/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_spec3_product01.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:11:20,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:11:20,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:11:20,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:11:20,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:11:20,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:11:20,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:11:20,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:11:20,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:11:20,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:11:20,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:11:20,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:11:20,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:11:20,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:11:20,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:11:20,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:11:20,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:11:20,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:11:20,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:11:20,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:11:20,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:11:20,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:11:20,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:11:20,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:11:20,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:11:20,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:11:20,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:11:20,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:11:20,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:11:20,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:11:20,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:11:20,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:11:20,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:11:20,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:11:20,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:11:20,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:11:20,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:11:20,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:11:20,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:11:20,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:11:20,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:11:20,165 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 04:11:20,179 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:11:20,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:11:20,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:11:20,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:11:20,181 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:11:20,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:11:20,182 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:11:20,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:11:20,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:11:20,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:11:20,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:11:20,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:11:20,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:11:20,183 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:11:20,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:11:20,184 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:11:20,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:11:20,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:11:20,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:11:20,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:11:20,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:11:20,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:11:20,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:11:20,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:11:20,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:11:20,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:11:20,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:11:20,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:11:20,186 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 04:11:20,514 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:11:20,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:11:20,538 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:11:20,539 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:11:20,540 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:11:20,541 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c [2019-11-07 04:11:20,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7deaba45/45e9ac83dcc74cc28617b79790a5c4fc/FLAGcca1a63fd [2019-11-07 04:11:21,345 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:11:21,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c [2019-11-07 04:11:21,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7deaba45/45e9ac83dcc74cc28617b79790a5c4fc/FLAGcca1a63fd [2019-11-07 04:11:21,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7deaba45/45e9ac83dcc74cc28617b79790a5c4fc [2019-11-07 04:11:21,506 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:11:21,508 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:11:21,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:11:21,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:11:21,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:11:21,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:11:21" (1/1) ... [2019-11-07 04:11:21,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70263d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:21, skipping insertion in model container [2019-11-07 04:11:21,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:11:21" (1/1) ... [2019-11-07 04:11:21,557 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:11:21,731 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:11:22,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:11:22,576 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:11:22,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:11:22,792 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:11:22,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:22 WrapperNode [2019-11-07 04:11:22,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:11:22,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:11:22,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:11:22,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:11:22,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:22" (1/1) ... [2019-11-07 04:11:22,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:22" (1/1) ... [2019-11-07 04:11:22,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:22" (1/1) ... [2019-11-07 04:11:22,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:22" (1/1) ... [2019-11-07 04:11:22,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:22" (1/1) ... [2019-11-07 04:11:22,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:22" (1/1) ... [2019-11-07 04:11:22,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:22" (1/1) ... [2019-11-07 04:11:22,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:11:22,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:11:22,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:11:22,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:11:22,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:22" (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 04:11:23,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:11:23,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:11:23,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 04:11:23,069 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 04:11:23,069 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 04:11:23,069 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 04:11:23,069 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 04:11:23,069 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 04:11:23,070 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 04:11:23,070 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 04:11:23,070 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 04:11:23,070 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 04:11:23,070 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 04:11:23,071 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 04:11:23,071 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 04:11:23,071 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 04:11:23,071 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 04:11:23,072 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 04:11:23,072 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 04:11:23,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:11:23,072 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 04:11:23,072 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 04:11:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 04:11:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 04:11:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 04:11:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 04:11:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 04:11:23,074 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 04:11:23,074 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 04:11:23,074 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 04:11:23,074 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 04:11:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 04:11:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 04:11:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-11-07 04:11:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-11-07 04:11:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 04:11:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 04:11:23,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 04:11:23,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 04:11:23,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 04:11:23,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 04:11:23,077 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 04:11:23,077 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 04:11:23,077 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 04:11:23,077 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 04:11:23,077 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 04:11:23,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 04:11:23,078 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 04:11:23,078 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 04:11:23,078 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 04:11:23,078 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 04:11:23,079 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 04:11:23,079 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 04:11:23,079 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 04:11:23,079 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 04:11:23,079 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 04:11:23,080 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 04:11:23,080 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 04:11:23,080 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 04:11:23,080 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 04:11:23,080 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 04:11:23,080 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 04:11:23,081 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 04:11:23,081 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 04:11:23,081 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 04:11:23,081 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 04:11:23,082 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 04:11:23,082 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 04:11:23,082 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 04:11:23,082 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 04:11:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:11:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:11:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 04:11:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 04:11:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 04:11:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 04:11:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 04:11:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 04:11:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 04:11:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 04:11:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 04:11:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 04:11:23,085 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 04:11:23,085 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 04:11:23,085 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 04:11:23,085 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 04:11:23,085 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 04:11:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 04:11:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 04:11:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 04:11:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 04:11:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 04:11:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 04:11:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 04:11:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 04:11:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 04:11:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 04:11:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 04:11:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 04:11:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 04:11:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:11:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 04:11:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 04:11:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 04:11:23,089 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 04:11:23,089 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 04:11:23,089 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 04:11:23,089 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 04:11:23,089 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 04:11:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 04:11:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 04:11:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 04:11:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 04:11:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 04:11:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 04:11:23,091 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 04:11:23,091 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 04:11:23,091 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-11-07 04:11:23,091 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-11-07 04:11:23,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 04:11:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 04:11:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 04:11:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 04:11:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 04:11:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 04:11:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:11:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 04:11:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 04:11:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:11:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 04:11:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 04:11:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:11:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 04:11:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 04:11:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:11:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 04:11:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 04:11:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 04:11:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 04:11:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 04:11:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 04:11:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 04:11:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 04:11:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 04:11:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 04:11:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 04:11:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 04:11:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 04:11:23,097 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 04:11:23,097 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 04:11:23,097 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 04:11:23,097 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 04:11:23,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:11:23,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 04:11:23,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:11:27,928 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:11:27,928 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 04:11:27,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:11:27 BoogieIcfgContainer [2019-11-07 04:11:27,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:11:27,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:11:27,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:11:27,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:11:27,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:11:21" (1/3) ... [2019-11-07 04:11:27,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5434076a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:11:27, skipping insertion in model container [2019-11-07 04:11:27,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:22" (2/3) ... [2019-11-07 04:11:27,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5434076a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:11:27, skipping insertion in model container [2019-11-07 04:11:27,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:11:27" (3/3) ... [2019-11-07 04:11:27,940 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product01.cil.c [2019-11-07 04:11:27,949 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:11:27,957 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:11:27,969 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:11:28,004 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:11:28,004 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:11:28,004 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:11:28,004 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:11:28,004 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:11:28,004 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:11:28,005 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:11:28,005 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:11:28,038 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states. [2019-11-07 04:11:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-07 04:11:28,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:28,059 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, 1, 1, 1, 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 04:11:28,061 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:28,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2102671491, now seen corresponding path program 1 times [2019-11-07 04:11:28,077 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:28,078 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68714274] [2019-11-07 04:11:28,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:28,789 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 04:11:28,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68714274] [2019-11-07 04:11:28,791 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:11:28,791 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 04:11:28,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877155115] [2019-11-07 04:11:28,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 04:11:28,800 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:28,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 04:11:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:11:28,821 INFO L87 Difference]: Start difference. First operand 554 states. Second operand 8 states. [2019-11-07 04:11:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:29,082 INFO L93 Difference]: Finished difference Result 841 states and 1303 transitions. [2019-11-07 04:11:29,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 04:11:29,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2019-11-07 04:11:29,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:29,123 INFO L225 Difference]: With dead ends: 841 [2019-11-07 04:11:29,124 INFO L226 Difference]: Without dead ends: 429 [2019-11-07 04:11:29,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:11:29,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2019-11-07 04:11:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 426. [2019-11-07 04:11:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-11-07 04:11:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 645 transitions. [2019-11-07 04:11:29,278 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 645 transitions. Word has length 99 [2019-11-07 04:11:29,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:29,279 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 645 transitions. [2019-11-07 04:11:29,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 04:11:29,279 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 645 transitions. [2019-11-07 04:11:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-07 04:11:29,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:29,288 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 04:11:29,288 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:29,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1636883222, now seen corresponding path program 1 times [2019-11-07 04:11:29,289 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:29,289 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883848134] [2019-11-07 04:11:29,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:11:29,671 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883848134] [2019-11-07 04:11:29,671 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437662837] [2019-11-07 04:11:29,671 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 04:11:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:30,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 2933 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:11:30,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:11:30,430 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:11:30,575 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:11:30,575 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 10 [2019-11-07 04:11:30,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620176333] [2019-11-07 04:11:30,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:11:30,578 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:30,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:11:30,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:11:30,579 INFO L87 Difference]: Start difference. First operand 426 states and 645 transitions. Second operand 5 states. [2019-11-07 04:11:32,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:32,330 INFO L93 Difference]: Finished difference Result 1566 states and 2425 transitions. [2019-11-07 04:11:32,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:11:32,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2019-11-07 04:11:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:32,349 INFO L225 Difference]: With dead ends: 1566 [2019-11-07 04:11:32,349 INFO L226 Difference]: Without dead ends: 1171 [2019-11-07 04:11:32,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:11:32,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2019-11-07 04:11:32,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1159. [2019-11-07 04:11:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1159 states. [2019-11-07 04:11:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1743 transitions. [2019-11-07 04:11:32,474 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1743 transitions. Word has length 103 [2019-11-07 04:11:32,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:32,479 INFO L462 AbstractCegarLoop]: Abstraction has 1159 states and 1743 transitions. [2019-11-07 04:11:32,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:11:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1743 transitions. [2019-11-07 04:11:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-07 04:11:32,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:32,488 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 04:11:32,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:11:32,696 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:32,697 INFO L82 PathProgramCache]: Analyzing trace with hash 27946490, now seen corresponding path program 1 times [2019-11-07 04:11:32,697 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:32,698 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375038672] [2019-11-07 04:11:32,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:11:32,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375038672] [2019-11-07 04:11:32,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281026734] [2019-11-07 04:11:32,915 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 04:11:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:33,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 2949 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-07 04:11:33,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:11:33,646 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:33,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:11:33,856 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:11:33,856 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-11-07 04:11:33,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37632498] [2019-11-07 04:11:33,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 04:11:33,858 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:33,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 04:11:33,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:11:33,858 INFO L87 Difference]: Start difference. First operand 1159 states and 1743 transitions. Second operand 7 states. [2019-11-07 04:11:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:34,582 INFO L93 Difference]: Finished difference Result 2127 states and 3217 transitions. [2019-11-07 04:11:34,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 04:11:34,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2019-11-07 04:11:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:34,598 INFO L225 Difference]: With dead ends: 2127 [2019-11-07 04:11:34,598 INFO L226 Difference]: Without dead ends: 1282 [2019-11-07 04:11:34,605 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:11:34,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2019-11-07 04:11:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1231. [2019-11-07 04:11:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1231 states. [2019-11-07 04:11:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1843 transitions. [2019-11-07 04:11:34,793 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1843 transitions. Word has length 107 [2019-11-07 04:11:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:34,794 INFO L462 AbstractCegarLoop]: Abstraction has 1231 states and 1843 transitions. [2019-11-07 04:11:34,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 04:11:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1843 transitions. [2019-11-07 04:11:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-07 04:11:34,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:34,806 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 04:11:35,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:11:35,022 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:35,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:35,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1106744652, now seen corresponding path program 1 times [2019-11-07 04:11:35,023 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:35,023 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284000870] [2019-11-07 04:11:35,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:11:35,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284000870] [2019-11-07 04:11:35,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614111516] [2019-11-07 04:11:35,188 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 04:11:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:35,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 2938 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:11:35,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:11:35,764 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:11:35,899 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:11:35,899 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 10 [2019-11-07 04:11:35,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218830152] [2019-11-07 04:11:35,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:11:35,900 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:35,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:11:35,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:11:35,901 INFO L87 Difference]: Start difference. First operand 1231 states and 1843 transitions. Second operand 5 states. [2019-11-07 04:11:36,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:36,068 INFO L93 Difference]: Finished difference Result 2296 states and 3493 transitions. [2019-11-07 04:11:36,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:11:36,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-11-07 04:11:36,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:36,078 INFO L225 Difference]: With dead ends: 2296 [2019-11-07 04:11:36,078 INFO L226 Difference]: Without dead ends: 1231 [2019-11-07 04:11:36,084 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:11:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2019-11-07 04:11:36,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1231. [2019-11-07 04:11:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1231 states. [2019-11-07 04:11:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1822 transitions. [2019-11-07 04:11:36,140 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1822 transitions. Word has length 108 [2019-11-07 04:11:36,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:36,141 INFO L462 AbstractCegarLoop]: Abstraction has 1231 states and 1822 transitions. [2019-11-07 04:11:36,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:11:36,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1822 transitions. [2019-11-07 04:11:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-07 04:11:36,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:36,143 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 04:11:36,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:11:36,419 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:36,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2082142587, now seen corresponding path program 1 times [2019-11-07 04:11:36,420 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:36,420 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099395007] [2019-11-07 04:11:36,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 04:11:36,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099395007] [2019-11-07 04:11:36,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754526655] [2019-11-07 04:11:36,591 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 04:11:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:37,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 2948 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-07 04:11:37,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:37,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:37,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:11:37,338 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:37,510 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:37,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:37,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 04:11:37,753 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:11:37,753 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 10] total 23 [2019-11-07 04:11:37,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685321165] [2019-11-07 04:11:37,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 04:11:37,755 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 04:11:37,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2019-11-07 04:11:37,756 INFO L87 Difference]: Start difference. First operand 1231 states and 1822 transitions. Second operand 10 states. [2019-11-07 04:11:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:42,937 INFO L93 Difference]: Finished difference Result 2151 states and 3213 transitions. [2019-11-07 04:11:42,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 04:11:42,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2019-11-07 04:11:42,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:42,966 INFO L225 Difference]: With dead ends: 2151 [2019-11-07 04:11:42,966 INFO L226 Difference]: Without dead ends: 2148 [2019-11-07 04:11:42,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2019-11-07 04:11:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2019-11-07 04:11:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2077. [2019-11-07 04:11:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2019-11-07 04:11:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3108 transitions. [2019-11-07 04:11:43,170 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3108 transitions. Word has length 110 [2019-11-07 04:11:43,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:43,171 INFO L462 AbstractCegarLoop]: Abstraction has 2077 states and 3108 transitions. [2019-11-07 04:11:43,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 04:11:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3108 transitions. [2019-11-07 04:11:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-07 04:11:43,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:43,176 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 04:11:43,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:11:43,396 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:43,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:43,396 INFO L82 PathProgramCache]: Analyzing trace with hash -662345039, now seen corresponding path program 1 times [2019-11-07 04:11:43,397 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:43,397 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290157621] [2019-11-07 04:11:43,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 04:11:43,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290157621] [2019-11-07 04:11:43,714 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110954625] [2019-11-07 04:11:43,714 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 04:11:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:44,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 2949 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:11:44,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:11:44,532 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:11:44,624 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:11:44,625 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-11-07 04:11:44,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878999668] [2019-11-07 04:11:44,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:11:44,626 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:44,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:11:44,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:11:44,627 INFO L87 Difference]: Start difference. First operand 2077 states and 3108 transitions. Second operand 3 states. [2019-11-07 04:11:45,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:45,049 INFO L93 Difference]: Finished difference Result 5912 states and 9145 transitions. [2019-11-07 04:11:45,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:11:45,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2019-11-07 04:11:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:45,080 INFO L225 Difference]: With dead ends: 5912 [2019-11-07 04:11:45,081 INFO L226 Difference]: Without dead ends: 3866 [2019-11-07 04:11:45,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:11:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2019-11-07 04:11:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 3743. [2019-11-07 04:11:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3743 states. [2019-11-07 04:11:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 5637 transitions. [2019-11-07 04:11:45,359 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 5637 transitions. Word has length 111 [2019-11-07 04:11:45,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:45,361 INFO L462 AbstractCegarLoop]: Abstraction has 3743 states and 5637 transitions. [2019-11-07 04:11:45,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:11:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 5637 transitions. [2019-11-07 04:11:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-07 04:11:45,366 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:45,366 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 04:11:45,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:11:45,577 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:45,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1717081084, now seen corresponding path program 1 times [2019-11-07 04:11:45,578 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:45,578 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671226878] [2019-11-07 04:11:45,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:11:45,815 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671226878] [2019-11-07 04:11:45,816 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:11:45,817 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 04:11:45,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281668035] [2019-11-07 04:11:45,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 04:11:45,818 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:45,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 04:11:45,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:11:45,819 INFO L87 Difference]: Start difference. First operand 3743 states and 5637 transitions. Second operand 8 states. [2019-11-07 04:11:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:49,053 INFO L93 Difference]: Finished difference Result 10044 states and 15259 transitions. [2019-11-07 04:11:49,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 04:11:49,054 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2019-11-07 04:11:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:49,105 INFO L225 Difference]: With dead ends: 10044 [2019-11-07 04:11:49,105 INFO L226 Difference]: Without dead ends: 6332 [2019-11-07 04:11:49,123 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:11:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6332 states. [2019-11-07 04:11:49,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6332 to 6317. [2019-11-07 04:11:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6317 states. [2019-11-07 04:11:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6317 states to 6317 states and 9599 transitions. [2019-11-07 04:11:49,534 INFO L78 Accepts]: Start accepts. Automaton has 6317 states and 9599 transitions. Word has length 110 [2019-11-07 04:11:49,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:49,537 INFO L462 AbstractCegarLoop]: Abstraction has 6317 states and 9599 transitions. [2019-11-07 04:11:49,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 04:11:49,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6317 states and 9599 transitions. [2019-11-07 04:11:49,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-07 04:11:49,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:49,540 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 04:11:49,540 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:49,541 INFO L82 PathProgramCache]: Analyzing trace with hash -822865660, now seen corresponding path program 1 times [2019-11-07 04:11:49,541 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:49,541 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995919189] [2019-11-07 04:11:49,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:11:49,784 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995919189] [2019-11-07 04:11:49,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951244978] [2019-11-07 04:11:49,785 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 04:11:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:50,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 2938 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:11:50,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:11:50,430 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:11:50,549 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:11:50,549 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 04:11:50,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770333444] [2019-11-07 04:11:50,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:11:50,551 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:50,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:11:50,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:11:50,556 INFO L87 Difference]: Start difference. First operand 6317 states and 9599 transitions. Second operand 3 states. [2019-11-07 04:11:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:50,991 INFO L93 Difference]: Finished difference Result 14365 states and 22296 transitions. [2019-11-07 04:11:50,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:11:50,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-11-07 04:11:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:51,181 INFO L225 Difference]: With dead ends: 14365 [2019-11-07 04:11:51,181 INFO L226 Difference]: Without dead ends: 8079 [2019-11-07 04:11:51,214 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:11:51,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2019-11-07 04:11:51,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 7863. [2019-11-07 04:11:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7863 states. [2019-11-07 04:11:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7863 states to 7863 states and 11953 transitions. [2019-11-07 04:11:51,744 INFO L78 Accepts]: Start accepts. Automaton has 7863 states and 11953 transitions. Word has length 110 [2019-11-07 04:11:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:51,745 INFO L462 AbstractCegarLoop]: Abstraction has 7863 states and 11953 transitions. [2019-11-07 04:11:51,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:11:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 7863 states and 11953 transitions. [2019-11-07 04:11:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-07 04:11:51,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:51,749 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 04:11:51,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:11:51,957 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:51,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:51,958 INFO L82 PathProgramCache]: Analyzing trace with hash -943739269, now seen corresponding path program 1 times [2019-11-07 04:11:51,958 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:51,958 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980171741] [2019-11-07 04:11:51,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 04:11:52,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980171741] [2019-11-07 04:11:52,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955262613] [2019-11-07 04:11:52,171 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 [2019-11-07 04:11:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:52,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 3020 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 04:11:52,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:11:52,791 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 04:11:52,920 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:11:52,920 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 10 [2019-11-07 04:11:52,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460451806] [2019-11-07 04:11:52,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:11:52,924 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:52,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:11:52,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:11:52,925 INFO L87 Difference]: Start difference. First operand 7863 states and 11953 transitions. Second operand 5 states.