/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:30:47,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:30:47,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:30:47,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:30:47,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:30:47,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:30:47,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:30:47,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:30:47,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:30:47,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:30:47,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:30:47,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:30:47,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:30:47,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:30:47,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:30:47,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:30:47,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:30:47,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:30:47,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:30:47,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:30:47,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:30:47,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:30:47,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:30:47,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:30:47,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 21:30:47,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 21:30:47,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 21:30:47,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 21:30:47,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 21:30:47,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 21:30:47,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 21:30:47,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 21:30:47,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 21:30:47,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 21:30:47,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 21:30:47,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 21:30:47,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 21:30:47,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 21:30:47,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:30:47,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:30:47,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:30:47,908 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 21:30:47,941 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:30:47,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:30:47,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:30:47,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:30:47,943 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:30:47,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:30:47,946 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:30:47,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:30:47,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:30:47,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:30:47,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:30:47,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:30:47,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:30:47,947 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:30:47,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:30:47,947 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:30:47,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:30:47,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:30:47,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:30:47,948 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:30:47,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:30:47,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:30:47,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:30:47,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:30:47,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:30:47,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:30:47,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:30:47,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:30:47,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:30:48,220 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:30:48,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:30:48,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:30:48,245 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:30:48,245 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:30:48,246 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product22.cil.c [2019-11-06 21:30:48,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94f02cb16/2400eb6d776045bb927cb55a90642501/FLAG4de4c2886 [2019-11-06 21:30:48,930 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:30:48,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product22.cil.c [2019-11-06 21:30:48,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94f02cb16/2400eb6d776045bb927cb55a90642501/FLAG4de4c2886 [2019-11-06 21:30:49,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94f02cb16/2400eb6d776045bb927cb55a90642501 [2019-11-06 21:30:49,160 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:30:49,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:30:49,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:30:49,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:30:49,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:30:49,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:30:49" (1/1) ... [2019-11-06 21:30:49,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c25fe17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:30:49, skipping insertion in model container [2019-11-06 21:30:49,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:30:49" (1/1) ... [2019-11-06 21:30:49,178 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:30:49,266 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:30:49,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:30:49,990 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:30:50,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:30:50,228 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:30:50,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:30:50 WrapperNode [2019-11-06 21:30:50,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:30:50,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:30:50,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:30:50,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:30:50,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:30:50" (1/1) ... [2019-11-06 21:30:50,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:30:50" (1/1) ... [2019-11-06 21:30:50,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:30:50" (1/1) ... [2019-11-06 21:30:50,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:30:50" (1/1) ... [2019-11-06 21:30:50,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:30:50" (1/1) ... [2019-11-06 21:30:50,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:30:50" (1/1) ... [2019-11-06 21:30:50,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:30:50" (1/1) ... [2019-11-06 21:30:50,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:30:50,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:30:50,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:30:50,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:30:50,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:30:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:30:50,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:30:50,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:30:50,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-06 21:30:50,524 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-06 21:30:50,524 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-06 21:30:50,524 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-06 21:30:50,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-06 21:30:50,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-06 21:30:50,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-06 21:30:50,525 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-06 21:30:50,526 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-06 21:30:50,526 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-06 21:30:50,526 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-06 21:30:50,526 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-06 21:30:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-06 21:30:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-06 21:30:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-06 21:30:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-06 21:30:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-06 21:30:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-06 21:30:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-06 21:30:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-06 21:30:50,529 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-06 21:30:50,529 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-06 21:30:50,529 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-06 21:30:50,529 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-06 21:30:50,529 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-06 21:30:50,530 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-06 21:30:50,530 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-06 21:30:50,530 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-06 21:30:50,530 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-06 21:30:50,530 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-06 21:30:50,531 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-06 21:30:50,531 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-06 21:30:50,531 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-06 21:30:50,531 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-06 21:30:50,531 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:30:50,532 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-06 21:30:50,532 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-06 21:30:50,532 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-06 21:30:50,532 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-06 21:30:50,532 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-06 21:30:50,533 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-06 21:30:50,533 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-06 21:30:50,533 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-06 21:30:50,533 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-06 21:30:50,533 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-06 21:30:50,534 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-06 21:30:50,534 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-06 21:30:50,534 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-06 21:30:50,534 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-06 21:30:50,534 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-06 21:30:50,535 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-06 21:30:50,535 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-06 21:30:50,535 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-06 21:30:50,535 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-06 21:30:50,535 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-06 21:30:50,536 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-06 21:30:50,536 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-06 21:30:50,536 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-06 21:30:50,536 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-06 21:30:50,536 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-06 21:30:50,537 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-06 21:30:50,537 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-06 21:30:50,537 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-06 21:30:50,537 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-06 21:30:50,537 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-06 21:30:50,538 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-06 21:30:50,538 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-06 21:30:50,538 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-11-06 21:30:50,538 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-06 21:30:50,538 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-11-06 21:30:50,539 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-06 21:30:50,539 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-06 21:30:50,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-11-06 21:30:50,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-11-06 21:30:50,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-11-06 21:30:50,540 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-11-06 21:30:50,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:30:50,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:30:50,540 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-06 21:30:50,541 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 21:30:50,541 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-06 21:30:50,541 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-06 21:30:50,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 21:30:50,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-06 21:30:50,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 21:30:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-06 21:30:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-06 21:30:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:30:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-06 21:30:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-06 21:30:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 21:30:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-06 21:30:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-06 21:30:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 21:30:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-06 21:30:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-06 21:30:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-06 21:30:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-06 21:30:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-06 21:30:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-06 21:30:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-06 21:30:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-06 21:30:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-06 21:30:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-11-06 21:30:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-06 21:30:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-06 21:30:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-06 21:30:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-06 21:30:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-06 21:30:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-06 21:30:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-06 21:30:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-06 21:30:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-06 21:30:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 21:30:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-06 21:30:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-06 21:30:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-06 21:30:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-06 21:30:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-06 21:30:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-06 21:30:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-06 21:30:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-06 21:30:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-06 21:30:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-06 21:30:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-06 21:30:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-06 21:30:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-06 21:30:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-06 21:30:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-06 21:30:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-06 21:30:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-11-06 21:30:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-11-06 21:30:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-06 21:30:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-06 21:30:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-06 21:30:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-06 21:30:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-06 21:30:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:30:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-06 21:30:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-06 21:30:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-06 21:30:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-06 21:30:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-06 21:30:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-06 21:30:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-06 21:30:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-06 21:30:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-06 21:30:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-06 21:30:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-06 21:30:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-06 21:30:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-06 21:30:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-06 21:30:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-06 21:30:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-06 21:30:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-06 21:30:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-06 21:30:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-06 21:30:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-06 21:30:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-06 21:30:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-06 21:30:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-06 21:30:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-06 21:30:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-11-06 21:30:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-11-06 21:30:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-11-06 21:30:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-06 21:30:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:30:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-06 21:30:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:30:52,968 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:30:52,968 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-06 21:30:52,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:30:52 BoogieIcfgContainer [2019-11-06 21:30:52,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:30:52,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:30:52,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:30:52,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:30:52,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:30:49" (1/3) ... [2019-11-06 21:30:52,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f187a60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:30:52, skipping insertion in model container [2019-11-06 21:30:52,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:30:50" (2/3) ... [2019-11-06 21:30:52,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f187a60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:30:52, skipping insertion in model container [2019-11-06 21:30:52,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:30:52" (3/3) ... [2019-11-06 21:30:52,980 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product22.cil.c [2019-11-06 21:30:52,990 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:30:53,000 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:30:53,012 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:30:53,056 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:30:53,056 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:30:53,057 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:30:53,057 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:30:53,057 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:30:53,057 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:30:53,057 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:30:53,057 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:30:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states. [2019-11-06 21:30:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-06 21:30:53,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:30:53,140 INFO L410 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] [2019-11-06 21:30:53,143 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:30:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:30:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1159872126, now seen corresponding path program 1 times [2019-11-06 21:30:53,162 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:30:53,162 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431750145] [2019-11-06 21:30:53,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:30:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:54,950 WARN L191 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 397 [2019-11-06 21:30:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,316 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-11-06 21:30:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,532 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-11-06 21:30:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 21:30:55,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431750145] [2019-11-06 21:30:55,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812032227] [2019-11-06 21:30:55,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:30:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:56,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-06 21:30:56,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:30:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-06 21:30:56,564 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:30:56,564 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 9 [2019-11-06 21:30:56,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422053518] [2019-11-06 21:30:56,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 21:30:56,572 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:30:56,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 21:30:56,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:30:56,589 INFO L87 Difference]: Start difference. First operand 790 states. Second operand 2 states. [2019-11-06 21:30:56,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:30:56,671 INFO L93 Difference]: Finished difference Result 666 states and 1058 transitions. [2019-11-06 21:30:56,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 21:30:56,673 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-11-06 21:30:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:30:56,702 INFO L225 Difference]: With dead ends: 666 [2019-11-06 21:30:56,702 INFO L226 Difference]: Without dead ends: 629 [2019-11-06 21:30:56,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:30:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-06 21:30:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-11-06 21:30:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-11-06 21:30:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1003 transitions. [2019-11-06 21:30:56,839 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1003 transitions. Word has length 116 [2019-11-06 21:30:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:30:56,841 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1003 transitions. [2019-11-06 21:30:56,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 21:30:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1003 transitions. [2019-11-06 21:30:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-06 21:30:56,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:30:56,846 INFO L410 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] [2019-11-06 21:30:57,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:30:57,051 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:30:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:30:57,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1060701681, now seen corresponding path program 1 times [2019-11-06 21:30:57,052 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:30:57,052 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55542363] [2019-11-06 21:30:57,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:30:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,145 WARN L191 SmtUtils]: Spent 918.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2019-11-06 21:30:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,434 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-11-06 21:30:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,615 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-11-06 21:30:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 21:30:58,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55542363] [2019-11-06 21:30:58,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106176931] [2019-11-06 21:30:58,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:30:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:30:59,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 21:30:59,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:30:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:30:59,601 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:30:59,601 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-11-06 21:30:59,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631913175] [2019-11-06 21:30:59,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:30:59,603 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:30:59,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:30:59,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:30:59,603 INFO L87 Difference]: Start difference. First operand 629 states and 1003 transitions. Second operand 4 states. [2019-11-06 21:30:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:30:59,709 INFO L93 Difference]: Finished difference Result 1230 states and 1979 transitions. [2019-11-06 21:30:59,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:30:59,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-11-06 21:30:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:30:59,717 INFO L225 Difference]: With dead ends: 1230 [2019-11-06 21:30:59,717 INFO L226 Difference]: Without dead ends: 629 [2019-11-06 21:30:59,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:30:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-06 21:30:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-11-06 21:30:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-11-06 21:30:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1002 transitions. [2019-11-06 21:30:59,756 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1002 transitions. Word has length 118 [2019-11-06 21:30:59,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:30:59,757 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1002 transitions. [2019-11-06 21:30:59,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:30:59,757 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1002 transitions. [2019-11-06 21:30:59,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 21:30:59,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:30:59,759 INFO L410 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] [2019-11-06 21:30:59,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:30:59,967 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:30:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:30:59,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1607555785, now seen corresponding path program 1 times [2019-11-06 21:30:59,969 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:30:59,969 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231150586] [2019-11-06 21:30:59,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:31:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:00,941 WARN L191 SmtUtils]: Spent 859.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2019-11-06 21:31:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,197 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-11-06 21:31:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,343 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-11-06 21:31:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 21:31:01,708 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231150586] [2019-11-06 21:31:01,709 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977847585] [2019-11-06 21:31:01,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:02,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 21:31:02,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:31:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:31:02,298 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:31:02,298 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-11-06 21:31:02,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141130274] [2019-11-06 21:31:02,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:31:02,299 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:31:02,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:31:02,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:31:02,300 INFO L87 Difference]: Start difference. First operand 629 states and 1002 transitions. Second operand 4 states. [2019-11-06 21:31:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:31:02,381 INFO L93 Difference]: Finished difference Result 1230 states and 1977 transitions. [2019-11-06 21:31:02,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:31:02,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-11-06 21:31:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:31:02,387 INFO L225 Difference]: With dead ends: 1230 [2019-11-06 21:31:02,387 INFO L226 Difference]: Without dead ends: 629 [2019-11-06 21:31:02,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:31:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-06 21:31:02,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-11-06 21:31:02,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-11-06 21:31:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1001 transitions. [2019-11-06 21:31:02,418 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1001 transitions. Word has length 120 [2019-11-06 21:31:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:31:02,419 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1001 transitions. [2019-11-06 21:31:02,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:31:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1001 transitions. [2019-11-06 21:31:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 21:31:02,421 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:31:02,421 INFO L410 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] [2019-11-06 21:31:02,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:02,629 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:31:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:31:02,630 INFO L82 PathProgramCache]: Analyzing trace with hash -104433287, now seen corresponding path program 1 times [2019-11-06 21:31:02,630 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:31:02,630 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222083068] [2019-11-06 21:31:02,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:31:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:03,587 WARN L191 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2019-11-06 21:31:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:03,852 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-11-06 21:31:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,000 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-11-06 21:31:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 21:31:04,265 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222083068] [2019-11-06 21:31:04,265 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557999717] [2019-11-06 21:31:04,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:04,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 21:31:04,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:31:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:31:04,939 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:31:04,939 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-11-06 21:31:04,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261019199] [2019-11-06 21:31:04,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:31:04,942 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:31:04,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:31:04,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:31:04,943 INFO L87 Difference]: Start difference. First operand 629 states and 1001 transitions. Second operand 4 states. [2019-11-06 21:31:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:31:05,043 INFO L93 Difference]: Finished difference Result 1237 states and 1984 transitions. [2019-11-06 21:31:05,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:31:05,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-11-06 21:31:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:31:05,049 INFO L225 Difference]: With dead ends: 1237 [2019-11-06 21:31:05,049 INFO L226 Difference]: Without dead ends: 638 [2019-11-06 21:31:05,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:31:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-11-06 21:31:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-11-06 21:31:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-11-06 21:31:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1013 transitions. [2019-11-06 21:31:05,083 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1013 transitions. Word has length 122 [2019-11-06 21:31:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:31:05,084 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 1013 transitions. [2019-11-06 21:31:05,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:31:05,084 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1013 transitions. [2019-11-06 21:31:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 21:31:05,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:31:05,089 INFO L410 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] [2019-11-06 21:31:05,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:05,300 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:31:05,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:31:05,301 INFO L82 PathProgramCache]: Analyzing trace with hash -730714916, now seen corresponding path program 1 times [2019-11-06 21:31:05,301 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:31:05,302 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491842326] [2019-11-06 21:31:05,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:31:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,214 WARN L191 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2019-11-06 21:31:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,523 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-11-06 21:31:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,678 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-11-06 21:31:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 21:31:06,892 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491842326] [2019-11-06 21:31:06,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452441669] [2019-11-06 21:31:06,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:07,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 21:31:07,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:31:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:31:07,505 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:31:07,505 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-11-06 21:31:07,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111161436] [2019-11-06 21:31:07,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:31:07,507 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:31:07,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:31:07,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:31:07,508 INFO L87 Difference]: Start difference. First operand 638 states and 1013 transitions. Second operand 4 states. [2019-11-06 21:31:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:31:07,617 INFO L93 Difference]: Finished difference Result 1239 states and 1985 transitions. [2019-11-06 21:31:07,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:31:07,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-11-06 21:31:07,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:31:07,639 INFO L225 Difference]: With dead ends: 1239 [2019-11-06 21:31:07,640 INFO L226 Difference]: Without dead ends: 638 [2019-11-06 21:31:07,648 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:31:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-11-06 21:31:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-11-06 21:31:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-11-06 21:31:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1012 transitions. [2019-11-06 21:31:07,699 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1012 transitions. Word has length 123 [2019-11-06 21:31:07,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:31:07,700 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 1012 transitions. [2019-11-06 21:31:07,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:31:07,700 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1012 transitions. [2019-11-06 21:31:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 21:31:07,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:31:07,704 INFO L410 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] [2019-11-06 21:31:07,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:07,920 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:31:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:31:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash -212076067, now seen corresponding path program 1 times [2019-11-06 21:31:07,921 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:31:07,921 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890724338] [2019-11-06 21:31:07,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:31:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,067 WARN L191 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 397 [2019-11-06 21:31:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,331 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-11-06 21:31:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,473 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-11-06 21:31:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 21:31:09,696 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890724338] [2019-11-06 21:31:09,696 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645770013] [2019-11-06 21:31:09,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:10,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 21:31:10,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:31:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:31:10,351 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:31:10,352 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-11-06 21:31:10,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643032302] [2019-11-06 21:31:10,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:31:10,353 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:31:10,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:31:10,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:31:10,353 INFO L87 Difference]: Start difference. First operand 638 states and 1012 transitions. Second operand 4 states. [2019-11-06 21:31:10,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:31:10,431 INFO L93 Difference]: Finished difference Result 1239 states and 1984 transitions. [2019-11-06 21:31:10,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:31:10,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-11-06 21:31:10,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:31:10,436 INFO L225 Difference]: With dead ends: 1239 [2019-11-06 21:31:10,436 INFO L226 Difference]: Without dead ends: 638 [2019-11-06 21:31:10,439 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:31:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-11-06 21:31:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-11-06 21:31:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-11-06 21:31:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1011 transitions. [2019-11-06 21:31:10,461 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1011 transitions. Word has length 124 [2019-11-06 21:31:10,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:31:10,461 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 1011 transitions. [2019-11-06 21:31:10,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:31:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1011 transitions. [2019-11-06 21:31:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 21:31:10,463 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:31:10,464 INFO L410 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] [2019-11-06 21:31:10,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:10,671 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:31:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:31:10,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1439359232, now seen corresponding path program 1 times [2019-11-06 21:31:10,672 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:31:10,673 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719243640] [2019-11-06 21:31:10,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:31:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:11,627 WARN L191 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2019-11-06 21:31:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:11,933 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-11-06 21:31:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,111 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-11-06 21:31:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 21:31:12,555 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719243640] [2019-11-06 21:31:12,556 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577595672] [2019-11-06 21:31:12,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:13,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 21:31:13,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:31:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:31:13,421 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:31:13,421 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 20 [2019-11-06 21:31:13,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72067887] [2019-11-06 21:31:13,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:31:13,424 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:31:13,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:31:13,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2019-11-06 21:31:13,424 INFO L87 Difference]: Start difference. First operand 638 states and 1011 transitions. Second operand 7 states. [2019-11-06 21:31:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:31:13,585 INFO L93 Difference]: Finished difference Result 1246 states and 1993 transitions. [2019-11-06 21:31:13,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:31:13,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2019-11-06 21:31:13,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:31:13,591 INFO L225 Difference]: With dead ends: 1246 [2019-11-06 21:31:13,592 INFO L226 Difference]: Without dead ends: 649 [2019-11-06 21:31:13,597 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2019-11-06 21:31:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2019-11-06 21:31:13,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 645. [2019-11-06 21:31:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-06 21:31:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1021 transitions. [2019-11-06 21:31:13,630 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1021 transitions. Word has length 125 [2019-11-06 21:31:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:31:13,632 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1021 transitions. [2019-11-06 21:31:13,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:31:13,632 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1021 transitions. [2019-11-06 21:31:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 21:31:13,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:31:13,635 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:31:13,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:13,843 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:31:13,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:31:13,843 INFO L82 PathProgramCache]: Analyzing trace with hash 438750369, now seen corresponding path program 1 times [2019-11-06 21:31:13,843 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:31:13,844 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668897949] [2019-11-06 21:31:13,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:31:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:14,758 WARN L191 SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2019-11-06 21:31:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,059 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-11-06 21:31:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,206 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-11-06 21:31:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 21:31:15,756 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668897949] [2019-11-06 21:31:15,757 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376997071] [2019-11-06 21:31:15,757 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 [2019-11-06 21:31:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:16,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 21:31:16,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:31:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:31:16,450 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:31:16,450 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 22 [2019-11-06 21:31:16,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156345905] [2019-11-06 21:31:16,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:31:16,451 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:31:16,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:31:16,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2019-11-06 21:31:16,452 INFO L87 Difference]: Start difference. First operand 645 states and 1021 transitions. Second operand 7 states. [2019-11-06 21:31:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:31:16,583 INFO L93 Difference]: Finished difference Result 1252 states and 2002 transitions. [2019-11-06 21:31:16,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:31:16,584 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2019-11-06 21:31:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:31:16,590 INFO L225 Difference]: With dead ends: 1252 [2019-11-06 21:31:16,590 INFO L226 Difference]: Without dead ends: 652 [2019-11-06 21:31:16,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2019-11-06 21:31:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2019-11-06 21:31:16,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 648. [2019-11-06 21:31:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2019-11-06 21:31:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1026 transitions. [2019-11-06 21:31:16,626 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1026 transitions. Word has length 126 [2019-11-06 21:31:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:31:16,627 INFO L462 AbstractCegarLoop]: Abstraction has 648 states and 1026 transitions. [2019-11-06 21:31:16,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:31:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1026 transitions. [2019-11-06 21:31:16,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 21:31:16,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:31:16,629 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:31:16,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:16,831 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:31:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:31:16,833 INFO L82 PathProgramCache]: Analyzing trace with hash -499781246, now seen corresponding path program 1 times [2019-11-06 21:31:16,833 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:31:16,833 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312491926] [2019-11-06 21:31:16,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:31:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:17,891 WARN L191 SmtUtils]: Spent 965.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2019-11-06 21:31:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,147 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-11-06 21:31:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,307 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-11-06 21:31:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 21:31:18,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312491926] [2019-11-06 21:31:18,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453429505] [2019-11-06 21:31:18,552 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 [2019-11-06 21:31:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:19,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 21:31:19,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:31:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:31:19,373 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:31:19,373 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2019-11-06 21:31:19,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916178485] [2019-11-06 21:31:19,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:31:19,374 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:31:19,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:31:19,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:31:19,375 INFO L87 Difference]: Start difference. First operand 648 states and 1026 transitions. Second operand 4 states. [2019-11-06 21:31:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:31:19,557 INFO L93 Difference]: Finished difference Result 1257 states and 2012 transitions. [2019-11-06 21:31:19,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:31:19,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-11-06 21:31:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:31:19,563 INFO L225 Difference]: With dead ends: 1257 [2019-11-06 21:31:19,563 INFO L226 Difference]: Without dead ends: 648 [2019-11-06 21:31:19,566 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:31:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2019-11-06 21:31:19,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2019-11-06 21:31:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2019-11-06 21:31:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1021 transitions. [2019-11-06 21:31:19,591 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1021 transitions. Word has length 126 [2019-11-06 21:31:19,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:31:19,592 INFO L462 AbstractCegarLoop]: Abstraction has 648 states and 1021 transitions. [2019-11-06 21:31:19,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:31:19,592 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1021 transitions. [2019-11-06 21:31:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 21:31:19,594 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:31:19,595 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:31:19,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:19,802 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:31:19,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:31:19,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1419215856, now seen corresponding path program 1 times [2019-11-06 21:31:19,802 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:31:19,802 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312877698] [2019-11-06 21:31:19,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:31:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:20,726 WARN L191 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2019-11-06 21:31:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:20,968 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-11-06 21:31:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,123 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-11-06 21:31:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 21:31:21,449 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312877698] [2019-11-06 21:31:21,449 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320921614] [2019-11-06 21:31:21,449 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 [2019-11-06 21:31:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:22,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 21:31:22,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:31:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:31:22,200 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:31:22,200 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 22 [2019-11-06 21:31:22,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119691796] [2019-11-06 21:31:22,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:31:22,201 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:31:22,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:31:22,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2019-11-06 21:31:22,202 INFO L87 Difference]: Start difference. First operand 648 states and 1021 transitions. Second operand 9 states. [2019-11-06 21:31:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:31:22,471 INFO L93 Difference]: Finished difference Result 1261 states and 2006 transitions. [2019-11-06 21:31:22,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:31:22,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2019-11-06 21:31:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:31:22,476 INFO L225 Difference]: With dead ends: 1261 [2019-11-06 21:31:22,476 INFO L226 Difference]: Without dead ends: 658 [2019-11-06 21:31:22,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2019-11-06 21:31:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2019-11-06 21:31:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 652. [2019-11-06 21:31:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2019-11-06 21:31:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1027 transitions. [2019-11-06 21:31:22,505 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1027 transitions. Word has length 129 [2019-11-06 21:31:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:31:22,505 INFO L462 AbstractCegarLoop]: Abstraction has 652 states and 1027 transitions. [2019-11-06 21:31:22,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:31:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1027 transitions. [2019-11-06 21:31:22,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-06 21:31:22,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:31:22,508 INFO L410 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] [2019-11-06 21:31:22,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:31:22,724 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:31:22,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:31:22,724 INFO L82 PathProgramCache]: Analyzing trace with hash -140160693, now seen corresponding path program 1 times [2019-11-06 21:31:22,724 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:31:22,725 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680205833] [2019-11-06 21:31:22,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:31:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:23,684 WARN L191 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2019-11-06 21:31:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:31:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat