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_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:08:43,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:43,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:43,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:43,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:43,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:43,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:43,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:43,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:43,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:43,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:43,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:43,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:43,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:43,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:43,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:43,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:43,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:43,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:43,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:43,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:43,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:43,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:43,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:43,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:43,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:43,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:43,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:43,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:43,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:43,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:43,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:43,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:43,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:43,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:43,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:43,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:43,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:43,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:43,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:43,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:43,951 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 01:08:43,972 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:43,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:43,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:43,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:43,975 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:43,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:43,976 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:43,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:43,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:43,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:43,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:43,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:43,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:43,978 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:43,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:43,978 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:43,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:43,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:43,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:43,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:43,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:43,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:43,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:43,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:43,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:43,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:43,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:43,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:43,981 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 01:08:44,263 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:44,280 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:44,287 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:44,289 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:44,289 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:44,290 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product18.cil.c [2019-10-15 01:08:44,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c0ed475d/5ffa064d9f5745468559079ae96771a0/FLAG35b9d4eee [2019-10-15 01:08:45,023 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:45,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product18.cil.c [2019-10-15 01:08:45,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c0ed475d/5ffa064d9f5745468559079ae96771a0/FLAG35b9d4eee [2019-10-15 01:08:45,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c0ed475d/5ffa064d9f5745468559079ae96771a0 [2019-10-15 01:08:45,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:45,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:45,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:45,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:45,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:45,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:45" (1/1) ... [2019-10-15 01:08:45,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54b301cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:45, skipping insertion in model container [2019-10-15 01:08:45,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:45" (1/1) ... [2019-10-15 01:08:45,247 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:45,335 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:46,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:46,035 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:46,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:46,239 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:46,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:46 WrapperNode [2019-10-15 01:08:46,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:46,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:46,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:46,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:46,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:46" (1/1) ... [2019-10-15 01:08:46,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:46" (1/1) ... [2019-10-15 01:08:46,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:46" (1/1) ... [2019-10-15 01:08:46,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:46" (1/1) ... [2019-10-15 01:08:46,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:46" (1/1) ... [2019-10-15 01:08:46,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:46" (1/1) ... [2019-10-15 01:08:46,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:46" (1/1) ... [2019-10-15 01:08:46,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:46,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:46,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:46,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:46,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:46" (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 01:08:46,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:46,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:46,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:46,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:46,542 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:46,543 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:46,543 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:46,543 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:46,544 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:46,545 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:46,545 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:46,545 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:46,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:46,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:46,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:46,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:46,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:46,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:46,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:46,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:46,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:46,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:46,552 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:46,552 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:46,552 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:46,552 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:08:46,552 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:08:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:46,555 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:46,555 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:46,555 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:46,555 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:46,555 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2019-10-15 01:08:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__weight [2019-10-15 01:08:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:46,560 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:46,560 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:46,561 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:46,561 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:46,561 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:46,561 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:46,561 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:46,561 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:46,562 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:46,562 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:46,562 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:46,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:46,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:46,564 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:46,567 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:46,567 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:08:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:08:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2019-10-15 01:08:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__weight [2019-10-15 01:08:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:46,592 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:46,593 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:46,593 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:46,593 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:46,593 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:46,593 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:46,594 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:46,594 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:46,594 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:49,095 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:49,095 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:49,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:49 BoogieIcfgContainer [2019-10-15 01:08:49,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:49,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:49,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:49,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:49,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:45" (1/3) ... [2019-10-15 01:08:49,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7697444d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:49, skipping insertion in model container [2019-10-15 01:08:49,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:46" (2/3) ... [2019-10-15 01:08:49,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7697444d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:49, skipping insertion in model container [2019-10-15 01:08:49,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:49" (3/3) ... [2019-10-15 01:08:49,107 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product18.cil.c [2019-10-15 01:08:49,117 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:49,128 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:49,141 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:49,192 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:49,192 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:49,193 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:49,193 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:49,193 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:49,193 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:49,193 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:49,193 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:49,238 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states. [2019-10-15 01:08:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:08:49,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:49,273 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 01:08:49,278 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:49,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:49,286 INFO L82 PathProgramCache]: Analyzing trace with hash 126544023, now seen corresponding path program 1 times [2019-10-15 01:08:49,299 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:49,299 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3693257] [2019-10-15 01:08:49,299 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:49,300 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:49,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:49,948 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 01:08:49,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3693257] [2019-10-15 01:08:49,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459761759] [2019-10-15 01:08:49,950 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 01:08:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:50,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:08:50,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:50,662 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 01:08:50,662 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:50,865 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 01:08:50,867 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:50,868 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:08:50,868 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137121595] [2019-10-15 01:08:50,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:08:50,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:50,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:08:50,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:50,894 INFO L87 Difference]: Start difference. First operand 759 states. Second operand 2 states. [2019-10-15 01:08:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:50,984 INFO L93 Difference]: Finished difference Result 635 states and 1015 transitions. [2019-10-15 01:08:50,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:08:50,985 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-15 01:08:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:51,020 INFO L225 Difference]: With dead ends: 635 [2019-10-15 01:08:51,020 INFO L226 Difference]: Without dead ends: 598 [2019-10-15 01:08:51,026 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 01:08:51,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-15 01:08:51,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-15 01:08:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-15 01:08:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 960 transitions. [2019-10-15 01:08:51,146 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 960 transitions. Word has length 116 [2019-10-15 01:08:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:51,149 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 960 transitions. [2019-10-15 01:08:51,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:08:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 960 transitions. [2019-10-15 01:08:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:08:51,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:51,154 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 01:08:51,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:51,362 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:51,363 INFO L82 PathProgramCache]: Analyzing trace with hash 845887242, now seen corresponding path program 1 times [2019-10-15 01:08:51,363 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:51,364 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409024139] [2019-10-15 01:08:51,364 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:51,364 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:51,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:51,666 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 01:08:51,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409024139] [2019-10-15 01:08:51,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059631730] [2019-10-15 01:08:51,667 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 01:08:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:52,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:52,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:52,311 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 01:08:52,311 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:52,614 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 01:08:52,614 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:52,615 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:52,615 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164103583] [2019-10-15 01:08:52,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:52,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:52,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:52,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:52,618 INFO L87 Difference]: Start difference. First operand 598 states and 960 transitions. Second operand 4 states. [2019-10-15 01:08:52,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:52,779 INFO L93 Difference]: Finished difference Result 1168 states and 1893 transitions. [2019-10-15 01:08:52,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:52,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-15 01:08:52,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:52,793 INFO L225 Difference]: With dead ends: 1168 [2019-10-15 01:08:52,793 INFO L226 Difference]: Without dead ends: 598 [2019-10-15 01:08:52,802 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 01:08:52,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-15 01:08:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-15 01:08:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-15 01:08:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 959 transitions. [2019-10-15 01:08:52,867 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 959 transitions. Word has length 118 [2019-10-15 01:08:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:52,867 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 959 transitions. [2019-10-15 01:08:52,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:52,868 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 959 transitions. [2019-10-15 01:08:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 01:08:52,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:52,878 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 01:08:53,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:53,095 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:53,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:53,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1248298604, now seen corresponding path program 1 times [2019-10-15 01:08:53,096 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:53,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139135740] [2019-10-15 01:08:53,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:53,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:53,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:53,285 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 01:08:53,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139135740] [2019-10-15 01:08:53,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192488657] [2019-10-15 01:08:53,286 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 01:08:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:53,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:53,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:53,979 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 01:08:53,979 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:54,177 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 01:08:54,178 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:54,178 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:54,178 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586625885] [2019-10-15 01:08:54,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:54,179 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:54,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:54,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:54,180 INFO L87 Difference]: Start difference. First operand 598 states and 959 transitions. Second operand 4 states. [2019-10-15 01:08:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:54,252 INFO L93 Difference]: Finished difference Result 1168 states and 1891 transitions. [2019-10-15 01:08:54,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:54,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-15 01:08:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:54,257 INFO L225 Difference]: With dead ends: 1168 [2019-10-15 01:08:54,257 INFO L226 Difference]: Without dead ends: 598 [2019-10-15 01:08:54,261 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 01:08:54,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-15 01:08:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-15 01:08:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-15 01:08:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 958 transitions. [2019-10-15 01:08:54,288 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 958 transitions. Word has length 120 [2019-10-15 01:08:54,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:54,289 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 958 transitions. [2019-10-15 01:08:54,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:54,289 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 958 transitions. [2019-10-15 01:08:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 01:08:54,292 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:54,292 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 01:08:54,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:54,501 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1488778386, now seen corresponding path program 1 times [2019-10-15 01:08:54,503 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:54,503 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402696261] [2019-10-15 01:08:54,504 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:54,504 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:54,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:54,630 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 01:08:54,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402696261] [2019-10-15 01:08:54,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188833017] [2019-10-15 01:08:54,631 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 01:08:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:55,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:55,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:55,326 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 01:08:55,326 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:55,529 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 01:08:55,529 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:55,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:55,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24771393] [2019-10-15 01:08:55,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:55,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:55,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:55,531 INFO L87 Difference]: Start difference. First operand 598 states and 958 transitions. Second operand 4 states. [2019-10-15 01:08:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:55,606 INFO L93 Difference]: Finished difference Result 1175 states and 1898 transitions. [2019-10-15 01:08:55,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:55,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-15 01:08:55,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:55,612 INFO L225 Difference]: With dead ends: 1175 [2019-10-15 01:08:55,612 INFO L226 Difference]: Without dead ends: 607 [2019-10-15 01:08:55,615 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 01:08:55,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-15 01:08:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-15 01:08:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-15 01:08:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 970 transitions. [2019-10-15 01:08:55,641 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 970 transitions. Word has length 122 [2019-10-15 01:08:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:55,642 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 970 transitions. [2019-10-15 01:08:55,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 970 transitions. [2019-10-15 01:08:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:08:55,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:55,645 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 01:08:55,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:55,854 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:55,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:55,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1725323163, now seen corresponding path program 1 times [2019-10-15 01:08:55,855 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:55,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702911136] [2019-10-15 01:08:55,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:55,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:55,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:55,978 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 01:08:55,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702911136] [2019-10-15 01:08:55,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81723968] [2019-10-15 01:08:55,979 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 01:08:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:56,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:56,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:56,659 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 01:08:56,659 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:56,872 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 01:08:56,872 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:56,872 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:56,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849182385] [2019-10-15 01:08:56,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:56,874 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:56,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:56,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:56,874 INFO L87 Difference]: Start difference. First operand 607 states and 970 transitions. Second operand 4 states. [2019-10-15 01:08:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:56,970 INFO L93 Difference]: Finished difference Result 1177 states and 1899 transitions. [2019-10-15 01:08:56,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:56,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-15 01:08:56,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:56,982 INFO L225 Difference]: With dead ends: 1177 [2019-10-15 01:08:56,982 INFO L226 Difference]: Without dead ends: 607 [2019-10-15 01:08:56,988 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 01:08:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-15 01:08:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-15 01:08:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-15 01:08:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 969 transitions. [2019-10-15 01:08:57,013 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 969 transitions. Word has length 123 [2019-10-15 01:08:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:57,013 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 969 transitions. [2019-10-15 01:08:57,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 969 transitions. [2019-10-15 01:08:57,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 01:08:57,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:57,021 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 01:08:57,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:57,229 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:57,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:57,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1073190474, now seen corresponding path program 1 times [2019-10-15 01:08:57,230 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:57,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385601030] [2019-10-15 01:08:57,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:57,358 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 01:08:57,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385601030] [2019-10-15 01:08:57,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742193723] [2019-10-15 01:08:57,359 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 01:08:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:58,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:58,081 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 01:08:58,082 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:58,300 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 01:08:58,300 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:58,301 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:08:58,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525498532] [2019-10-15 01:08:58,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:58,304 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:58,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:08:58,306 INFO L87 Difference]: Start difference. First operand 607 states and 969 transitions. Second operand 4 states. [2019-10-15 01:08:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:58,404 INFO L93 Difference]: Finished difference Result 1177 states and 1898 transitions. [2019-10-15 01:08:58,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:58,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-15 01:08:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:58,419 INFO L225 Difference]: With dead ends: 1177 [2019-10-15 01:08:58,420 INFO L226 Difference]: Without dead ends: 607 [2019-10-15 01:08:58,425 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 01:08:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-15 01:08:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-15 01:08:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-15 01:08:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 968 transitions. [2019-10-15 01:08:58,460 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 968 transitions. Word has length 124 [2019-10-15 01:08:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:58,461 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 968 transitions. [2019-10-15 01:08:58,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 968 transitions. [2019-10-15 01:08:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:08:58,465 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:58,465 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 01:08:58,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:58,676 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:58,677 INFO L82 PathProgramCache]: Analyzing trace with hash 825732863, now seen corresponding path program 1 times [2019-10-15 01:08:58,677 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:58,677 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771938227] [2019-10-15 01:08:58,678 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:58,678 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:58,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,925 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 01:08:58,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771938227] [2019-10-15 01:08:58,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301089320] [2019-10-15 01:08:58,926 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 01:08:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:59,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:59,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:59,702 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 01:08:59,702 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:59,912 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 01:08:59,913 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:59,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:08:59,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92334699] [2019-10-15 01:08:59,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:59,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:59,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:59,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:08:59,915 INFO L87 Difference]: Start difference. First operand 607 states and 968 transitions. Second operand 4 states. [2019-10-15 01:09:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:00,087 INFO L93 Difference]: Finished difference Result 1176 states and 1898 transitions. [2019-10-15 01:09:00,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:00,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-15 01:09:00,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:00,094 INFO L225 Difference]: With dead ends: 1176 [2019-10-15 01:09:00,095 INFO L226 Difference]: Without dead ends: 607 [2019-10-15 01:09:00,099 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-15 01:09:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-15 01:09:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-15 01:09:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 963 transitions. [2019-10-15 01:09:00,125 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 963 transitions. Word has length 125 [2019-10-15 01:09:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:00,125 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 963 transitions. [2019-10-15 01:09:00,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 963 transitions. [2019-10-15 01:09:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 01:09:00,129 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:00,129 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 01:09:00,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:00,348 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:00,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:00,349 INFO L82 PathProgramCache]: Analyzing trace with hash -215123635, now seen corresponding path program 1 times [2019-10-15 01:09:00,349 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:00,349 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40839668] [2019-10-15 01:09:00,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:00,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40839668] [2019-10-15 01:09:00,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687697605] [2019-10-15 01:09:00,528 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 01:09:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:01,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:01,179 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 01:09:01,179 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:01,377 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 01:09:01,378 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:01,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:01,378 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728187628] [2019-10-15 01:09:01,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:01,379 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:01,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:01,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:01,380 INFO L87 Difference]: Start difference. First operand 607 states and 963 transitions. Second operand 4 states. [2019-10-15 01:09:01,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:01,568 INFO L93 Difference]: Finished difference Result 1176 states and 1888 transitions. [2019-10-15 01:09:01,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:01,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-15 01:09:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:01,576 INFO L225 Difference]: With dead ends: 1176 [2019-10-15 01:09:01,577 INFO L226 Difference]: Without dead ends: 607 [2019-10-15 01:09:01,583 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:01,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-15 01:09:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-15 01:09:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-15 01:09:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 958 transitions. [2019-10-15 01:09:01,615 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 958 transitions. Word has length 127 [2019-10-15 01:09:01,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:01,616 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 958 transitions. [2019-10-15 01:09:01,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 958 transitions. [2019-10-15 01:09:01,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 01:09:01,620 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:01,620 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] [2019-10-15 01:09:01,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:01,832 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:01,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash -585805579, now seen corresponding path program 1 times [2019-10-15 01:09:01,833 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:01,833 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640725750] [2019-10-15 01:09:01,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:02,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640725750] [2019-10-15 01:09:02,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008004826] [2019-10-15 01:09:02,055 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 01:09:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:02,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:02,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:02,760 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:02,961 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:02,961 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:02,961 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845156953] [2019-10-15 01:09:02,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:02,962 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:02,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:02,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:02,963 INFO L87 Difference]: Start difference. First operand 607 states and 958 transitions. Second operand 4 states. [2019-10-15 01:09:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:03,237 INFO L93 Difference]: Finished difference Result 1212 states and 1937 transitions. [2019-10-15 01:09:03,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:03,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-15 01:09:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:03,242 INFO L225 Difference]: With dead ends: 1212 [2019-10-15 01:09:03,242 INFO L226 Difference]: Without dead ends: 646 [2019-10-15 01:09:03,245 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:03,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2019-10-15 01:09:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2019-10-15 01:09:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2019-10-15 01:09:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1022 transitions. [2019-10-15 01:09:03,268 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1022 transitions. Word has length 129 [2019-10-15 01:09:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:03,269 INFO L462 AbstractCegarLoop]: Abstraction has 646 states and 1022 transitions. [2019-10-15 01:09:03,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1022 transitions. [2019-10-15 01:09:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:03,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:03,272 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] [2019-10-15 01:09:03,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:03,489 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1638975902, now seen corresponding path program 1 times [2019-10-15 01:09:03,489 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:03,490 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129765870] [2019-10-15 01:09:03,490 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,490 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:03,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129765870] [2019-10-15 01:09:03,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662976422] [2019-10-15 01:09:03,650 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 01:09:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:04,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:04,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:04,503 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:04,702 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:04,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:04,702 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660847545] [2019-10-15 01:09:04,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:04,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:04,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:04,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:04,706 INFO L87 Difference]: Start difference. First operand 646 states and 1022 transitions. Second operand 4 states. [2019-10-15 01:09:04,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:04,901 INFO L93 Difference]: Finished difference Result 1215 states and 1940 transitions. [2019-10-15 01:09:04,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:04,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-15 01:09:04,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:04,907 INFO L225 Difference]: With dead ends: 1215 [2019-10-15 01:09:04,907 INFO L226 Difference]: Without dead ends: 646 [2019-10-15 01:09:04,910 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:04,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2019-10-15 01:09:04,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2019-10-15 01:09:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2019-10-15 01:09:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1017 transitions. [2019-10-15 01:09:04,931 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1017 transitions. Word has length 130 [2019-10-15 01:09:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:04,931 INFO L462 AbstractCegarLoop]: Abstraction has 646 states and 1017 transitions. [2019-10-15 01:09:04,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1017 transitions. [2019-10-15 01:09:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:04,934 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:04,934 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 01:09:05,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:05,151 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash 44217569, now seen corresponding path program 1 times [2019-10-15 01:09:05,154 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:05,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021911668] [2019-10-15 01:09:05,154 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:05,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:05,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,277 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 01:09:05,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021911668] [2019-10-15 01:09:05,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008791585] [2019-10-15 01:09:05,278 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 01:09:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:05,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:06,078 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 01:09:06,078 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:06,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:06,531 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 01:09:06,531 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:06,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:06,532 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446389190] [2019-10-15 01:09:06,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:06,532 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:06,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:06,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:06,533 INFO L87 Difference]: Start difference. First operand 646 states and 1017 transitions. Second operand 9 states. [2019-10-15 01:09:06,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:06,767 INFO L93 Difference]: Finished difference Result 1228 states and 1954 transitions. [2019-10-15 01:09:06,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:06,767 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-10-15 01:09:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:06,773 INFO L225 Difference]: With dead ends: 1228 [2019-10-15 01:09:06,774 INFO L226 Difference]: Without dead ends: 662 [2019-10-15 01:09:06,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:06,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2019-10-15 01:09:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 655. [2019-10-15 01:09:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2019-10-15 01:09:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1030 transitions. [2019-10-15 01:09:06,811 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1030 transitions. Word has length 130 [2019-10-15 01:09:06,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:06,812 INFO L462 AbstractCegarLoop]: Abstraction has 655 states and 1030 transitions. [2019-10-15 01:09:06,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1030 transitions. [2019-10-15 01:09:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:09:06,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:06,816 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] [2019-10-15 01:09:07,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:07,024 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:07,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1802168655, now seen corresponding path program 1 times [2019-10-15 01:09:07,025 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:07,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428238578] [2019-10-15 01:09:07,026 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,026 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:07,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428238578] [2019-10-15 01:09:07,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633833806] [2019-10-15 01:09:07,146 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 01:09:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:07,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:07,861 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:08,115 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:08,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:08,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825432637] [2019-10-15 01:09:08,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:08,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:08,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:08,118 INFO L87 Difference]: Start difference. First operand 655 states and 1030 transitions. Second operand 4 states. [2019-10-15 01:09:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:08,301 INFO L93 Difference]: Finished difference Result 1229 states and 1957 transitions. [2019-10-15 01:09:08,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:08,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-15 01:09:08,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:08,308 INFO L225 Difference]: With dead ends: 1229 [2019-10-15 01:09:08,309 INFO L226 Difference]: Without dead ends: 655 [2019-10-15 01:09:08,313 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2019-10-15 01:09:08,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2019-10-15 01:09:08,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2019-10-15 01:09:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1025 transitions. [2019-10-15 01:09:08,347 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1025 transitions. Word has length 131 [2019-10-15 01:09:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:08,350 INFO L462 AbstractCegarLoop]: Abstraction has 655 states and 1025 transitions. [2019-10-15 01:09:08,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1025 transitions. [2019-10-15 01:09:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 01:09:08,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:08,354 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] [2019-10-15 01:09:08,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:08,574 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:08,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1497245732, now seen corresponding path program 1 times [2019-10-15 01:09:08,575 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:08,575 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736080505] [2019-10-15 01:09:08,575 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:08,575 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:08,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:08,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736080505] [2019-10-15 01:09:08,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499470829] [2019-10-15 01:09:08,709 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 01:09:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:09,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:09,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:09,405 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:09,712 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:09,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:09,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512607964] [2019-10-15 01:09:09,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:09,713 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:09,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:09,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:09,714 INFO L87 Difference]: Start difference. First operand 655 states and 1025 transitions. Second operand 11 states. [2019-10-15 01:09:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:09,874 INFO L93 Difference]: Finished difference Result 1166 states and 1851 transitions. [2019-10-15 01:09:09,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:09,875 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-15 01:09:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:09,879 INFO L225 Difference]: With dead ends: 1166 [2019-10-15 01:09:09,879 INFO L226 Difference]: Without dead ends: 672 [2019-10-15 01:09:09,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 255 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 01:09:09,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2019-10-15 01:09:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 662. [2019-10-15 01:09:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2019-10-15 01:09:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1035 transitions. [2019-10-15 01:09:09,904 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1035 transitions. Word has length 132 [2019-10-15 01:09:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:09,905 INFO L462 AbstractCegarLoop]: Abstraction has 662 states and 1035 transitions. [2019-10-15 01:09:09,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1035 transitions. [2019-10-15 01:09:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:09,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:09,908 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:10,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:10,116 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:10,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1624242062, now seen corresponding path program 1 times [2019-10-15 01:09:10,117 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:10,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647561104] [2019-10-15 01:09:10,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:10,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:10,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,220 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 01:09:10,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647561104] [2019-10-15 01:09:10,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478360075] [2019-10-15 01:09:10,221 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 01:09:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:10,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:11,038 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 01:09:11,039 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:11,313 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 01:09:11,313 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:11,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:11,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579083401] [2019-10-15 01:09:11,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:11,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:11,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:11,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:11,315 INFO L87 Difference]: Start difference. First operand 662 states and 1035 transitions. Second operand 8 states. [2019-10-15 01:09:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:11,417 INFO L93 Difference]: Finished difference Result 1170 states and 1860 transitions. [2019-10-15 01:09:11,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:11,418 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2019-10-15 01:09:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:11,422 INFO L225 Difference]: With dead ends: 1170 [2019-10-15 01:09:11,423 INFO L226 Difference]: Without dead ends: 676 [2019-10-15 01:09:11,426 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 257 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2019-10-15 01:09:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 669. [2019-10-15 01:09:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2019-10-15 01:09:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1046 transitions. [2019-10-15 01:09:11,450 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1046 transitions. Word has length 133 [2019-10-15 01:09:11,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:11,451 INFO L462 AbstractCegarLoop]: Abstraction has 669 states and 1046 transitions. [2019-10-15 01:09:11,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1046 transitions. [2019-10-15 01:09:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:11,454 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:11,454 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:11,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:11,660 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:11,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:11,660 INFO L82 PathProgramCache]: Analyzing trace with hash 686087154, now seen corresponding path program 1 times [2019-10-15 01:09:11,660 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:11,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941321564] [2019-10-15 01:09:11,661 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,661 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,753 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 01:09:11,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941321564] [2019-10-15 01:09:11,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795198296] [2019-10-15 01:09:11,753 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 01:09:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:12,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:12,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:12,704 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:13,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:13,175 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:13,175 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:13,175 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790957014] [2019-10-15 01:09:13,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:13,176 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:13,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:13,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:13,177 INFO L87 Difference]: Start difference. First operand 669 states and 1046 transitions. Second operand 14 states. [2019-10-15 01:09:13,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:13,513 INFO L93 Difference]: Finished difference Result 1171 states and 1860 transitions. [2019-10-15 01:09:13,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:09:13,514 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2019-10-15 01:09:13,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:13,519 INFO L225 Difference]: With dead ends: 1171 [2019-10-15 01:09:13,519 INFO L226 Difference]: Without dead ends: 677 [2019-10-15 01:09:13,522 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 252 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 01:09:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2019-10-15 01:09:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 669. [2019-10-15 01:09:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2019-10-15 01:09:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1046 transitions. [2019-10-15 01:09:13,613 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1046 transitions. Word has length 133 [2019-10-15 01:09:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:13,616 INFO L462 AbstractCegarLoop]: Abstraction has 669 states and 1046 transitions. [2019-10-15 01:09:13,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:09:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1046 transitions. [2019-10-15 01:09:13,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-15 01:09:13,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:13,619 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:13,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:13,828 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:13,828 INFO L82 PathProgramCache]: Analyzing trace with hash 778842593, now seen corresponding path program 1 times [2019-10-15 01:09:13,829 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:13,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491669500] [2019-10-15 01:09:13,829 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,830 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:13,942 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 01:09:13,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491669500] [2019-10-15 01:09:13,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786837008] [2019-10-15 01:09:13,943 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 01:09:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:14,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:14,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:14,968 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:15,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:15,406 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:15,406 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-15 01:09:15,406 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450650070] [2019-10-15 01:09:15,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:15,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:15,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:15,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:15,409 INFO L87 Difference]: Start difference. First operand 669 states and 1046 transitions. Second operand 11 states. [2019-10-15 01:09:15,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:15,594 INFO L93 Difference]: Finished difference Result 1172 states and 1868 transitions. [2019-10-15 01:09:15,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:15,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 134 [2019-10-15 01:09:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:15,599 INFO L225 Difference]: With dead ends: 1172 [2019-10-15 01:09:15,600 INFO L226 Difference]: Without dead ends: 678 [2019-10-15 01:09:15,602 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 255 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 01:09:15,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2019-10-15 01:09:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 671. [2019-10-15 01:09:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2019-10-15 01:09:15,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1052 transitions. [2019-10-15 01:09:15,644 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1052 transitions. Word has length 134 [2019-10-15 01:09:15,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:15,645 INFO L462 AbstractCegarLoop]: Abstraction has 671 states and 1052 transitions. [2019-10-15 01:09:15,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:15,645 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1052 transitions. [2019-10-15 01:09:15,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-15 01:09:15,647 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:15,648 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:15,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:15,856 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:15,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:15,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2032492013, now seen corresponding path program 1 times [2019-10-15 01:09:15,857 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:15,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258180538] [2019-10-15 01:09:15,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:15,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:15,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:15,966 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 01:09:15,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258180538] [2019-10-15 01:09:15,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297925732] [2019-10-15 01:09:15,967 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 01:09:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:16,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:16,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:16,868 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:17,087 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:17,156 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:17,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-15 01:09:17,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078964964] [2019-10-15 01:09:17,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:17,157 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:17,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:17,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:17,158 INFO L87 Difference]: Start difference. First operand 671 states and 1052 transitions. Second operand 9 states. [2019-10-15 01:09:17,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:17,294 INFO L93 Difference]: Finished difference Result 1268 states and 2033 transitions. [2019-10-15 01:09:17,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:17,295 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2019-10-15 01:09:17,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:17,299 INFO L225 Difference]: With dead ends: 1268 [2019-10-15 01:09:17,300 INFO L226 Difference]: Without dead ends: 680 [2019-10-15 01:09:17,302 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 264 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 01:09:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2019-10-15 01:09:17,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 678. [2019-10-15 01:09:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2019-10-15 01:09:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1060 transitions. [2019-10-15 01:09:17,326 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1060 transitions. Word has length 135 [2019-10-15 01:09:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:17,327 INFO L462 AbstractCegarLoop]: Abstraction has 678 states and 1060 transitions. [2019-10-15 01:09:17,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1060 transitions. [2019-10-15 01:09:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 01:09:17,330 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:17,330 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, 1, 1] [2019-10-15 01:09:17,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:17,545 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1529526242, now seen corresponding path program 1 times [2019-10-15 01:09:17,545 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:17,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324591977] [2019-10-15 01:09:17,546 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,546 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:17,658 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 01:09:17,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324591977] [2019-10-15 01:09:17,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115734111] [2019-10-15 01:09:17,660 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