 transitions. Word has length 130 [2019-10-15 03:21:55,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:55,032 INFO L462 AbstractCegarLoop]: Abstraction has 826 states and 917 transitions. [2019-10-15 03:21:55,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 03:21:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 917 transitions. [2019-10-15 03:21:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-15 03:21:55,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:55,040 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:21:55,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:21:55,246 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:55,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:55,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2111747162, now seen corresponding path program 1 times [2019-10-15 03:21:55,247 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:55,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728359978] [2019-10-15 03:21:55,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:55,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:55,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:21:55,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728359978] [2019-10-15 03:21:55,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059545968] [2019-10-15 03:21:55,367 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 03:21:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:55,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 03:21:55,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:21:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:21:55,629 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:21:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:21:55,940 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:21:55,940 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 3] total 8 [2019-10-15 03:21:55,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073108163] [2019-10-15 03:21:55,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:21:55,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:55,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:21:55,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:21:55,942 INFO L87 Difference]: Start difference. First operand 826 states and 917 transitions. Second operand 3 states. [2019-10-15 03:21:56,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:56,036 INFO L93 Difference]: Finished difference Result 1633 states and 1814 transitions. [2019-10-15 03:21:56,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:21:56,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-10-15 03:21:56,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:56,042 INFO L225 Difference]: With dead ends: 1633 [2019-10-15 03:21:56,043 INFO L226 Difference]: Without dead ends: 829 [2019-10-15 03:21:56,045 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 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 03:21:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2019-10-15 03:21:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 760. [2019-10-15 03:21:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2019-10-15 03:21:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 813 transitions. [2019-10-15 03:21:56,093 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 813 transitions. Word has length 140 [2019-10-15 03:21:56,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:56,094 INFO L462 AbstractCegarLoop]: Abstraction has 760 states and 813 transitions. [2019-10-15 03:21:56,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:21:56,094 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 813 transitions. [2019-10-15 03:21:56,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 03:21:56,097 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:56,097 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 03:21:56,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:21:56,308 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:56,309 INFO L82 PathProgramCache]: Analyzing trace with hash -574104665, now seen corresponding path program 1 times [2019-10-15 03:21:56,309 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:56,310 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560920327] [2019-10-15 03:21:56,310 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:56,310 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:56,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-15 03:21:56,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560920327] [2019-10-15 03:21:56,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714766428] [2019-10-15 03:21:56,438 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 03:21:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:56,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 03:21:56,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:21:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:21:56,686 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:21:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 03:21:56,916 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:21:56,916 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2019-10-15 03:21:56,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903608356] [2019-10-15 03:21:56,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:21:56,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:56,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:21:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:21:56,919 INFO L87 Difference]: Start difference. First operand 760 states and 813 transitions. Second operand 7 states. [2019-10-15 03:21:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:57,146 INFO L93 Difference]: Finished difference Result 775 states and 829 transitions. [2019-10-15 03:21:57,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 03:21:57,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 127 [2019-10-15 03:21:57,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:57,152 INFO L225 Difference]: With dead ends: 775 [2019-10-15 03:21:57,152 INFO L226 Difference]: Without dead ends: 772 [2019-10-15 03:21:57,153 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:21:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2019-10-15 03:21:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 760. [2019-10-15 03:21:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2019-10-15 03:21:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 811 transitions. [2019-10-15 03:21:57,196 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 811 transitions. Word has length 127 [2019-10-15 03:21:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:57,197 INFO L462 AbstractCegarLoop]: Abstraction has 760 states and 811 transitions. [2019-10-15 03:21:57,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:21:57,197 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 811 transitions. [2019-10-15 03:21:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-15 03:21:57,201 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:57,201 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:21:57,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:21:57,406 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:57,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1546399480, now seen corresponding path program 2 times [2019-10-15 03:21:57,407 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:57,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763742948] [2019-10-15 03:21:57,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:57,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:57,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:57,639 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 03:21:57,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763742948] [2019-10-15 03:21:57,639 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:21:57,639 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2019-10-15 03:21:57,640 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257747040] [2019-10-15 03:21:57,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 03:21:57,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:21:57,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 03:21:57,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-15 03:21:57,641 INFO L87 Difference]: Start difference. First operand 760 states and 811 transitions. Second operand 14 states. [2019-10-15 03:21:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:21:58,172 INFO L93 Difference]: Finished difference Result 1392 states and 1552 transitions. [2019-10-15 03:21:58,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 03:21:58,173 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 140 [2019-10-15 03:21:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:21:58,180 INFO L225 Difference]: With dead ends: 1392 [2019-10-15 03:21:58,181 INFO L226 Difference]: Without dead ends: 1016 [2019-10-15 03:21:58,183 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2019-10-15 03:21:58,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2019-10-15 03:21:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 858. [2019-10-15 03:21:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 858 states. [2019-10-15 03:21:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 929 transitions. [2019-10-15 03:21:58,248 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 929 transitions. Word has length 140 [2019-10-15 03:21:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:21:58,249 INFO L462 AbstractCegarLoop]: Abstraction has 858 states and 929 transitions. [2019-10-15 03:21:58,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 03:21:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 929 transitions. [2019-10-15 03:21:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-15 03:21:58,253 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:21:58,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:21:58,254 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:21:58,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:21:58,254 INFO L82 PathProgramCache]: Analyzing trace with hash 725871869, now seen corresponding path program 1 times [2019-10-15 03:21:58,255 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:21:58,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602731236] [2019-10-15 03:21:58,255 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:58,255 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:21:58,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:21:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 03:21:58,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602731236] [2019-10-15 03:21:58,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678939053] [2019-10-15 03:21:58,555 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 03:21:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:21:58,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-15 03:21:58,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:21:58,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:58,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:59,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:21:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:21:59,100 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:21:59,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:22:00,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:22:00,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:22:00,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:22:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 03:22:01,032 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:22:01,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 13] total 36 [2019-10-15 03:22:01,032 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336794254] [2019-10-15 03:22:01,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 03:22:01,033 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:22:01,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 03:22:01,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 03:22:01,034 INFO L87 Difference]: Start difference. First operand 858 states and 929 transitions. Second operand 14 states. [2019-10-15 03:22:03,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:22:03,855 INFO L93 Difference]: Finished difference Result 1988 states and 2290 transitions. [2019-10-15 03:22:03,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 03:22:03,856 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 146 [2019-10-15 03:22:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:22:03,862 INFO L225 Difference]: With dead ends: 1988 [2019-10-15 03:22:03,862 INFO L226 Difference]: Without dead ends: 1152 [2019-10-15 03:22:03,866 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 269 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=398, Invalid=2572, Unknown=0, NotChecked=0, Total=2970 [2019-10-15 03:22:03,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2019-10-15 03:22:03,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1046. [2019-10-15 03:22:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1046 states. [2019-10-15 03:22:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1159 transitions. [2019-10-15 03:22:03,928 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1159 transitions. Word has length 146 [2019-10-15 03:22:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:22:03,928 INFO L462 AbstractCegarLoop]: Abstraction has 1046 states and 1159 transitions. [2019-10-15 03:22:03,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 03:22:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1159 transitions. [2019-10-15 03:22:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 03:22:03,933 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:22:03,933 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:22:04,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:22:04,138 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:22:04,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:22:04,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2003549317, now seen corresponding path program 1 times [2019-10-15 03:22:04,139 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:22:04,139 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422470218] [2019-10-15 03:22:04,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:22:04,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:22:04,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:22:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:22:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 03:22:04,361 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422470218] [2019-10-15 03:22:04,361 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482806771] [2019-10-15 03:22:04,361 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 03:22:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:22:04,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 49 conjunts are in the unsatisfiable core [2019-10-15 03:22:04,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:22:04,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:22:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:22:04,871 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:22:05,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:22:05,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:22:05,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:22:05,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:22:05,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:22:05,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:22:05,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:22:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 03:22:05,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1711615863] [2019-10-15 03:22:05,659 INFO L162 IcfgInterpreter]: Started Sifa with 114 locations of interest [2019-10-15 03:22:05,660 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:22:05,667 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:22:05,675 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:22:05,676 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:22:13,306 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 464 [2019-10-15 03:22:15,125 WARN L191 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-10-15 03:22:15,257 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-15 03:22:15,404 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-15 03:22:15,532 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-15 03:22:15,787 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:16,057 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:16,230 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:16,418 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:16,598 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:16,726 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:16,852 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:17,001 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:17,111 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:17,223 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-15 03:22:17,230 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 184 for LOIs [2019-10-15 03:22:17,512 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 509 [2019-10-15 03:22:17,513 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 542 for LOIs [2019-10-15 03:22:17,625 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:17,772 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:17,903 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:18,026 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:18,128 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:18,247 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:18,394 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:18,504 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:18,661 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:18,920 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 542 [2019-10-15 03:22:19,050 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:19,214 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:19,323 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:19,445 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:19,562 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:19,879 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:20,199 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:20,339 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:20,553 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:20,865 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:21,201 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:21,418 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:21,540 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:21,744 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-15 03:22:21,863 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:22,201 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:22,374 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:22,482 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:22,623 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:22,841 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 556 [2019-10-15 03:22:22,951 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:23,085 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:23,192 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:23,322 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:23,437 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-15 03:22:23,563 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-15 03:22:23,676 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-15 03:22:23,812 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-15 03:22:24,016 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-15 03:22:24,129 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-15 03:22:24,263 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-15 03:22:24,510 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-15 03:22:24,620 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-15 03:22:24,743 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-15 03:22:24,860 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 565 [2019-10-15 03:22:24,971 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 565 [2019-10-15 03:22:25,103 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 565 [2019-10-15 03:22:25,221 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 567 [2019-10-15 03:22:25,340 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 567 [2019-10-15 03:22:25,473 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 567