/usr/bin/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_spec14_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:08:06,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:08:06,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:08:06,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:08:06,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:08:06,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:08:06,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:08:06,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:08:06,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:08:06,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:08:06,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:08:06,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:08:06,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:08:06,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:08:06,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:08:06,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:08:06,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:08:06,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:08:06,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:08:06,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:08:06,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:08:06,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:08:06,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:08:06,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:08:06,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:08:06,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:08:06,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:08:06,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:08:06,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:08:06,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:08:06,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:08:06,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:08:06,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:08:06,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:08:06,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:08:06,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:08:06,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:08:06,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:08:06,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:08:06,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:08:06,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:08:06,244 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 [2019-11-07 04:08:06,276 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:08:06,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:08:06,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:08:06,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:08:06,279 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:08:06,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:08:06,280 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:08:06,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:08:06,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:08:06,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:08:06,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:08:06,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:08:06,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:08:06,281 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:08:06,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:08:06,281 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:08:06,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:08:06,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:08:06,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:08:06,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:08:06,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:08:06,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:08:06,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:08:06,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:08:06,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:08:06,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:08:06,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:08:06,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:08:06,285 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 [2019-11-07 04:08:06,572 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:08:06,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:08:06,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:08:06,590 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:08:06,590 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:08:06,591 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product32.cil.c [2019-11-07 04:08:06,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd50f4391/b83c93e7030948fda16f81536f0fa195/FLAG13a040459 [2019-11-07 04:08:07,322 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:08:07,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product32.cil.c [2019-11-07 04:08:07,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd50f4391/b83c93e7030948fda16f81536f0fa195/FLAG13a040459 [2019-11-07 04:08:07,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd50f4391/b83c93e7030948fda16f81536f0fa195 [2019-11-07 04:08:07,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:08:07,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:08:07,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:08:07,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:08:07,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:08:07,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:08:07" (1/1) ... [2019-11-07 04:08:07,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a0a5152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:08:07, skipping insertion in model container [2019-11-07 04:08:07,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:08:07" (1/1) ... [2019-11-07 04:08:07,514 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:08:07,603 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:08:08,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:08:08,321 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:08:08,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:08:08,509 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:08:08,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:08:08 WrapperNode [2019-11-07 04:08:08,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:08:08,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:08:08,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:08:08,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:08:08,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:08:08" (1/1) ... [2019-11-07 04:08:08,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:08:08" (1/1) ... [2019-11-07 04:08:08,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:08:08" (1/1) ... [2019-11-07 04:08:08,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:08:08" (1/1) ... [2019-11-07 04:08:08,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:08:08" (1/1) ... [2019-11-07 04:08:08,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:08:08" (1/1) ... [2019-11-07 04:08:08,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:08:08" (1/1) ... [2019-11-07 04:08:08,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:08:08,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:08:08,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:08:08,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:08:08,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:08:08" (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 [2019-11-07 04:08:08,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:08:08,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:08:08,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 04:08:08,827 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 04:08:08,827 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 04:08:08,827 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 04:08:08,827 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 04:08:08,828 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 04:08:08,828 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 04:08:08,828 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 04:08:08,828 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 04:08:08,828 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 04:08:08,829 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 04:08:08,829 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 04:08:08,829 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 04:08:08,829 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 04:08:08,830 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 04:08:08,830 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 04:08:08,830 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 04:08:08,830 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 04:08:08,830 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 04:08:08,831 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 04:08:08,831 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 04:08:08,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:08:08,831 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 04:08:08,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 04:08:08,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 04:08:08,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 04:08:08,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 04:08:08,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 04:08:08,833 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 04:08:08,833 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 04:08:08,833 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 04:08:08,833 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 04:08:08,834 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 04:08:08,834 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 04:08:08,834 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 04:08:08,834 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 04:08:08,834 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 04:08:08,834 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 04:08:08,835 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 04:08:08,835 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 04:08:08,835 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 04:08:08,835 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 04:08:08,835 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 04:08:08,836 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 04:08:08,836 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 04:08:08,836 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 04:08:08,836 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 04:08:08,836 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 04:08:08,837 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 04:08:08,837 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 04:08:08,837 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 04:08:08,837 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 04:08:08,837 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 04:08:08,838 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 04:08:08,838 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 04:08:08,838 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 04:08:08,838 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 04:08:08,838 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 04:08:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 04:08:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 04:08:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 04:08:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 04:08:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 04:08:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 04:08:08,840 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 04:08:08,840 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 04:08:08,840 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 04:08:08,840 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 04:08:08,840 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 04:08:08,840 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-11-07 04:08:08,841 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 04:08:08,841 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-11-07 04:08:08,841 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 04:08:08,841 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 04:08:08,841 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 04:08:08,841 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 04:08:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 04:08:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-11-07 04:08:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:08:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:08:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 04:08:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 04:08:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 04:08:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 04:08:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 04:08:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 04:08:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 04:08:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 04:08:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 04:08:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 04:08:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 04:08:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 04:08:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 04:08:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 04:08:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 04:08:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 04:08:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 04:08:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 04:08:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 04:08:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 04:08:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 04:08:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 04:08:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 04:08:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 04:08:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 04:08:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 04:08:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 04:08:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 04:08:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 04:08:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 04:08:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:08:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 04:08:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 04:08:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 04:08:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 04:08:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 04:08:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 04:08:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:08:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 04:08:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 04:08:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:08:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 04:08:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 04:08:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:08:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 04:08:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 04:08:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:08:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 04:08:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 04:08:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 04:08:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 04:08:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 04:08:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 04:08:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 04:08:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 04:08:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 04:08:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 04:08:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 04:08:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 04:08:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 04:08:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 04:08:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 04:08:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 04:08:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 04:08:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 04:08:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 04:08:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 04:08:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 04:08:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 04:08:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 04:08:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 04:08:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 04:08:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 04:08:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 04:08:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 04:08:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 04:08:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 04:08:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 04:08:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 04:08:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 04:08:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 04:08:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 04:08:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 04:08:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 04:08:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 04:08:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-11-07 04:08:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-11-07 04:08:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-11-07 04:08:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 04:08:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 04:08:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:08:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 04:08:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:08:13,765 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:08:13,766 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 04:08:13,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:08:13 BoogieIcfgContainer [2019-11-07 04:08:13,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:08:13,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:08:13,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:08:13,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:08:13,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:08:07" (1/3) ... [2019-11-07 04:08:13,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eebe640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:08:13, skipping insertion in model container [2019-11-07 04:08:13,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:08:08" (2/3) ... [2019-11-07 04:08:13,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eebe640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:08:13, skipping insertion in model container [2019-11-07 04:08:13,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:08:13" (3/3) ... [2019-11-07 04:08:13,776 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product32.cil.c [2019-11-07 04:08:13,786 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:08:13,795 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:08:13,806 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:08:13,836 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:08:13,836 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:08:13,836 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:08:13,837 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:08:13,837 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:08:13,837 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:08:13,837 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:08:13,837 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:08:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states. [2019-11-07 04:08:13,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-07 04:08:13,882 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:13,884 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 04:08:13,887 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:13,897 INFO L82 PathProgramCache]: Analyzing trace with hash -252975014, now seen corresponding path program 1 times [2019-11-07 04:08:13,907 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:13,907 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312102581] [2019-11-07 04:08:13,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:08:14,592 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312102581] [2019-11-07 04:08:14,593 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:08:14,594 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:08:14,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337827315] [2019-11-07 04:08:14,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:08:14,604 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:08:14,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:08:14,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:08:14,622 INFO L87 Difference]: Start difference. First operand 587 states. Second operand 3 states. [2019-11-07 04:08:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:08:15,003 INFO L93 Difference]: Finished difference Result 1338 states and 1999 transitions. [2019-11-07 04:08:15,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:08:15,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2019-11-07 04:08:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:08:15,039 INFO L225 Difference]: With dead ends: 1338 [2019-11-07 04:08:15,039 INFO L226 Difference]: Without dead ends: 879 [2019-11-07 04:08:15,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:08:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2019-11-07 04:08:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 834. [2019-11-07 04:08:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2019-11-07 04:08:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1241 transitions. [2019-11-07 04:08:15,227 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1241 transitions. Word has length 72 [2019-11-07 04:08:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:08:15,227 INFO L462 AbstractCegarLoop]: Abstraction has 834 states and 1241 transitions. [2019-11-07 04:08:15,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:08:15,228 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1241 transitions. [2019-11-07 04:08:15,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-07 04:08:15,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:15,250 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-11-07 04:08:15,250 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:15,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:15,250 INFO L82 PathProgramCache]: Analyzing trace with hash -28644872, now seen corresponding path program 1 times [2019-11-07 04:08:15,251 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:15,251 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754970797] [2019-11-07 04:08:15,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 04:08:15,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754970797] [2019-11-07 04:08:15,606 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:08:15,607 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 04:08:15,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245702279] [2019-11-07 04:08:15,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 04:08:15,609 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:08:15,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 04:08:15,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:08:15,610 INFO L87 Difference]: Start difference. First operand 834 states and 1241 transitions. Second operand 7 states. [2019-11-07 04:08:19,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:08:19,805 INFO L93 Difference]: Finished difference Result 2514 states and 3803 transitions. [2019-11-07 04:08:19,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 04:08:19,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2019-11-07 04:08:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:08:19,835 INFO L225 Difference]: With dead ends: 2514 [2019-11-07 04:08:19,835 INFO L226 Difference]: Without dead ends: 1711 [2019-11-07 04:08:19,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:08:19,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2019-11-07 04:08:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1649. [2019-11-07 04:08:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2019-11-07 04:08:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2485 transitions. [2019-11-07 04:08:20,001 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2485 transitions. Word has length 120 [2019-11-07 04:08:20,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:08:20,004 INFO L462 AbstractCegarLoop]: Abstraction has 1649 states and 2485 transitions. [2019-11-07 04:08:20,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 04:08:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2485 transitions. [2019-11-07 04:08:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-07 04:08:20,025 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:20,025 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-11-07 04:08:20,025 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:20,026 INFO L82 PathProgramCache]: Analyzing trace with hash 493145079, now seen corresponding path program 1 times [2019-11-07 04:08:20,026 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:20,027 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691455460] [2019-11-07 04:08:20,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 04:08:20,311 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691455460] [2019-11-07 04:08:20,311 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459766654] [2019-11-07 04:08:20,312 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 [2019-11-07 04:08:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:20,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-07 04:08:20,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:08:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 04:08:21,162 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:08:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 04:08:21,460 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:08:21,460 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 6] total 15 [2019-11-07 04:08:21,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956515994] [2019-11-07 04:08:21,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 04:08:21,464 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:08:21,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 04:08:21,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-11-07 04:08:21,465 INFO L87 Difference]: Start difference. First operand 1649 states and 2485 transitions. Second operand 6 states. [2019-11-07 04:08:22,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:08:22,244 INFO L93 Difference]: Finished difference Result 3567 states and 5358 transitions. [2019-11-07 04:08:22,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 04:08:22,245 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-11-07 04:08:22,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:08:22,258 INFO L225 Difference]: With dead ends: 3567 [2019-11-07 04:08:22,259 INFO L226 Difference]: Without dead ends: 1948 [2019-11-07 04:08:22,267 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 238 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-11-07 04:08:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2019-11-07 04:08:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1932. [2019-11-07 04:08:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1932 states. [2019-11-07 04:08:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 2836 transitions. [2019-11-07 04:08:22,374 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 2836 transitions. Word has length 123 [2019-11-07 04:08:22,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:08:22,374 INFO L462 AbstractCegarLoop]: Abstraction has 1932 states and 2836 transitions. [2019-11-07 04:08:22,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 04:08:22,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 2836 transitions. [2019-11-07 04:08:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-07 04:08:22,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:22,378 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-11-07 04:08:22,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:08:22,597 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:22,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:22,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1126530492, now seen corresponding path program 1 times [2019-11-07 04:08:22,598 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:22,598 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575649763] [2019-11-07 04:08:22,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 04:08:22,824 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575649763] [2019-11-07 04:08:22,824 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:08:22,825 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-07 04:08:22,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172129413] [2019-11-07 04:08:22,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 04:08:22,826 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:08:22,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 04:08:22,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-07 04:08:22,827 INFO L87 Difference]: Start difference. First operand 1932 states and 2836 transitions. Second operand 9 states. [2019-11-07 04:08:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:08:27,020 INFO L93 Difference]: Finished difference Result 2111 states and 3118 transitions. [2019-11-07 04:08:27,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 04:08:27,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 124 [2019-11-07 04:08:27,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:08:27,037 INFO L225 Difference]: With dead ends: 2111 [2019-11-07 04:08:27,037 INFO L226 Difference]: Without dead ends: 2108 [2019-11-07 04:08:27,039 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-11-07 04:08:27,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2019-11-07 04:08:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2028. [2019-11-07 04:08:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2028 states. [2019-11-07 04:08:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2995 transitions. [2019-11-07 04:08:27,214 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2995 transitions. Word has length 124 [2019-11-07 04:08:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:08:27,216 INFO L462 AbstractCegarLoop]: Abstraction has 2028 states and 2995 transitions. [2019-11-07 04:08:27,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 04:08:27,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2995 transitions. [2019-11-07 04:08:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-07 04:08:27,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:27,226 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2019-11-07 04:08:27,226 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:27,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:27,227 INFO L82 PathProgramCache]: Analyzing trace with hash 913097270, now seen corresponding path program 1 times [2019-11-07 04:08:27,227 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:27,227 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375543281] [2019-11-07 04:08:27,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-07 04:08:27,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375543281] [2019-11-07 04:08:27,431 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:08:27,431 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 04:08:27,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790419148] [2019-11-07 04:08:27,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:08:27,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:08:27,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:08:27,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:08:27,434 INFO L87 Difference]: Start difference. First operand 2028 states and 2995 transitions. Second operand 5 states. [2019-11-07 04:08:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:08:27,546 INFO L93 Difference]: Finished difference Result 4049 states and 6027 transitions. [2019-11-07 04:08:27,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:08:27,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2019-11-07 04:08:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:08:27,562 INFO L225 Difference]: With dead ends: 4049 [2019-11-07 04:08:27,563 INFO L226 Difference]: Without dead ends: 2052 [2019-11-07 04:08:27,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:08:27,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2019-11-07 04:08:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2052. [2019-11-07 04:08:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2052 states. [2019-11-07 04:08:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 3019 transitions. [2019-11-07 04:08:27,693 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 3019 transitions. Word has length 160 [2019-11-07 04:08:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:08:27,693 INFO L462 AbstractCegarLoop]: Abstraction has 2052 states and 3019 transitions. [2019-11-07 04:08:27,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:08:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 3019 transitions. [2019-11-07 04:08:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-07 04:08:27,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:27,700 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:08:27,701 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1862977440, now seen corresponding path program 1 times [2019-11-07 04:08:27,702 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:27,702 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342826408] [2019-11-07 04:08:27,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-07 04:08:28,015 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342826408] [2019-11-07 04:08:28,015 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424363458] [2019-11-07 04:08:28,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-07 04:08:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:28,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:08:28,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:08:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 04:08:28,801 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:08:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-07 04:08:29,055 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:08:29,056 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-11-07 04:08:29,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581034391] [2019-11-07 04:08:29,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:08:29,057 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:08:29,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:08:29,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:08:29,058 INFO L87 Difference]: Start difference. First operand 2052 states and 3019 transitions. Second operand 4 states. [2019-11-07 04:08:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:08:29,311 INFO L93 Difference]: Finished difference Result 4229 states and 6366 transitions. [2019-11-07 04:08:29,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:08:29,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-11-07 04:08:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:08:29,328 INFO L225 Difference]: With dead ends: 4229 [2019-11-07 04:08:29,328 INFO L226 Difference]: Without dead ends: 2208 [2019-11-07 04:08:29,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:08:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2019-11-07 04:08:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2208. [2019-11-07 04:08:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2208 states. [2019-11-07 04:08:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 3311 transitions. [2019-11-07 04:08:29,449 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 3311 transitions. Word has length 169 [2019-11-07 04:08:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:08:29,450 INFO L462 AbstractCegarLoop]: Abstraction has 2208 states and 3311 transitions. [2019-11-07 04:08:29,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:08:29,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 3311 transitions. [2019-11-07 04:08:29,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-07 04:08:29,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:29,458 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:08:29,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:08:29,672 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:29,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1563345573, now seen corresponding path program 1 times [2019-11-07 04:08:29,673 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:29,673 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223558112] [2019-11-07 04:08:29,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-07 04:08:29,901 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223558112] [2019-11-07 04:08:29,901 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634323282] [2019-11-07 04:08:29,902 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 [2019-11-07 04:08:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:30,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 3195 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:08:30,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:08:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 04:08:30,651 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:08:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-07 04:08:30,857 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:08:30,857 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 04:08:30,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193642549] [2019-11-07 04:08:30,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:08:30,859 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:08:30,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:08:30,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:08:30,859 INFO L87 Difference]: Start difference. First operand 2208 states and 3311 transitions. Second operand 4 states. [2019-11-07 04:08:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:08:31,133 INFO L93 Difference]: Finished difference Result 4541 states and 6946 transitions. [2019-11-07 04:08:31,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:08:31,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-11-07 04:08:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:08:31,151 INFO L225 Difference]: With dead ends: 4541 [2019-11-07 04:08:31,152 INFO L226 Difference]: Without dead ends: 2364 [2019-11-07 04:08:31,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 345 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:08:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2019-11-07 04:08:31,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2019-11-07 04:08:31,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2364 states. [2019-11-07 04:08:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 3603 transitions. [2019-11-07 04:08:31,271 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 3603 transitions. Word has length 174 [2019-11-07 04:08:31,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:08:31,272 INFO L462 AbstractCegarLoop]: Abstraction has 2364 states and 3603 transitions. [2019-11-07 04:08:31,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:08:31,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 3603 transitions. [2019-11-07 04:08:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-07 04:08:31,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:31,280 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:08:31,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:08:31,488 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:31,488 INFO L82 PathProgramCache]: Analyzing trace with hash 456525333, now seen corresponding path program 1 times [2019-11-07 04:08:31,488 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:31,488 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478110164] [2019-11-07 04:08:31,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-07 04:08:31,655 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478110164] [2019-11-07 04:08:31,655 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657004875] [2019-11-07 04:08:31,656 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 [2019-11-07 04:08:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:32,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 3199 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:08:32,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:08:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 04:08:32,429 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:08:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-07 04:08:32,643 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:08:32,643 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 04:08:32,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170499256] [2019-11-07 04:08:32,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:08:32,646 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:08:32,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:08:32,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:08:32,646 INFO L87 Difference]: Start difference. First operand 2364 states and 3603 transitions. Second operand 4 states. [2019-11-07 04:08:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:08:32,927 INFO L93 Difference]: Finished difference Result 4853 states and 7526 transitions. [2019-11-07 04:08:32,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:08:32,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-11-07 04:08:32,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:08:32,944 INFO L225 Difference]: With dead ends: 4853 [2019-11-07 04:08:32,944 INFO L226 Difference]: Without dead ends: 2520 [2019-11-07 04:08:32,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 353 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:08:32,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2019-11-07 04:08:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2520. [2019-11-07 04:08:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2019-11-07 04:08:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3895 transitions. [2019-11-07 04:08:33,069 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3895 transitions. Word has length 178 [2019-11-07 04:08:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:08:33,069 INFO L462 AbstractCegarLoop]: Abstraction has 2520 states and 3895 transitions. [2019-11-07 04:08:33,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:08:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3895 transitions. [2019-11-07 04:08:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-07 04:08:33,077 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:33,077 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:08:33,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:08:33,286 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:33,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:33,286 INFO L82 PathProgramCache]: Analyzing trace with hash 726319424, now seen corresponding path program 1 times [2019-11-07 04:08:33,288 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:33,288 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678833345] [2019-11-07 04:08:33,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-07 04:08:33,467 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678833345] [2019-11-07 04:08:33,468 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455407395] [2019-11-07 04:08:33,469 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 [2019-11-07 04:08:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:34,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 3202 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:08:34,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:08:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 04:08:34,279 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:08:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-07 04:08:34,542 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:08:34,543 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 04:08:34,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817143390] [2019-11-07 04:08:34,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:08:34,544 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:08:34,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:08:34,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:08:34,545 INFO L87 Difference]: Start difference. First operand 2520 states and 3895 transitions. Second operand 4 states. [2019-11-07 04:08:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:08:34,851 INFO L93 Difference]: Finished difference Result 5165 states and 8106 transitions. [2019-11-07 04:08:34,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:08:34,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 181 [2019-11-07 04:08:34,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:08:34,875 INFO L225 Difference]: With dead ends: 5165 [2019-11-07 04:08:34,875 INFO L226 Difference]: Without dead ends: 2676 [2019-11-07 04:08:34,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 359 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:08:34,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2019-11-07 04:08:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2676. [2019-11-07 04:08:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2676 states. [2019-11-07 04:08:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 4187 transitions. [2019-11-07 04:08:35,031 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 4187 transitions. Word has length 181 [2019-11-07 04:08:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:08:35,034 INFO L462 AbstractCegarLoop]: Abstraction has 2676 states and 4187 transitions. [2019-11-07 04:08:35,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:08:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 4187 transitions. [2019-11-07 04:08:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-07 04:08:35,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:35,044 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:08:35,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:08:35,253 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:35,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:35,253 INFO L82 PathProgramCache]: Analyzing trace with hash 563451854, now seen corresponding path program 1 times [2019-11-07 04:08:35,254 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:35,254 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981117668] [2019-11-07 04:08:35,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-07 04:08:35,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981117668] [2019-11-07 04:08:35,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724430133] [2019-11-07 04:08:35,543 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 [2019-11-07 04:08:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:36,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 3198 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-07 04:08:36,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:08:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 04:08:36,326 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:08:36,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:08:36,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:08:36,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:08:36,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:08:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-07 04:08:36,788 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694632993] [2019-11-07 04:08:36,832 INFO L159 IcfgInterpreter]: Started Sifa with 143 locations of interest [2019-11-07 04:08:36,833 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:08:36,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:08:36,847 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:08:36,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs