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/elevator_spec13_product23.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:01:43,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:01:43,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:01:43,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:01:43,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:01:43,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:01:43,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:01:43,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:01:43,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:01:43,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:01:43,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:01:43,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:01:43,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:01:43,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:01:43,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:01:43,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:01:43,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:01:43,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:01:43,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:01:43,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:01:43,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:01:43,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:01:43,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:01:43,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:01:43,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:01:43,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:01:43,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:01:43,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:01:43,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:01:43,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:01:43,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:01:43,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:01:43,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:01:43,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:01:43,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:01:43,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:01:43,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:01:43,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:01:43,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:01:43,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:01:43,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:01:43,245 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:01:43,259 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:01:43,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:01:43,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:01:43,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:01:43,261 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:01:43,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:01:43,261 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:01:43,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:01:43,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:01:43,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:01:43,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:01:43,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:01:43,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:01:43,263 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:01:43,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:01:43,263 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:01:43,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:01:43,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:01:43,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:01:43,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:01:43,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:01:43,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:01:43,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:01:43,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:01:43,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:01:43,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:01:43,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:01:43,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:01:43,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 23:01:43,554 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:01:43,567 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:01:43,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:01:43,572 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:01:43,572 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:01:43,573 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c [2019-10-13 23:01:43,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20ab9afd3/bcaacb90d91940d996b0c512c0f3f9dc/FLAG7dcdbc724 [2019-10-13 23:01:44,307 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:01:44,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c [2019-10-13 23:01:44,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20ab9afd3/bcaacb90d91940d996b0c512c0f3f9dc/FLAG7dcdbc724 [2019-10-13 23:01:44,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20ab9afd3/bcaacb90d91940d996b0c512c0f3f9dc [2019-10-13 23:01:44,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:01:44,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:01:44,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:01:44,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:01:44,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:01:44,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:01:44" (1/1) ... [2019-10-13 23:01:44,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32d8693f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:44, skipping insertion in model container [2019-10-13 23:01:44,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:01:44" (1/1) ... [2019-10-13 23:01:44,502 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:01:44,586 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:01:45,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:01:45,362 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:01:45,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:01:45,538 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:01:45,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:45 WrapperNode [2019-10-13 23:01:45,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:01:45,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:01:45,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:01:45,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:01:45,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:45" (1/1) ... [2019-10-13 23:01:45,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:45" (1/1) ... [2019-10-13 23:01:45,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:45" (1/1) ... [2019-10-13 23:01:45,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:45" (1/1) ... [2019-10-13 23:01:45,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:45" (1/1) ... [2019-10-13 23:01:45,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:45" (1/1) ... [2019-10-13 23:01:45,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:45" (1/1) ... [2019-10-13 23:01:45,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:01:45,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:01:45,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:01:45,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:01:45,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:01:45,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:01:45,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:01:45,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:01:45,784 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:01:45,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:01:45,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 23:01:45,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 23:01:45,785 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:01:45,785 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:01:45,785 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:01:45,786 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:01:45,786 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:01:45,786 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:01:45,786 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:01:45,787 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:01:45,787 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:01:45,787 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:01:45,787 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:01:45,787 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:01:45,788 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:01:45,788 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:01:45,788 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:01:45,788 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:01:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:01:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:01:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 23:01:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 23:01:45,790 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:01:45,790 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:01:45,790 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:01:45,790 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 23:01:45,790 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 23:01:45,790 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:01:45,791 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:01:45,791 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:01:45,791 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:01:45,791 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:01:45,791 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:01:45,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 23:01:45,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 23:01:45,792 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:01:45,792 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:01:45,792 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:01:45,792 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:01:45,793 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:01:45,793 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:01:45,793 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:01:45,793 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:01:45,793 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:01:45,793 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:01:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:01:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:01:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:01:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:01:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:01:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:01:45,795 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:01:45,795 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:01:45,795 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:01:45,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:01:45,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:01:45,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:01:45,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:01:45,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:01:45,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:01:45,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:01:45,796 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:01:45,797 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:01:45,797 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:01:45,797 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:01:45,797 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:01:45,797 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:01:45,798 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:01:45,798 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:01:45,798 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:01:45,798 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:01:45,798 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:01:45,799 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:01:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:01:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:01:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:01:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:01:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:01:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:01:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:01:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:01:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:01:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:01:45,801 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 23:01:45,801 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:01:45,801 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 23:01:45,801 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:01:45,801 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:01:45,802 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:01:45,802 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:01:45,802 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:01:45,802 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:01:45,802 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:01:45,802 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:01:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:01:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:01:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:01:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:01:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:01:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:01:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:01:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:01:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:01:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:01:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:01:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:01:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:01:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:01:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:01:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:01:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:01:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 23:01:45,806 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 23:01:45,806 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:01:45,806 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:01:45,806 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:01:45,806 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:01:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:01:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:01:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 23:01:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 23:01:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:01:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:01:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 23:01:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 23:01:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:01:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:01:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:01:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:01:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:01:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:01:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:01:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:01:45,810 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:01:45,810 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:01:45,810 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:01:45,810 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:01:45,810 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:01:45,810 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:01:45,811 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:01:45,811 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:01:45,811 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:01:45,811 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:01:45,811 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:01:45,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:01:45,812 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:01:45,812 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:01:45,812 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:01:45,812 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:01:45,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:01:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:01:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:01:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:01:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:01:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:01:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:01:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:01:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:01:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:01:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:01:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:01:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:01:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:01:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:01:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:01:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:01:50,651 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:01:50,652 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:01:50,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:01:50 BoogieIcfgContainer [2019-10-13 23:01:50,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:01:50,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:01:50,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:01:50,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:01:50,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:01:44" (1/3) ... [2019-10-13 23:01:50,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494e0708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:01:50, skipping insertion in model container [2019-10-13 23:01:50,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:45" (2/3) ... [2019-10-13 23:01:50,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494e0708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:01:50, skipping insertion in model container [2019-10-13 23:01:50,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:01:50" (3/3) ... [2019-10-13 23:01:50,661 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product23.cil.c [2019-10-13 23:01:50,671 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:01:50,681 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:01:50,693 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:01:50,725 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:01:50,726 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:01:50,726 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:01:50,726 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:01:50,726 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:01:50,726 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:01:50,726 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:01:50,726 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:01:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states. [2019-10-13 23:01:50,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 23:01:50,786 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:50,787 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:01:50,789 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:01:50,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:01:50,795 INFO L82 PathProgramCache]: Analyzing trace with hash 302796206, now seen corresponding path program 1 times [2019-10-13 23:01:50,805 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:01:50,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484084247] [2019-10-13 23:01:50,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:50,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:50,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:01:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:01:51,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484084247] [2019-10-13 23:01:51,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744493639] [2019-10-13 23:01:51,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:01:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:52,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 2942 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 23:01:52,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:01:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:01:52,285 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:01:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:01:52,436 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:01:52,436 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 2 [2019-10-13 23:01:52,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558651737] [2019-10-13 23:01:52,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:01:52,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:01:52,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:01:52,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:01:52,461 INFO L87 Difference]: Start difference. First operand 614 states. Second operand 2 states. [2019-10-13 23:01:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:01:52,549 INFO L93 Difference]: Finished difference Result 978 states and 1484 transitions. [2019-10-13 23:01:52,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:01:52,550 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 133 [2019-10-13 23:01:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:01:52,573 INFO L225 Difference]: With dead ends: 978 [2019-10-13 23:01:52,574 INFO L226 Difference]: Without dead ends: 497 [2019-10-13 23:01:52,585 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:01:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2019-10-13 23:01:52,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2019-10-13 23:01:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2019-10-13 23:01:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 738 transitions. [2019-10-13 23:01:52,708 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 738 transitions. Word has length 133 [2019-10-13 23:01:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:01:52,712 INFO L462 AbstractCegarLoop]: Abstraction has 497 states and 738 transitions. [2019-10-13 23:01:52,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:01:52,712 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 738 transitions. [2019-10-13 23:01:52,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 23:01:52,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:52,722 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:01:52,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:01:52,933 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:01:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:01:52,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2109520046, now seen corresponding path program 1 times [2019-10-13 23:01:52,935 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:01:52,935 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460920373] [2019-10-13 23:01:52,936 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:52,936 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:52,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:01:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:01:53,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460920373] [2019-10-13 23:01:53,327 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:01:53,330 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:01:53,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936286911] [2019-10-13 23:01:53,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:01:53,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:01:53,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:01:53,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:01:53,336 INFO L87 Difference]: Start difference. First operand 497 states and 738 transitions. Second operand 5 states. [2019-10-13 23:01:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:01:54,233 INFO L93 Difference]: Finished difference Result 1417 states and 2145 transitions. [2019-10-13 23:01:54,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:01:54,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2019-10-13 23:01:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:01:54,247 INFO L225 Difference]: With dead ends: 1417 [2019-10-13 23:01:54,254 INFO L226 Difference]: Without dead ends: 957 [2019-10-13 23:01:54,258 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:01:54,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2019-10-13 23:01:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 949. [2019-10-13 23:01:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 949 states. [2019-10-13 23:01:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1432 transitions. [2019-10-13 23:01:54,336 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1432 transitions. Word has length 133 [2019-10-13 23:01:54,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:01:54,337 INFO L462 AbstractCegarLoop]: Abstraction has 949 states and 1432 transitions. [2019-10-13 23:01:54,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:01:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1432 transitions. [2019-10-13 23:01:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 23:01:54,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:54,345 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:01:54,346 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:01:54,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:01:54,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1450524096, now seen corresponding path program 1 times [2019-10-13 23:01:54,346 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:01:54,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445131869] [2019-10-13 23:01:54,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:54,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:54,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:01:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:01:54,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445131869] [2019-10-13 23:01:54,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751935946] [2019-10-13 23:01:54,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:01:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:55,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 2953 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:01:55,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:01:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:01:55,361 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:01:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:01:55,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:01:55,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-13 23:01:55,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112548364] [2019-10-13 23:01:55,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:01:55,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:01:55,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:01:55,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:01:55,542 INFO L87 Difference]: Start difference. First operand 949 states and 1432 transitions. Second operand 4 states. [2019-10-13 23:01:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:01:55,636 INFO L93 Difference]: Finished difference Result 1873 states and 2859 transitions. [2019-10-13 23:01:55,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:01:55,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-10-13 23:01:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:01:55,645 INFO L225 Difference]: With dead ends: 1873 [2019-10-13 23:01:55,646 INFO L226 Difference]: Without dead ends: 961 [2019-10-13 23:01:55,651 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:01:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2019-10-13 23:01:55,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 961. [2019-10-13 23:01:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2019-10-13 23:01:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1444 transitions. [2019-10-13 23:01:55,746 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1444 transitions. Word has length 137 [2019-10-13 23:01:55,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:01:55,748 INFO L462 AbstractCegarLoop]: Abstraction has 961 states and 1444 transitions. [2019-10-13 23:01:55,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:01:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1444 transitions. [2019-10-13 23:01:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 23:01:55,756 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:55,757 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:01:55,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:01:55,966 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:01:55,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:01:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash 295639127, now seen corresponding path program 1 times [2019-10-13 23:01:55,967 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:01:55,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189798192] [2019-10-13 23:01:55,967 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:55,967 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:55,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:01:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:01:56,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189798192] [2019-10-13 23:01:56,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793286368] [2019-10-13 23:01:56,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:01:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:56,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 2958 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:01:56,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:01:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 23:01:56,825 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:01:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:01:56,987 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:01:56,987 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 8 [2019-10-13 23:01:56,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030491012] [2019-10-13 23:01:56,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:01:56,989 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:01:56,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:01:56,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:01:56,990 INFO L87 Difference]: Start difference. First operand 961 states and 1444 transitions. Second operand 5 states. [2019-10-13 23:01:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:01:57,075 INFO L93 Difference]: Finished difference Result 1891 states and 2869 transitions. [2019-10-13 23:01:57,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:01:57,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2019-10-13 23:01:57,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:01:57,088 INFO L225 Difference]: With dead ends: 1891 [2019-10-13 23:01:57,088 INFO L226 Difference]: Without dead ends: 959 [2019-10-13 23:01:57,097 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:01:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2019-10-13 23:01:57,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 959. [2019-10-13 23:01:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2019-10-13 23:01:57,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1436 transitions. [2019-10-13 23:01:57,151 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1436 transitions. Word has length 139 [2019-10-13 23:01:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:01:57,154 INFO L462 AbstractCegarLoop]: Abstraction has 959 states and 1436 transitions. [2019-10-13 23:01:57,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:01:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1436 transitions. [2019-10-13 23:01:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 23:01:57,159 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:57,161 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:01:57,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:01:57,377 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:01:57,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:01:57,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2005309906, now seen corresponding path program 1 times [2019-10-13 23:01:57,378 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:01:57,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628045899] [2019-10-13 23:01:57,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:57,379 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:57,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:01:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:01:57,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628045899] [2019-10-13 23:01:57,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165451502] [2019-10-13 23:01:57,539 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 [2019-10-13 23:01:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:58,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 2962 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:01:58,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:01:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:01:58,307 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:01:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:01:58,504 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:01:58,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2019-10-13 23:01:58,505 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132631039] [2019-10-13 23:01:58,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:01:58,505 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:01:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:01:58,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:01:58,506 INFO L87 Difference]: Start difference. First operand 959 states and 1436 transitions. Second operand 5 states. [2019-10-13 23:01:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:01:59,806 INFO L93 Difference]: Finished difference Result 2318 states and 3535 transitions. [2019-10-13 23:01:59,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:01:59,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2019-10-13 23:01:59,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:01:59,826 INFO L225 Difference]: With dead ends: 2318 [2019-10-13 23:01:59,826 INFO L226 Difference]: Without dead ends: 1396 [2019-10-13 23:01:59,834 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:01:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2019-10-13 23:01:59,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1376. [2019-10-13 23:01:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1376 states. [2019-10-13 23:01:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 2035 transitions. [2019-10-13 23:01:59,899 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 2035 transitions. Word has length 140 [2019-10-13 23:01:59,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:01:59,900 INFO L462 AbstractCegarLoop]: Abstraction has 1376 states and 2035 transitions. [2019-10-13 23:01:59,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:01:59,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 2035 transitions. [2019-10-13 23:01:59,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 23:01:59,904 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:59,904 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:00,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:00,121 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash 25610835, now seen corresponding path program 1 times [2019-10-13 23:02:00,122 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:00,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921626097] [2019-10-13 23:02:00,123 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:00,123 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:00,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:02:00,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921626097] [2019-10-13 23:02:00,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492240685] [2019-10-13 23:02:00,319 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 [2019-10-13 23:02:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:00,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 23:02:00,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:02:00,988 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:02:01,400 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:01,401 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2019-10-13 23:02:01,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519744463] [2019-10-13 23:02:01,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:01,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:01,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:01,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:02:01,404 INFO L87 Difference]: Start difference. First operand 1376 states and 2035 transitions. Second operand 7 states. [2019-10-13 23:02:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:03,306 INFO L93 Difference]: Finished difference Result 2980 states and 4418 transitions. [2019-10-13 23:02:03,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 23:02:03,307 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-10-13 23:02:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:03,338 INFO L225 Difference]: With dead ends: 2980 [2019-10-13 23:02:03,338 INFO L226 Difference]: Without dead ends: 1641 [2019-10-13 23:02:03,348 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 271 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-10-13 23:02:03,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2019-10-13 23:02:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1622. [2019-10-13 23:02:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1622 states. [2019-10-13 23:02:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2381 transitions. [2019-10-13 23:02:03,423 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2381 transitions. Word has length 141 [2019-10-13 23:02:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:03,424 INFO L462 AbstractCegarLoop]: Abstraction has 1622 states and 2381 transitions. [2019-10-13 23:02:03,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2381 transitions. [2019-10-13 23:02:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 23:02:03,427 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:03,428 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:03,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:03,637 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash -526233702, now seen corresponding path program 1 times [2019-10-13 23:02:03,638 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:03,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739234867] [2019-10-13 23:02:03,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:03,639 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:03,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:03,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739234867] [2019-10-13 23:02:03,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503638488] [2019-10-13 23:02:03,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:04,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 2965 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:02:04,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:02:04,441 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:04,700 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:02:04,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 8 [2019-10-13 23:02:04,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398975835] [2019-10-13 23:02:04,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:04,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:04,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:04,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:04,702 INFO L87 Difference]: Start difference. First operand 1622 states and 2381 transitions. Second operand 5 states. [2019-10-13 23:02:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:04,777 INFO L93 Difference]: Finished difference Result 3226 states and 4793 transitions. [2019-10-13 23:02:04,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:04,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-10-13 23:02:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:04,791 INFO L225 Difference]: With dead ends: 3226 [2019-10-13 23:02:04,791 INFO L226 Difference]: Without dead ends: 1654 [2019-10-13 23:02:04,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 277 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2019-10-13 23:02:04,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1634. [2019-10-13 23:02:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1634 states. [2019-10-13 23:02:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2393 transitions. [2019-10-13 23:02:04,876 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2393 transitions. Word has length 141 [2019-10-13 23:02:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:04,877 INFO L462 AbstractCegarLoop]: Abstraction has 1634 states and 2393 transitions. [2019-10-13 23:02:04,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2393 transitions. [2019-10-13 23:02:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 23:02:04,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:04,881 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:05,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:05,098 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:05,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:05,098 INFO L82 PathProgramCache]: Analyzing trace with hash 517519867, now seen corresponding path program 1 times [2019-10-13 23:02:05,099 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:05,099 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124297812] [2019-10-13 23:02:05,100 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:05,100 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:05,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:05,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124297812] [2019-10-13 23:02:05,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152081700] [2019-10-13 23:02:05,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:05,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:02:05,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:02:05,915 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:06,060 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:06,061 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 23:02:06,061 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495222611] [2019-10-13 23:02:06,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:06,063 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:06,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:06,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:06,063 INFO L87 Difference]: Start difference. First operand 1634 states and 2393 transitions. Second operand 4 states. [2019-10-13 23:02:06,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:06,421 INFO L93 Difference]: Finished difference Result 3292 states and 4909 transitions. [2019-10-13 23:02:06,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:02:06,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2019-10-13 23:02:06,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:06,436 INFO L225 Difference]: With dead ends: 3292 [2019-10-13 23:02:06,436 INFO L226 Difference]: Without dead ends: 1709 [2019-10-13 23:02:06,446 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:06,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2019-10-13 23:02:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1691. [2019-10-13 23:02:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1691 states. [2019-10-13 23:02:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2486 transitions. [2019-10-13 23:02:06,522 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2486 transitions. Word has length 143 [2019-10-13 23:02:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:06,523 INFO L462 AbstractCegarLoop]: Abstraction has 1691 states and 2486 transitions. [2019-10-13 23:02:06,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2486 transitions. [2019-10-13 23:02:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 23:02:06,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:06,527 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:06,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:06,736 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash -204798223, now seen corresponding path program 1 times [2019-10-13 23:02:06,737 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:06,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801216138] [2019-10-13 23:02:06,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:06,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:06,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:06,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801216138] [2019-10-13 23:02:06,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792658175] [2019-10-13 23:02:06,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:07,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:02:07,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:07,661 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:07,830 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:07,830 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 10 [2019-10-13 23:02:07,830 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477015212] [2019-10-13 23:02:07,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:07,831 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:07,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:07,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:02:07,832 INFO L87 Difference]: Start difference. First operand 1691 states and 2486 transitions. Second operand 5 states. [2019-10-13 23:02:09,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:09,072 INFO L93 Difference]: Finished difference Result 3951 states and 6024 transitions. [2019-10-13 23:02:09,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:02:09,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-10-13 23:02:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:09,093 INFO L225 Difference]: With dead ends: 3951 [2019-10-13 23:02:09,093 INFO L226 Difference]: Without dead ends: 2770 [2019-10-13 23:02:09,101 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 287 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:02:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2019-10-13 23:02:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 2705. [2019-10-13 23:02:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2705 states. [2019-10-13 23:02:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2705 states to 2705 states and 4076 transitions. [2019-10-13 23:02:09,244 INFO L78 Accepts]: Start accepts. Automaton has 2705 states and 4076 transitions. Word has length 145 [2019-10-13 23:02:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:09,246 INFO L462 AbstractCegarLoop]: Abstraction has 2705 states and 4076 transitions. [2019-10-13 23:02:09,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:09,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2705 states and 4076 transitions. [2019-10-13 23:02:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 23:02:09,253 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:09,254 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:09,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:09,472 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:09,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1824863963, now seen corresponding path program 1 times [2019-10-13 23:02:09,473 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:09,473 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431596163] [2019-10-13 23:02:09,474 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:09,474 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:09,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:09,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431596163] [2019-10-13 23:02:09,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024873558] [2019-10-13 23:02:09,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:10,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:10,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:02:10,341 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:10,469 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:10,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 6 [2019-10-13 23:02:10,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327544517] [2019-10-13 23:02:10,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:10,474 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:10,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:10,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:02:10,475 INFO L87 Difference]: Start difference. First operand 2705 states and 4076 transitions. Second operand 4 states. [2019-10-13 23:02:10,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:10,580 INFO L93 Difference]: Finished difference Result 5348 states and 8234 transitions. [2019-10-13 23:02:10,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:02:10,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-10-13 23:02:10,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:10,600 INFO L225 Difference]: With dead ends: 5348 [2019-10-13 23:02:10,600 INFO L226 Difference]: Without dead ends: 2694 [2019-10-13 23:02:10,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:02:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2019-10-13 23:02:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 2607. [2019-10-13 23:02:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2607 states. [2019-10-13 23:02:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 3894 transitions. [2019-10-13 23:02:10,725 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 3894 transitions. Word has length 145 [2019-10-13 23:02:10,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:10,726 INFO L462 AbstractCegarLoop]: Abstraction has 2607 states and 3894 transitions. [2019-10-13 23:02:10,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 3894 transitions. [2019-10-13 23:02:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 23:02:10,730 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:10,730 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:10,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:10,941 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:10,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:10,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1523029652, now seen corresponding path program 1 times [2019-10-13 23:02:10,941 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:10,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265913807] [2019-10-13 23:02:10,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:10,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:10,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 23:02:11,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265913807] [2019-10-13 23:02:11,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780224882] [2019-10-13 23:02:11,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:11,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:02:11,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:02:11,811 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:11,928 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:02:11,929 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 7 [2019-10-13 23:02:11,929 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811498421] [2019-10-13 23:02:11,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:11,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:11,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:11,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:11,930 INFO L87 Difference]: Start difference. First operand 2607 states and 3894 transitions. Second operand 4 states. [2019-10-13 23:02:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:12,035 INFO L93 Difference]: Finished difference Result 5263 states and 8075 transitions. [2019-10-13 23:02:12,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:02:12,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2019-10-13 23:02:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:12,054 INFO L225 Difference]: With dead ends: 5263 [2019-10-13 23:02:12,054 INFO L226 Difference]: Without dead ends: 2707 [2019-10-13 23:02:12,067 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:12,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2019-10-13 23:02:12,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 2654. [2019-10-13 23:02:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-10-13 23:02:12,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3965 transitions. [2019-10-13 23:02:12,181 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3965 transitions. Word has length 148 [2019-10-13 23:02:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:12,181 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3965 transitions. [2019-10-13 23:02:12,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3965 transitions. [2019-10-13 23:02:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 23:02:12,186 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:12,187 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:12,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:12,395 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:12,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:12,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1981356709, now seen corresponding path program 1 times [2019-10-13 23:02:12,396 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:12,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601766591] [2019-10-13 23:02:12,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:12,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:12,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:02:12,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601766591] [2019-10-13 23:02:12,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124789951] [2019-10-13 23:02:12,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:13,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:02:13,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:13,229 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:13,405 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:13,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 23:02:13,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200598815] [2019-10-13 23:02:13,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:13,406 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:13,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:13,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:02:13,407 INFO L87 Difference]: Start difference. First operand 2654 states and 3965 transitions. Second operand 5 states. [2019-10-13 23:02:14,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:14,798 INFO L93 Difference]: Finished difference Result 5918 states and 9154 transitions. [2019-10-13 23:02:14,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:02:14,798 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2019-10-13 23:02:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:14,822 INFO L225 Difference]: With dead ends: 5918 [2019-10-13 23:02:14,822 INFO L226 Difference]: Without dead ends: 3824 [2019-10-13 23:02:14,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 305 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:02:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2019-10-13 23:02:14,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3774. [2019-10-13 23:02:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3774 states. [2019-10-13 23:02:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3774 states to 3774 states and 5774 transitions. [2019-10-13 23:02:14,993 INFO L78 Accepts]: Start accepts. Automaton has 3774 states and 5774 transitions. Word has length 154 [2019-10-13 23:02:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:14,994 INFO L462 AbstractCegarLoop]: Abstraction has 3774 states and 5774 transitions. [2019-10-13 23:02:14,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:14,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3774 states and 5774 transitions. [2019-10-13 23:02:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 23:02:15,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:15,000 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:15,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:15,209 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:15,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:15,209 INFO L82 PathProgramCache]: Analyzing trace with hash 718068239, now seen corresponding path program 1 times [2019-10-13 23:02:15,210 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:15,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063544114] [2019-10-13 23:02:15,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:15,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:15,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:02:15,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063544114] [2019-10-13 23:02:15,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091655741] [2019-10-13 23:02:15,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:15,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 2984 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:02:15,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:16,006 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:16,164 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:16,164 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 10 [2019-10-13 23:02:16,164 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70260371] [2019-10-13 23:02:16,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:16,165 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:16,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:16,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:02:16,165 INFO L87 Difference]: Start difference. First operand 3774 states and 5774 transitions. Second operand 5 states. [2019-10-13 23:02:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:17,406 INFO L93 Difference]: Finished difference Result 8165 states and 12862 transitions. [2019-10-13 23:02:17,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:02:17,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2019-10-13 23:02:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:17,437 INFO L225 Difference]: With dead ends: 8165 [2019-10-13 23:02:17,437 INFO L226 Difference]: Without dead ends: 4954 [2019-10-13 23:02:17,454 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 307 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:02:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4954 states.