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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:08:47,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:47,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:47,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:47,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:47,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:47,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:47,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:47,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:47,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:47,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:47,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:47,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:47,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:47,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:47,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:47,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:47,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:47,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:47,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:47,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:47,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:47,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:47,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:47,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:47,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:47,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:47,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:47,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:47,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:47,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:47,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:47,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:47,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:47,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:47,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:47,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:47,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:47,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:47,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:47,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:47,252 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 01:08:47,267 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:47,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:47,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:47,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:47,269 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:47,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:47,270 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:47,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:47,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:47,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:47,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:47,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:47,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:47,271 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:47,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:47,271 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:47,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:47,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:47,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:47,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:47,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:47,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:47,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:47,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:47,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:47,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:47,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:47,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:47,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:08:47,552 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:47,577 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:47,581 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:47,582 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:47,583 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:47,585 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product22.cil.c [2019-10-15 01:08:47,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/123c98041/1752d9185c9e490abcccc790fb9bcd62/FLAGcb8f27832 [2019-10-15 01:08:48,285 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:48,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product22.cil.c [2019-10-15 01:08:48,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/123c98041/1752d9185c9e490abcccc790fb9bcd62/FLAGcb8f27832 [2019-10-15 01:08:48,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/123c98041/1752d9185c9e490abcccc790fb9bcd62 [2019-10-15 01:08:48,534 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:48,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:48,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:48,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:48,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:48,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:48" (1/1) ... [2019-10-15 01:08:48,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52986215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:48, skipping insertion in model container [2019-10-15 01:08:48,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:48" (1/1) ... [2019-10-15 01:08:48,555 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:48,645 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:49,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:49,384 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:49,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:49,601 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:49,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:49 WrapperNode [2019-10-15 01:08:49,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:49,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:49,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:49,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:49,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:49" (1/1) ... [2019-10-15 01:08:49,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:49" (1/1) ... [2019-10-15 01:08:49,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:49" (1/1) ... [2019-10-15 01:08:49,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:49" (1/1) ... [2019-10-15 01:08:49,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:49" (1/1) ... [2019-10-15 01:08:49,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:49" (1/1) ... [2019-10-15 01:08:49,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:49" (1/1) ... [2019-10-15 01:08:49,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:49,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:49,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:49,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:49,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:49" (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 01:08:49,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:49,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:49,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:49,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:49,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:49,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:49,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:49,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:49,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:49,906 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:49,906 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:49,907 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:49,907 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:49,908 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:49,908 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:49,908 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:49,912 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:49,912 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:49,912 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:49,912 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:49,912 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:49,913 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:49,913 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:49,913 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:49,913 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:49,913 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:49,914 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:49,914 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:49,914 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:49,914 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:49,914 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:49,914 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:49,915 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:49,915 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:49,915 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:49,915 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:49,916 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:49,916 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:49,916 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:49,916 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:49,917 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:49,917 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:49,917 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:49,917 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:08:49,918 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:49,918 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:08:49,918 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:49,919 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:49,919 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:49,919 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:49,919 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:49,921 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:49,921 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:49,921 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 01:08:49,922 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:49,922 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:49,922 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:49,923 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 01:08:49,923 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:49,924 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:49,924 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:49,924 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-10-15 01:08:49,924 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:49,925 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-10-15 01:08:49,925 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:49,926 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:49,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:49,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:49,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:49,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:49,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:49,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:49,928 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:49,929 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:49,929 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:49,929 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:49,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:49,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:49,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:49,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:49,950 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:49,955 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:49,955 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:49,955 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:49,956 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:49,956 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:49,957 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:49,958 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:08:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:08:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 01:08:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 01:08:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-10-15 01:08:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-10-15 01:08:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:52,504 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:52,505 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:52,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:52 BoogieIcfgContainer [2019-10-15 01:08:52,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:52,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:52,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:52,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:52,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:48" (1/3) ... [2019-10-15 01:08:52,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22dac3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:52, skipping insertion in model container [2019-10-15 01:08:52,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:49" (2/3) ... [2019-10-15 01:08:52,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22dac3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:52, skipping insertion in model container [2019-10-15 01:08:52,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:52" (3/3) ... [2019-10-15 01:08:52,516 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product22.cil.c [2019-10-15 01:08:52,526 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:52,537 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:52,549 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:52,595 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:52,595 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:52,595 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:52,595 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:52,595 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:52,596 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:52,596 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:52,596 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:52,642 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states. [2019-10-15 01:08:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:08:52,673 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:52,675 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:52,678 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:52,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:52,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1159872126, now seen corresponding path program 1 times [2019-10-15 01:08:52,696 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:52,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314022398] [2019-10-15 01:08:52,697 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:52,697 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:52,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:53,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314022398] [2019-10-15 01:08:53,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433744618] [2019-10-15 01:08:53,440 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 01:08:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:54,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:08:54,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:54,218 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:54,414 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:54,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:08:54,415 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477159178] [2019-10-15 01:08:54,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:08:54,423 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:54,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:08:54,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:54,444 INFO L87 Difference]: Start difference. First operand 790 states. Second operand 2 states. [2019-10-15 01:08:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:54,550 INFO L93 Difference]: Finished difference Result 666 states and 1058 transitions. [2019-10-15 01:08:54,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:08:54,552 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-15 01:08:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:54,577 INFO L225 Difference]: With dead ends: 666 [2019-10-15 01:08:54,577 INFO L226 Difference]: Without dead ends: 629 [2019-10-15 01:08:54,582 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-15 01:08:54,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-10-15 01:08:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-15 01:08:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1003 transitions. [2019-10-15 01:08:54,704 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1003 transitions. Word has length 116 [2019-10-15 01:08:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:54,707 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1003 transitions. [2019-10-15 01:08:54,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:08:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1003 transitions. [2019-10-15 01:08:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:08:54,712 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:54,712 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:54,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:54,916 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:54,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:54,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1060701681, now seen corresponding path program 1 times [2019-10-15 01:08:54,917 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:54,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177725279] [2019-10-15 01:08:54,918 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:54,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:54,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:55,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177725279] [2019-10-15 01:08:55,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323388145] [2019-10-15 01:08:55,173 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 01:08:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:55,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:55,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:55,783 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:56,042 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:56,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:56,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328640911] [2019-10-15 01:08:56,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:56,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:56,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:56,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:56,045 INFO L87 Difference]: Start difference. First operand 629 states and 1003 transitions. Second operand 4 states. [2019-10-15 01:08:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:56,140 INFO L93 Difference]: Finished difference Result 1230 states and 1979 transitions. [2019-10-15 01:08:56,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:56,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-15 01:08:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:56,147 INFO L225 Difference]: With dead ends: 1230 [2019-10-15 01:08:56,148 INFO L226 Difference]: Without dead ends: 629 [2019-10-15 01:08:56,153 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-15 01:08:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-10-15 01:08:56,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-15 01:08:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1002 transitions. [2019-10-15 01:08:56,197 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1002 transitions. Word has length 118 [2019-10-15 01:08:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:56,197 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1002 transitions. [2019-10-15 01:08:56,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1002 transitions. [2019-10-15 01:08:56,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 01:08:56,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:56,200 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:56,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:56,408 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1607555785, now seen corresponding path program 1 times [2019-10-15 01:08:56,409 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:56,410 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196613694] [2019-10-15 01:08:56,410 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:56,410 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:56,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:56,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196613694] [2019-10-15 01:08:56,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956314619] [2019-10-15 01:08:56,570 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 01:08:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:57,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:57,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:57,242 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:57,446 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:57,446 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:57,446 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939993715] [2019-10-15 01:08:57,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:57,447 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:57,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:57,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:57,448 INFO L87 Difference]: Start difference. First operand 629 states and 1002 transitions. Second operand 4 states. [2019-10-15 01:08:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:57,528 INFO L93 Difference]: Finished difference Result 1230 states and 1977 transitions. [2019-10-15 01:08:57,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:57,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-15 01:08:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:57,534 INFO L225 Difference]: With dead ends: 1230 [2019-10-15 01:08:57,535 INFO L226 Difference]: Without dead ends: 629 [2019-10-15 01:08:57,538 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-15 01:08:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-10-15 01:08:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-15 01:08:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1001 transitions. [2019-10-15 01:08:57,570 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1001 transitions. Word has length 120 [2019-10-15 01:08:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:57,570 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1001 transitions. [2019-10-15 01:08:57,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1001 transitions. [2019-10-15 01:08:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 01:08:57,574 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:57,574 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:57,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:57,782 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:57,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:57,783 INFO L82 PathProgramCache]: Analyzing trace with hash -104433287, now seen corresponding path program 1 times [2019-10-15 01:08:57,783 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:57,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786679182] [2019-10-15 01:08:57,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,785 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:57,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786679182] [2019-10-15 01:08:57,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873078312] [2019-10-15 01:08:57,923 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 01:08:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:58,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:58,592 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:58,809 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:58,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:58,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691729641] [2019-10-15 01:08:58,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:58,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:58,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:58,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:58,812 INFO L87 Difference]: Start difference. First operand 629 states and 1001 transitions. Second operand 4 states. [2019-10-15 01:08:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:58,894 INFO L93 Difference]: Finished difference Result 1237 states and 1984 transitions. [2019-10-15 01:08:58,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:58,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-15 01:08:58,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:58,902 INFO L225 Difference]: With dead ends: 1237 [2019-10-15 01:08:58,904 INFO L226 Difference]: Without dead ends: 638 [2019-10-15 01:08:58,907 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-10-15 01:08:58,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-10-15 01:08:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-10-15 01:08:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1013 transitions. [2019-10-15 01:08:58,941 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1013 transitions. Word has length 122 [2019-10-15 01:08:58,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:58,941 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 1013 transitions. [2019-10-15 01:08:58,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:58,942 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1013 transitions. [2019-10-15 01:08:58,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:08:58,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:58,947 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:59,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:59,155 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:59,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:59,155 INFO L82 PathProgramCache]: Analyzing trace with hash -730714916, now seen corresponding path program 1 times [2019-10-15 01:08:59,156 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:59,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098048772] [2019-10-15 01:08:59,156 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:59,156 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:59,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:59,302 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098048772] [2019-10-15 01:08:59,302 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863871984] [2019-10-15 01:08:59,303 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 01:08:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:59,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:00,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:00,036 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:00,232 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:00,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:00,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205561421] [2019-10-15 01:09:00,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:00,233 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:00,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:00,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:00,234 INFO L87 Difference]: Start difference. First operand 638 states and 1013 transitions. Second operand 4 states. [2019-10-15 01:09:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:00,311 INFO L93 Difference]: Finished difference Result 1239 states and 1985 transitions. [2019-10-15 01:09:00,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:00,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-15 01:09:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:00,317 INFO L225 Difference]: With dead ends: 1239 [2019-10-15 01:09:00,318 INFO L226 Difference]: Without dead ends: 638 [2019-10-15 01:09:00,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-10-15 01:09:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-10-15 01:09:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-10-15 01:09:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1012 transitions. [2019-10-15 01:09:00,346 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1012 transitions. Word has length 123 [2019-10-15 01:09:00,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:00,346 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 1012 transitions. [2019-10-15 01:09:00,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:00,347 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1012 transitions. [2019-10-15 01:09:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 01:09:00,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:00,349 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:00,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:00,558 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:00,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:00,558 INFO L82 PathProgramCache]: Analyzing trace with hash -212076067, now seen corresponding path program 1 times [2019-10-15 01:09:00,559 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:00,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750857359] [2019-10-15 01:09:00,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,560 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:00,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750857359] [2019-10-15 01:09:00,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329210198] [2019-10-15 01:09:00,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:01,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:01,304 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:01,490 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:01,490 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:01,490 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600464945] [2019-10-15 01:09:01,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:01,491 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:01,492 INFO L87 Difference]: Start difference. First operand 638 states and 1012 transitions. Second operand 4 states. [2019-10-15 01:09:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:01,566 INFO L93 Difference]: Finished difference Result 1239 states and 1984 transitions. [2019-10-15 01:09:01,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:01,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-15 01:09:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:01,572 INFO L225 Difference]: With dead ends: 1239 [2019-10-15 01:09:01,573 INFO L226 Difference]: Without dead ends: 638 [2019-10-15 01:09:01,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 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 01:09:01,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-10-15 01:09:01,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-10-15 01:09:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-10-15 01:09:01,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1011 transitions. [2019-10-15 01:09:01,599 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1011 transitions. Word has length 124 [2019-10-15 01:09:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:01,599 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 1011 transitions. [2019-10-15 01:09:01,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:01,600 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1011 transitions. [2019-10-15 01:09:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:09:01,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:01,602 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:01,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:01,811 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:01,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1439359232, now seen corresponding path program 1 times [2019-10-15 01:09:01,812 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:01,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295080187] [2019-10-15 01:09:01,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:01,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295080187] [2019-10-15 01:09:01,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012182952] [2019-10-15 01:09:01,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:02,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:02,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:02,788 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:03,176 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:03,176 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-15 01:09:03,176 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120227428] [2019-10-15 01:09:03,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:09:03,178 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:03,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:09:03,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:03,178 INFO L87 Difference]: Start difference. First operand 638 states and 1011 transitions. Second operand 7 states. [2019-10-15 01:09:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:03,345 INFO L93 Difference]: Finished difference Result 1246 states and 1993 transitions. [2019-10-15 01:09:03,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:03,346 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2019-10-15 01:09:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:03,353 INFO L225 Difference]: With dead ends: 1246 [2019-10-15 01:09:03,353 INFO L226 Difference]: Without dead ends: 649 [2019-10-15 01:09:03,357 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:09:03,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2019-10-15 01:09:03,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 645. [2019-10-15 01:09:03,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-15 01:09:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1021 transitions. [2019-10-15 01:09:03,390 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1021 transitions. Word has length 125 [2019-10-15 01:09:03,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:03,390 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1021 transitions. [2019-10-15 01:09:03,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:09:03,391 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1021 transitions. [2019-10-15 01:09:03,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-15 01:09:03,394 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:03,394 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:03,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:03,604 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:03,605 INFO L82 PathProgramCache]: Analyzing trace with hash 438750369, now seen corresponding path program 1 times [2019-10-15 01:09:03,605 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:03,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790775103] [2019-10-15 01:09:03,605 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,605 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:03,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790775103] [2019-10-15 01:09:03,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765519999] [2019-10-15 01:09:03,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:04,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:04,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:04,685 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:05,004 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:05,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 10 [2019-10-15 01:09:05,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835665945] [2019-10-15 01:09:05,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:09:05,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:05,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:09:05,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:05,006 INFO L87 Difference]: Start difference. First operand 645 states and 1021 transitions. Second operand 7 states. [2019-10-15 01:09:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:05,158 INFO L93 Difference]: Finished difference Result 1252 states and 2002 transitions. [2019-10-15 01:09:05,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:05,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2019-10-15 01:09:05,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:05,166 INFO L225 Difference]: With dead ends: 1252 [2019-10-15 01:09:05,166 INFO L226 Difference]: Without dead ends: 652 [2019-10-15 01:09:05,171 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 242 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2019-10-15 01:09:05,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 648. [2019-10-15 01:09:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2019-10-15 01:09:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1026 transitions. [2019-10-15 01:09:05,216 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1026 transitions. Word has length 126 [2019-10-15 01:09:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:05,218 INFO L462 AbstractCegarLoop]: Abstraction has 648 states and 1026 transitions. [2019-10-15 01:09:05,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:09:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1026 transitions. [2019-10-15 01:09:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-15 01:09:05,221 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:05,221 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:05,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:05,424 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:05,424 INFO L82 PathProgramCache]: Analyzing trace with hash -499781246, now seen corresponding path program 1 times [2019-10-15 01:09:05,424 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:05,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134153587] [2019-10-15 01:09:05,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:05,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:05,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:05,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134153587] [2019-10-15 01:09:05,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716003023] [2019-10-15 01:09:05,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:06,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:06,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:06,217 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:06,494 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:06,494 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:06,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859874085] [2019-10-15 01:09:06,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:06,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:06,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:06,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:06,500 INFO L87 Difference]: Start difference. First operand 648 states and 1026 transitions. Second operand 4 states. [2019-10-15 01:09:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:06,678 INFO L93 Difference]: Finished difference Result 1257 states and 2012 transitions. [2019-10-15 01:09:06,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:06,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-10-15 01:09:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:06,684 INFO L225 Difference]: With dead ends: 1257 [2019-10-15 01:09:06,684 INFO L226 Difference]: Without dead ends: 648 [2019-10-15 01:09:06,687 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2019-10-15 01:09:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2019-10-15 01:09:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2019-10-15 01:09:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1021 transitions. [2019-10-15 01:09:06,712 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1021 transitions. Word has length 126 [2019-10-15 01:09:06,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:06,713 INFO L462 AbstractCegarLoop]: Abstraction has 648 states and 1021 transitions. [2019-10-15 01:09:06,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1021 transitions. [2019-10-15 01:09:06,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 01:09:06,715 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:06,715 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:06,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:06,925 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:06,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1419215856, now seen corresponding path program 1 times [2019-10-15 01:09:06,925 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:06,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222391955] [2019-10-15 01:09:06,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:07,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222391955] [2019-10-15 01:09:07,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583727190] [2019-10-15 01:09:07,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:08,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:08,185 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:08,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:08,814 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:08,814 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:08,814 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382414496] [2019-10-15 01:09:08,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:08,817 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:08,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:08,817 INFO L87 Difference]: Start difference. First operand 648 states and 1021 transitions. Second operand 9 states. [2019-10-15 01:09:09,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:09,037 INFO L93 Difference]: Finished difference Result 1261 states and 2006 transitions. [2019-10-15 01:09:09,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:09,038 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2019-10-15 01:09:09,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:09,043 INFO L225 Difference]: With dead ends: 1261 [2019-10-15 01:09:09,044 INFO L226 Difference]: Without dead ends: 658 [2019-10-15 01:09:09,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 243 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:09,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2019-10-15 01:09:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 652. [2019-10-15 01:09:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2019-10-15 01:09:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1027 transitions. [2019-10-15 01:09:09,080 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1027 transitions. Word has length 129 [2019-10-15 01:09:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:09,081 INFO L462 AbstractCegarLoop]: Abstraction has 652 states and 1027 transitions. [2019-10-15 01:09:09,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1027 transitions. [2019-10-15 01:09:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 01:09:09,083 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:09,083 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:09,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:09,292 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:09,292 INFO L82 PathProgramCache]: Analyzing trace with hash -140160693, now seen corresponding path program 1 times [2019-10-15 01:09:09,292 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:09,292 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489881031] [2019-10-15 01:09:09,293 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,293 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:09,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489881031] [2019-10-15 01:09:09,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475930272] [2019-10-15 01:09:09,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:10,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:10,162 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:10,336 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:10,336 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:10,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547130964] [2019-10-15 01:09:10,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:10,337 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:10,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:10,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:10,337 INFO L87 Difference]: Start difference. First operand 652 states and 1027 transitions. Second operand 4 states. [2019-10-15 01:09:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:10,490 INFO L93 Difference]: Finished difference Result 1267 states and 2018 transitions. [2019-10-15 01:09:10,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:10,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-15 01:09:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:10,496 INFO L225 Difference]: With dead ends: 1267 [2019-10-15 01:09:10,496 INFO L226 Difference]: Without dead ends: 652 [2019-10-15 01:09:10,508 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2019-10-15 01:09:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 652. [2019-10-15 01:09:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2019-10-15 01:09:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1022 transitions. [2019-10-15 01:09:10,539 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1022 transitions. Word has length 127 [2019-10-15 01:09:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:10,539 INFO L462 AbstractCegarLoop]: Abstraction has 652 states and 1022 transitions. [2019-10-15 01:09:10,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1022 transitions. [2019-10-15 01:09:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:10,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:10,542 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:10,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:10,758 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:10,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:10,758 INFO L82 PathProgramCache]: Analyzing trace with hash 318446103, now seen corresponding path program 1 times [2019-10-15 01:09:10,758 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:10,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212714499] [2019-10-15 01:09:10,758 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:10,759 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:10,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:10,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212714499] [2019-10-15 01:09:10,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242398121] [2019-10-15 01:09:10,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:11,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:11,606 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:12,017 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:12,018 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:12,018 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592595320] [2019-10-15 01:09:12,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:12,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:12,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:12,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:12,019 INFO L87 Difference]: Start difference. First operand 652 states and 1022 transitions. Second operand 11 states. [2019-10-15 01:09:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:12,146 INFO L93 Difference]: Finished difference Result 1191 states and 1893 transitions. [2019-10-15 01:09:12,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:12,147 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-15 01:09:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:12,151 INFO L225 Difference]: With dead ends: 1191 [2019-10-15 01:09:12,152 INFO L226 Difference]: Without dead ends: 666 [2019-10-15 01:09:12,155 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:12,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-15 01:09:12,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 658. [2019-10-15 01:09:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2019-10-15 01:09:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1033 transitions. [2019-10-15 01:09:12,189 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1033 transitions. Word has length 130 [2019-10-15 01:09:12,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:12,190 INFO L462 AbstractCegarLoop]: Abstraction has 658 states and 1033 transitions. [2019-10-15 01:09:12,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:12,190 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1033 transitions. [2019-10-15 01:09:12,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:09:12,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:12,193 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:12,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:12,402 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:12,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1696867595, now seen corresponding path program 1 times [2019-10-15 01:09:12,402 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:12,402 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107156236] [2019-10-15 01:09:12,403 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:12,403 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:12,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:12,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107156236] [2019-10-15 01:09:12,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647041678] [2019-10-15 01:09:12,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:13,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:13,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:13,243 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:13,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:13,682 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:13,682 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:13,682 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043728487] [2019-10-15 01:09:13,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:13,684 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:13,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:13,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:13,685 INFO L87 Difference]: Start difference. First operand 658 states and 1033 transitions. Second operand 14 states. [2019-10-15 01:09:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:13,963 INFO L93 Difference]: Finished difference Result 1191 states and 1891 transitions. [2019-10-15 01:09:13,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:09:13,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2019-10-15 01:09:13,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:13,968 INFO L225 Difference]: With dead ends: 1191 [2019-10-15 01:09:13,968 INFO L226 Difference]: Without dead ends: 666 [2019-10-15 01:09:13,971 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 248 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:13,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-15 01:09:13,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 656. [2019-10-15 01:09:13,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2019-10-15 01:09:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1028 transitions. [2019-10-15 01:09:13,993 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1028 transitions. Word has length 131 [2019-10-15 01:09:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:13,993 INFO L462 AbstractCegarLoop]: Abstraction has 656 states and 1028 transitions. [2019-10-15 01:09:13,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:09:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1028 transitions. [2019-10-15 01:09:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 01:09:13,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:13,996 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:14,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:14,204 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:14,204 INFO L82 PathProgramCache]: Analyzing trace with hash 49953892, now seen corresponding path program 1 times [2019-10-15 01:09:14,204 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:14,204 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176991426] [2019-10-15 01:09:14,205 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:14,205 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:14,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:14,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176991426] [2019-10-15 01:09:14,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15751215] [2019-10-15 01:09:14,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:15,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:15,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:15,114 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:15,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:15,534 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:15,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-15 01:09:15,535 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68926464] [2019-10-15 01:09:15,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:15,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:15,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:15,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:15,537 INFO L87 Difference]: Start difference. First operand 656 states and 1028 transitions. Second operand 11 states. [2019-10-15 01:09:15,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:15,710 INFO L93 Difference]: Finished difference Result 1194 states and 1901 transitions. [2019-10-15 01:09:15,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:15,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-15 01:09:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:15,716 INFO L225 Difference]: With dead ends: 1194 [2019-10-15 01:09:15,716 INFO L226 Difference]: Without dead ends: 669 [2019-10-15 01:09:15,719 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 251 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:15,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2019-10-15 01:09:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 667. [2019-10-15 01:09:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2019-10-15 01:09:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1051 transitions. [2019-10-15 01:09:15,754 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1051 transitions. Word has length 132 [2019-10-15 01:09:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:15,755 INFO L462 AbstractCegarLoop]: Abstraction has 667 states and 1051 transitions. [2019-10-15 01:09:15,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1051 transitions. [2019-10-15 01:09:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:15,757 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:15,758 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:15,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:15,966 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:15,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1086532538, now seen corresponding path program 1 times [2019-10-15 01:09:15,967 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:15,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562766362] [2019-10-15 01:09:15,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:15,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:15,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:16,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562766362] [2019-10-15 01:09:16,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619382356] [2019-10-15 01:09:16,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:16,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:16,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:16,882 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:17,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:17,229 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:17,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-15 01:09:17,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288199276] [2019-10-15 01:09:17,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:17,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:17,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:17,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:17,231 INFO L87 Difference]: Start difference. First operand 667 states and 1051 transitions. Second operand 9 states. [2019-10-15 01:09:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:17,361 INFO L93 Difference]: Finished difference Result 1298 states and 2092 transitions. [2019-10-15 01:09:17,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:17,362 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-15 01:09:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:17,366 INFO L225 Difference]: With dead ends: 1298 [2019-10-15 01:09:17,366 INFO L226 Difference]: Without dead ends: 676 [2019-10-15 01:09:17,375 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2019-10-15 01:09:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 674. [2019-10-15 01:09:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 674 states. [2019-10-15 01:09:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1059 transitions. [2019-10-15 01:09:17,404 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1059 transitions. Word has length 133 [2019-10-15 01:09:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:17,407 INFO L462 AbstractCegarLoop]: Abstraction has 674 states and 1059 transitions. [2019-10-15 01:09:17,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1059 transitions. [2019-10-15 01:09:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-15 01:09:17,413 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:17,413 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:17,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:17,622 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:17,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:17,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1561218149, now seen corresponding path program 1 times [2019-10-15 01:09:17,622 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:17,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417967746] [2019-10-15 01:09:17,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:17,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417967746] [2019-10-15 01:09:17,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064501776] [2019-10-15 01:09:17,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:18,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:18,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:18,654 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:18,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:18,921 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:18,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-15 01:09:18,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640696044] [2019-10-15 01:09:18,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:18,922 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:18,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:18,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:18,922 INFO L87 Difference]: Start difference. First operand 674 states and 1059 transitions. Second operand 8 states. [2019-10-15 01:09:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:19,046 INFO L93 Difference]: Finished difference Result 1312 states and 2100 transitions. [2019-10-15 01:09:19,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:09:19,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-10-15 01:09:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:19,051 INFO L225 Difference]: With dead ends: 1312 [2019-10-15 01:09:19,051 INFO L226 Difference]: Without dead ends: 683 [2019-10-15 01:09:19,055 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:09:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2019-10-15 01:09:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 678. [2019-10-15 01:09:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2019-10-15 01:09:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1065 transitions. [2019-10-15 01:09:19,078 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1065 transitions. Word has length 134 [2019-10-15 01:09:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:19,079 INFO L462 AbstractCegarLoop]: Abstraction has 678 states and 1065 transitions. [2019-10-15 01:09:19,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1065 transitions. [2019-10-15 01:09:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-15 01:09:19,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:19,082 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:19,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:19,291 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:19,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:19,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1044824767, now seen corresponding path program 1 times [2019-10-15 01:09:19,291 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:19,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011389246] [2019-10-15 01:09:19,292 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:19,292 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:19,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:19,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011389246] [2019-10-15 01:09:19,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291800674] [2019-10-15 01:09:19,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:20,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:09:20,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:09:20,338 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:20,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:20,954 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:09:21,087 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:21,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [4] total 19 [2019-10-15 01:09:21,087 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159568776] [2019-10-15 01:09:21,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:09:21,088 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:21,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:09:21,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:09:21,088 INFO L87 Difference]: Start difference. First operand 678 states and 1065 transitions. Second operand 17 states. [2019-10-15 01:09:21,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:21,476 INFO L93 Difference]: Finished difference Result 1224 states and 1948 transitions. [2019-10-15 01:09:21,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 01:09:21,477 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2019-10-15 01:09:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:21,482 INFO L225 Difference]: With dead ends: 1224 [2019-10-15 01:09:21,482 INFO L226 Difference]: Without dead ends: 699 [2019-10-15 01:09:21,485 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:09:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-10-15 01:09:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 687. [2019-10-15 01:09:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2019-10-15 01:09:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1080 transitions. [2019-10-15 01:09:21,509 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1080 transitions. Word has length 135 [2019-10-15 01:09:21,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:21,510 INFO L462 AbstractCegarLoop]: Abstraction has 687 states and 1080 transitions. [2019-10-15 01:09:21,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:09:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1080 transitions. [2019-10-15 01:09:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-15 01:09:21,513 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:21,514 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:21,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:21,722 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:21,723 INFO L82 PathProgramCache]: Analyzing trace with hash -136444597, now seen corresponding path program 1 times [2019-10-15 01:09:21,723 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:21,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449422503] [2019-10-15 01:09:21,723 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:21,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:21,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:21,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449422503] [2019-10-15 01:09:21,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932616301] [2019-10-15 01:09:21,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true