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_product11.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:06:19,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:06:19,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:06:19,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:06:19,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:06:19,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:06:19,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:06:19,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:06:19,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:06:19,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:06:19,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:06:19,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:06:19,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:06:19,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:06:19,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:06:19,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:06:19,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:06:19,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:06:19,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:06:19,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:06:19,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:06:19,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:06:19,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:06:19,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:06:19,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:06:19,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:06:19,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:06:19,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:06:19,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:06:19,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:06:19,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:06:20,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:06:20,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:06:20,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:06:20,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:06:20,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:06:20,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:06:20,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:06:20,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:06:20,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:06:20,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:06:20,008 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:06:20,037 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:06:20,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:06:20,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:06:20,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:06:20,042 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:06:20,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:06:20,043 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:06:20,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:06:20,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:06:20,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:06:20,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:06:20,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:06:20,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:06:20,045 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:06:20,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:06:20,046 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:06:20,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:06:20,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:06:20,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:06:20,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:06:20,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:06:20,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:06:20,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:06:20,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:06:20,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:06:20,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:06:20,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:06:20,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:06:20,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:06:20,411 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:06:20,436 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:06:20,441 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:06:20,442 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:06:20,443 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:06:20,444 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product11.cil.c [2019-10-15 03:06:20,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1abb51971/661c641db7c3454997b7f4f70b1874fe/FLAG0ad6a92dc [2019-10-15 03:06:21,563 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:06:21,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product11.cil.c [2019-10-15 03:06:21,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1abb51971/661c641db7c3454997b7f4f70b1874fe/FLAG0ad6a92dc [2019-10-15 03:06:21,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1abb51971/661c641db7c3454997b7f4f70b1874fe [2019-10-15 03:06:21,654 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:06:21,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:06:21,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:06:21,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:06:21,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:06:21,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:06:21" (1/1) ... [2019-10-15 03:06:21,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54803c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:21, skipping insertion in model container [2019-10-15 03:06:21,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:06:21" (1/1) ... [2019-10-15 03:06:21,679 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:06:21,754 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:06:22,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:06:22,625 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:06:22,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:06:22,901 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:06:22,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:22 WrapperNode [2019-10-15 03:06:22,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:06:22,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:06:22,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:06:22,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:06:22,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:22" (1/1) ... [2019-10-15 03:06:22,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:22" (1/1) ... [2019-10-15 03:06:22,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:22" (1/1) ... [2019-10-15 03:06:22,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:22" (1/1) ... [2019-10-15 03:06:23,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:22" (1/1) ... [2019-10-15 03:06:23,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:22" (1/1) ... [2019-10-15 03:06:23,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:22" (1/1) ... [2019-10-15 03:06:23,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:06:23,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:06:23,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:06:23,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:06:23,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:22" (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 [2019-10-15 03:06:23,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:06:23,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:06:23,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 03:06:23,183 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 03:06:23,183 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 03:06:23,184 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 03:06:23,185 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 03:06:23,185 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 03:06:23,186 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 03:06:23,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 03:06:23,186 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 03:06:23,187 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 03:06:23,187 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 03:06:23,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-10-15 03:06:23,188 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 03:06:23,188 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 03:06:23,191 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 03:06:23,191 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 03:06:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 03:06:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 03:06:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 03:06:23,194 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 03:06:23,194 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 03:06:23,194 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 03:06:23,194 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 03:06:23,194 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 03:06:23,195 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 03:06:23,195 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 03:06:23,195 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 03:06:23,195 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 03:06:23,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:06:23,196 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 03:06:23,196 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 03:06:23,196 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 03:06:23,196 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 03:06:23,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 03:06:23,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 03:06:23,197 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 03:06:23,197 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 03:06:23,197 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 03:06:23,198 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 03:06:23,198 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 03:06:23,198 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 03:06:23,198 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 03:06:23,198 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 03:06:23,198 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 03:06:23,199 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 03:06:23,199 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 03:06:23,199 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 03:06:23,200 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 03:06:23,201 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 03:06:23,201 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 03:06:23,201 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 03:06:23,201 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 03:06:23,201 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 03:06:23,202 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 03:06:23,202 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 03:06:23,202 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 03:06:23,202 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 03:06:23,203 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 03:06:23,203 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 03:06:23,203 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 03:06:23,203 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 03:06:23,204 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 03:06:23,204 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 03:06:23,204 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 03:06:23,204 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 03:06:23,204 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 03:06:23,205 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 03:06:23,205 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 03:06:23,205 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 03:06:23,205 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 03:06:23,205 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 03:06:23,206 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 03:06:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:06:23,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:06:23,207 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 03:06:23,207 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 03:06:23,207 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 03:06:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 03:06:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 03:06:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 03:06:23,209 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 03:06:23,209 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 03:06:23,210 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 03:06:23,210 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 03:06:23,210 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 03:06:23,210 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 03:06:23,210 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 03:06:23,210 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 03:06:23,211 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 03:06:23,211 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 03:06:23,211 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 03:06:23,211 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 03:06:23,211 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 03:06:23,211 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 03:06:23,212 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-10-15 03:06:23,212 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:06:23,212 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 03:06:23,212 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 03:06:23,212 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 03:06:23,212 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 03:06:23,213 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 03:06:23,213 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 03:06:23,213 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 03:06:23,213 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 03:06:23,213 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 03:06:23,214 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 03:06:23,214 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 03:06:23,214 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 03:06:23,214 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 03:06:23,214 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 03:06:23,214 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 03:06:23,215 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 03:06:23,215 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 03:06:23,215 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 03:06:23,216 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:06:23,216 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 03:06:23,216 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:06:23,216 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:06:23,217 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 03:06:23,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:06:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:06:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:06:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:06:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 03:06:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:06:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 03:06:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 03:06:23,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:06:23,220 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 03:06:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 03:06:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:06:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 03:06:23,225 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 03:06:23,225 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 03:06:23,225 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 03:06:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 03:06:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 03:06:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 03:06:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 03:06:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 03:06:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 03:06:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 03:06:23,233 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 03:06:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 03:06:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 03:06:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 03:06:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 03:06:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 03:06:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 03:06:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 03:06:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 03:06:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 03:06:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 03:06:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 03:06:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 03:06:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 03:06:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 03:06:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 03:06:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:06:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 03:06:23,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:06:29,682 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:06:29,682 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 03:06:29,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:06:29 BoogieIcfgContainer [2019-10-15 03:06:29,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:06:29,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:06:29,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:06:29,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:06:29,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:06:21" (1/3) ... [2019-10-15 03:06:29,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc14d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:06:29, skipping insertion in model container [2019-10-15 03:06:29,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:22" (2/3) ... [2019-10-15 03:06:29,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc14d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:06:29, skipping insertion in model container [2019-10-15 03:06:29,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:06:29" (3/3) ... [2019-10-15 03:06:29,704 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product11.cil.c [2019-10-15 03:06:29,722 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:06:29,750 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:06:29,780 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:06:29,858 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:06:29,859 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:06:29,859 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:06:29,859 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:06:29,861 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:06:29,861 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:06:29,861 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:06:29,861 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:06:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states. [2019-10-15 03:06:29,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 03:06:29,929 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:29,930 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:29,932 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:29,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:29,939 INFO L82 PathProgramCache]: Analyzing trace with hash 546404040, now seen corresponding path program 1 times [2019-10-15 03:06:29,951 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:29,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35406814] [2019-10-15 03:06:29,951 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:29,952 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:29,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 03:06:31,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35406814] [2019-10-15 03:06:31,109 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:31,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 03:06:31,110 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253748210] [2019-10-15 03:06:31,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:06:31,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:31,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:06:31,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:06:31,144 INFO L87 Difference]: Start difference. First operand 535 states. Second operand 5 states. [2019-10-15 03:06:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:32,999 INFO L93 Difference]: Finished difference Result 1207 states and 1831 transitions. [2019-10-15 03:06:33,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:06:33,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2019-10-15 03:06:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:33,035 INFO L225 Difference]: With dead ends: 1207 [2019-10-15 03:06:33,036 INFO L226 Difference]: Without dead ends: 794 [2019-10-15 03:06:33,046 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:06:33,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2019-10-15 03:06:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 787. [2019-10-15 03:06:33,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2019-10-15 03:06:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1184 transitions. [2019-10-15 03:06:33,200 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1184 transitions. Word has length 110 [2019-10-15 03:06:33,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:33,204 INFO L462 AbstractCegarLoop]: Abstraction has 787 states and 1184 transitions. [2019-10-15 03:06:33,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:06:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1184 transitions. [2019-10-15 03:06:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-15 03:06:33,228 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:33,229 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:33,229 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:33,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:33,230 INFO L82 PathProgramCache]: Analyzing trace with hash 330514878, now seen corresponding path program 1 times [2019-10-15 03:06:33,230 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:33,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115251276] [2019-10-15 03:06:33,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:33,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:33,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 03:06:33,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115251276] [2019-10-15 03:06:33,659 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:33,659 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:06:33,659 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215345868] [2019-10-15 03:06:33,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:06:33,672 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:33,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:06:33,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:33,678 INFO L87 Difference]: Start difference. First operand 787 states and 1184 transitions. Second operand 7 states. [2019-10-15 03:06:35,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:35,109 INFO L93 Difference]: Finished difference Result 919 states and 1346 transitions. [2019-10-15 03:06:35,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 03:06:35,110 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2019-10-15 03:06:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:35,129 INFO L225 Difference]: With dead ends: 919 [2019-10-15 03:06:35,130 INFO L226 Difference]: Without dead ends: 916 [2019-10-15 03:06:35,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:06:35,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2019-10-15 03:06:35,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 908. [2019-10-15 03:06:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2019-10-15 03:06:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1334 transitions. [2019-10-15 03:06:35,353 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1334 transitions. Word has length 114 [2019-10-15 03:06:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:35,355 INFO L462 AbstractCegarLoop]: Abstraction has 908 states and 1334 transitions. [2019-10-15 03:06:35,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:06:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1334 transitions. [2019-10-15 03:06:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 03:06:35,366 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:35,367 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:35,367 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:35,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:35,367 INFO L82 PathProgramCache]: Analyzing trace with hash -685253192, now seen corresponding path program 1 times [2019-10-15 03:06:35,370 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:35,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101604917] [2019-10-15 03:06:35,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:35,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:35,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-15 03:06:35,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101604917] [2019-10-15 03:06:35,671 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:35,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 03:06:35,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881597336] [2019-10-15 03:06:35,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:06:35,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:35,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:06:35,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:06:35,676 INFO L87 Difference]: Start difference. First operand 908 states and 1334 transitions. Second operand 5 states. [2019-10-15 03:06:35,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:35,756 INFO L93 Difference]: Finished difference Result 1795 states and 2655 transitions. [2019-10-15 03:06:35,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:35,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-10-15 03:06:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:35,767 INFO L225 Difference]: With dead ends: 1795 [2019-10-15 03:06:35,767 INFO L226 Difference]: Without dead ends: 918 [2019-10-15 03:06:35,774 INFO L600 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 [2019-10-15 03:06:35,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2019-10-15 03:06:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 918. [2019-10-15 03:06:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2019-10-15 03:06:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1344 transitions. [2019-10-15 03:06:35,842 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1344 transitions. Word has length 150 [2019-10-15 03:06:35,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:35,843 INFO L462 AbstractCegarLoop]: Abstraction has 918 states and 1344 transitions. [2019-10-15 03:06:35,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:06:35,843 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1344 transitions. [2019-10-15 03:06:35,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 03:06:35,850 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:35,850 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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] [2019-10-15 03:06:35,851 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:35,851 INFO L82 PathProgramCache]: Analyzing trace with hash -59087556, now seen corresponding path program 1 times [2019-10-15 03:06:35,852 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:35,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612817782] [2019-10-15 03:06:35,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:35,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:35,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 03:06:36,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612817782] [2019-10-15 03:06:36,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492604615] [2019-10-15 03:06:36,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:36,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 2877 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:06:36,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 03:06:36,904 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 03:06:37,229 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:06:37,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-15 03:06:37,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472067783] [2019-10-15 03:06:37,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:06:37,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:06:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:06:37,231 INFO L87 Difference]: Start difference. First operand 918 states and 1344 transitions. Second operand 4 states. [2019-10-15 03:06:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:37,556 INFO L93 Difference]: Finished difference Result 1883 states and 2821 transitions. [2019-10-15 03:06:37,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:37,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-10-15 03:06:37,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:37,569 INFO L225 Difference]: With dead ends: 1883 [2019-10-15 03:06:37,569 INFO L226 Difference]: Without dead ends: 996 [2019-10-15 03:06:37,575 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:06:37,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2019-10-15 03:06:37,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 996. [2019-10-15 03:06:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 996 states. [2019-10-15 03:06:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1490 transitions. [2019-10-15 03:06:37,645 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1490 transitions. Word has length 155 [2019-10-15 03:06:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:37,647 INFO L462 AbstractCegarLoop]: Abstraction has 996 states and 1490 transitions. [2019-10-15 03:06:37,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:06:37,647 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1490 transitions. [2019-10-15 03:06:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-15 03:06:37,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:37,654 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 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] [2019-10-15 03:06:37,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:37,864 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2056920944, now seen corresponding path program 1 times [2019-10-15 03:06:37,865 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:37,866 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112750551] [2019-10-15 03:06:37,866 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:37,866 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:37,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-15 03:06:38,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112750551] [2019-10-15 03:06:38,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338457894] [2019-10-15 03:06:38,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:38,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 2882 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:06:38,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 03:06:38,959 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-15 03:06:39,182 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:06:39,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 03:06:39,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502816572] [2019-10-15 03:06:39,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:06:39,184 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:39,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:06:39,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:39,185 INFO L87 Difference]: Start difference. First operand 996 states and 1490 transitions. Second operand 4 states. [2019-10-15 03:06:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:40,103 INFO L93 Difference]: Finished difference Result 2039 states and 3111 transitions. [2019-10-15 03:06:40,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:40,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2019-10-15 03:06:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:40,114 INFO L225 Difference]: With dead ends: 2039 [2019-10-15 03:06:40,114 INFO L226 Difference]: Without dead ends: 1074 [2019-10-15 03:06:40,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:06:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2019-10-15 03:06:40,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1074. [2019-10-15 03:06:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1074 states. [2019-10-15 03:06:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1636 transitions. [2019-10-15 03:06:40,187 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1636 transitions. Word has length 160 [2019-10-15 03:06:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:40,188 INFO L462 AbstractCegarLoop]: Abstraction has 1074 states and 1636 transitions. [2019-10-15 03:06:40,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:06:40,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1636 transitions. [2019-10-15 03:06:40,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-15 03:06:40,198 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:40,198 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:40,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:40,409 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:40,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:40,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1390275776, now seen corresponding path program 1 times [2019-10-15 03:06:40,411 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:40,411 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301569957] [2019-10-15 03:06:40,411 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:40,412 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:40,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-15 03:06:40,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301569957] [2019-10-15 03:06:40,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727174944] [2019-10-15 03:06:40,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:41,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 2886 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:06:41,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 03:06:41,281 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-15 03:06:41,565 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:06:41,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 03:06:41,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966176590] [2019-10-15 03:06:41,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:06:41,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:41,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:06:41,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:41,568 INFO L87 Difference]: Start difference. First operand 1074 states and 1636 transitions. Second operand 4 states. [2019-10-15 03:06:41,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:41,999 INFO L93 Difference]: Finished difference Result 2195 states and 3401 transitions. [2019-10-15 03:06:42,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:42,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-10-15 03:06:42,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:42,010 INFO L225 Difference]: With dead ends: 2195 [2019-10-15 03:06:42,010 INFO L226 Difference]: Without dead ends: 1152 [2019-10-15 03:06:42,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 325 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:06:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2019-10-15 03:06:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2019-10-15 03:06:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2019-10-15 03:06:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1782 transitions. [2019-10-15 03:06:42,094 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1782 transitions. Word has length 164 [2019-10-15 03:06:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:42,095 INFO L462 AbstractCegarLoop]: Abstraction has 1152 states and 1782 transitions. [2019-10-15 03:06:42,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:06:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1782 transitions. [2019-10-15 03:06:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-15 03:06:42,102 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:42,102 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:42,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:42,311 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:42,312 INFO L82 PathProgramCache]: Analyzing trace with hash -589313700, now seen corresponding path program 1 times [2019-10-15 03:06:42,313 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:42,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276908012] [2019-10-15 03:06:42,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:42,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:42,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-15 03:06:42,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276908012] [2019-10-15 03:06:42,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458070944] [2019-10-15 03:06:42,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:43,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:06:43,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 03:06:43,327 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-15 03:06:43,589 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:06:43,589 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 03:06:43,589 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894077874] [2019-10-15 03:06:43,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:06:43,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:43,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:06:43,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:43,591 INFO L87 Difference]: Start difference. First operand 1152 states and 1782 transitions. Second operand 4 states. [2019-10-15 03:06:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:43,866 INFO L93 Difference]: Finished difference Result 2351 states and 3691 transitions. [2019-10-15 03:06:43,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:43,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-10-15 03:06:43,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:43,877 INFO L225 Difference]: With dead ends: 2351 [2019-10-15 03:06:43,877 INFO L226 Difference]: Without dead ends: 1230 [2019-10-15 03:06:43,883 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 331 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:06:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2019-10-15 03:06:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1230. [2019-10-15 03:06:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1230 states. [2019-10-15 03:06:43,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1928 transitions. [2019-10-15 03:06:43,936 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1928 transitions. Word has length 167 [2019-10-15 03:06:43,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:43,937 INFO L462 AbstractCegarLoop]: Abstraction has 1230 states and 1928 transitions. [2019-10-15 03:06:43,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:06:43,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1928 transitions. [2019-10-15 03:06:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-15 03:06:43,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:43,942 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 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] [2019-10-15 03:06:44,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:44,158 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:44,160 INFO L82 PathProgramCache]: Analyzing trace with hash 688319882, now seen corresponding path program 1 times [2019-10-15 03:06:44,161 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:44,162 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533658833] [2019-10-15 03:06:44,163 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:44,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:44,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 03:06:44,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533658833] [2019-10-15 03:06:44,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952208496] [2019-10-15 03:06:44,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:45,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 2885 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-15 03:06:45,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-15 03:06:45,358 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:45,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:06:45,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:06:45,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:06:45,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:06:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 03:06:45,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [223574916] [2019-10-15 03:06:46,033 INFO L162 IcfgInterpreter]: Started Sifa with 131 locations of interest [2019-10-15 03:06:46,033 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:06:46,045 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:06:46,058 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:06:46,059 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs