java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec13_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:07:31,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:07:31,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:07:31,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:07:31,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:07:31,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:07:31,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:07:31,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:07:31,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:07:31,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:07:31,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:07:31,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:07:31,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:07:31,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:07:31,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:07:31,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:07:31,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:07:31,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:07:31,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:07:31,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:07:31,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:07:31,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:07:31,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:07:31,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:07:31,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:07:31,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:07:31,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:07:31,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:07:31,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:07:31,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:07:31,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:07:31,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:07:31,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:07:31,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:07:31,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:07:31,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:07:31,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:07:31,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:07:31,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:07:31,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:07:31,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:07:31,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:07:31,545 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:07:31,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:07:31,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:07:31,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:07:31,547 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:07:31,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:07:31,548 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:07:31,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:07:31,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:07:31,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:07:31,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:07:31,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:07:31,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:07:31,549 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:07:31,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:07:31,549 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:07:31,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:07:31,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:07:31,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:07:31,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:07:31,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:07:31,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:07:31,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:07:31,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:07:31,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:07:31,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:07:31,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:07:31,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:07:31,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:07:31,852 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:07:31,875 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:07:31,880 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:07:31,881 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:07:31,882 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:07:31,882 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product22.cil.c [2019-10-15 01:07:31,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f6274b11/00f9b5c8c26245bab8a233277c6fd04e/FLAG1fb7ebac1 [2019-10-15 01:07:32,636 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:07:32,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product22.cil.c [2019-10-15 01:07:32,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f6274b11/00f9b5c8c26245bab8a233277c6fd04e/FLAG1fb7ebac1 [2019-10-15 01:07:32,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f6274b11/00f9b5c8c26245bab8a233277c6fd04e [2019-10-15 01:07:32,810 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:07:32,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:07:32,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:07:32,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:07:32,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:07:32,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:07:32" (1/1) ... [2019-10-15 01:07:32,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67af7f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:32, skipping insertion in model container [2019-10-15 01:07:32,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:07:32" (1/1) ... [2019-10-15 01:07:32,828 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:07:32,916 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:07:33,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:07:33,687 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:07:33,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:07:33,925 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:07:33,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:33 WrapperNode [2019-10-15 01:07:33,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:07:33,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:07:33,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:07:33,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:07:33,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:33" (1/1) ... [2019-10-15 01:07:33,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:33" (1/1) ... [2019-10-15 01:07:33,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:33" (1/1) ... [2019-10-15 01:07:33,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:33" (1/1) ... [2019-10-15 01:07:34,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:33" (1/1) ... [2019-10-15 01:07:34,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:33" (1/1) ... [2019-10-15 01:07:34,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:33" (1/1) ... [2019-10-15 01:07:34,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:07:34,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:07:34,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:07:34,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:07:34,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:07:34,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:07:34,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:07:34,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:07:34,224 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:07:34,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:07:34,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:07:34,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:07:34,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:07:34,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:07:34,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:07:34,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:07:34,226 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:07:34,226 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:07:34,226 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:07:34,226 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:07:34,227 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:07:34,227 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:07:34,227 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:07:34,227 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:07:34,227 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:07:34,228 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:07:34,228 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:07:34,228 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:07:34,229 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:07:34,229 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:07:34,229 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:07:34,229 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:07:34,229 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 01:07:34,230 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:07:34,230 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:07:34,230 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:07:34,230 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 01:07:34,230 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:07:34,230 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:07:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:07:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-10-15 01:07:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:07:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-10-15 01:07:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:07:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:07:34,232 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:07:34,232 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:07:34,232 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:07:34,232 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:07:34,232 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:07:34,232 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:07:34,233 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:07:34,233 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:07:34,233 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:07:34,233 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:07:34,233 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:07:34,233 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:07:34,234 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:07:34,234 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:07:34,234 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:07:34,234 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:07:34,234 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:07:34,234 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:07:34,235 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:07:34,235 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:07:34,235 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:07:34,235 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:07:34,235 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:07:34,236 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:07:34,236 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:07:34,236 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:07:34,236 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:07:34,236 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:07:34,237 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:07:34,237 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:07:34,237 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:07:34,237 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:07:34,237 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:07:34,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:07:34,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-15 01:07:34,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-15 01:07:34,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:07:34,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:07:34,238 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:07:34,239 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:07:34,239 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:07:34,239 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:07:34,239 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:07:34,239 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:07:34,239 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:07:34,240 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:07:34,240 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:07:34,240 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:07:34,240 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:07:34,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:07:34,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:07:34,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:07:34,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:07:34,241 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:07:34,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:07:34,241 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:07:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:07:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:07:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:07:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:07:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:07:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:07:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:07:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:07:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:07:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:07:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:07:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:07:34,244 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:07:34,244 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:07:34,244 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:07:34,244 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:07:34,244 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:07:34,244 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:07:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:07:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:07:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:07:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:07:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:07:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:07:34,246 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:07:34,246 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:07:34,246 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:07:34,246 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:07:34,246 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:07:34,247 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:07:34,247 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:07:34,247 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:07:34,247 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:07:34,247 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:07:34,247 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 01:07:34,248 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:07:34,248 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:07:34,248 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 01:07:34,248 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:07:34,248 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:07:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:07:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-10-15 01:07:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-15 01:07:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-15 01:07:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-10-15 01:07:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:07:34,250 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:07:34,250 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:07:34,250 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:07:34,250 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:07:34,250 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:07:34,251 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:07:34,251 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:07:34,251 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:07:34,251 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:07:34,251 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:07:34,251 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:07:34,252 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:07:34,252 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:07:34,252 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:07:34,252 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:07:34,252 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:07:34,252 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:07:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:07:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:07:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:07:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:07:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:07:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:07:34,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:07:34,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:07:36,852 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:07:36,853 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:07:36,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:07:36 BoogieIcfgContainer [2019-10-15 01:07:36,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:07:36,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:07:36,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:07:36,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:07:36,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:07:32" (1/3) ... [2019-10-15 01:07:36,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6d1c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:07:36, skipping insertion in model container [2019-10-15 01:07:36,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:33" (2/3) ... [2019-10-15 01:07:36,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6d1c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:07:36, skipping insertion in model container [2019-10-15 01:07:36,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:07:36" (3/3) ... [2019-10-15 01:07:36,867 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2019-10-15 01:07:36,877 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:07:36,889 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:07:36,901 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:07:36,938 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:07:36,938 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:07:36,938 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:07:36,939 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:07:36,939 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:07:36,939 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:07:36,939 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:07:36,939 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:07:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states. [2019-10-15 01:07:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-15 01:07:36,994 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:36,995 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:36,997 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1312558517, now seen corresponding path program 1 times [2019-10-15 01:07:37,015 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:37,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998956535] [2019-10-15 01:07:37,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:37,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:37,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:37,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998956535] [2019-10-15 01:07:37,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593406091] [2019-10-15 01:07:37,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:38,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:38,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:38,431 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:38,591 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:38,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-15 01:07:38,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100283124] [2019-10-15 01:07:38,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:38,600 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:38,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:38,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:07:38,619 INFO L87 Difference]: Start difference. First operand 807 states. Second operand 4 states. [2019-10-15 01:07:38,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:38,837 INFO L93 Difference]: Finished difference Result 1315 states and 2130 transitions. [2019-10-15 01:07:38,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:38,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2019-10-15 01:07:38,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:38,869 INFO L225 Difference]: With dead ends: 1315 [2019-10-15 01:07:38,869 INFO L226 Difference]: Without dead ends: 663 [2019-10-15 01:07:38,881 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:07:38,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2019-10-15 01:07:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 663. [2019-10-15 01:07:38,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2019-10-15 01:07:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1053 transitions. [2019-10-15 01:07:39,007 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1053 transitions. Word has length 113 [2019-10-15 01:07:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:39,007 INFO L462 AbstractCegarLoop]: Abstraction has 663 states and 1053 transitions. [2019-10-15 01:07:39,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1053 transitions. [2019-10-15 01:07:39,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 01:07:39,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:39,018 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:39,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:39,226 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:39,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1562455753, now seen corresponding path program 1 times [2019-10-15 01:07:39,227 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:39,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100079858] [2019-10-15 01:07:39,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:39,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:39,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:39,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100079858] [2019-10-15 01:07:39,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960435474] [2019-10-15 01:07:39,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:40,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 2880 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:40,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:07:40,190 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:40,548 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:40,549 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-15 01:07:40,549 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508210987] [2019-10-15 01:07:40,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:07:40,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:40,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:07:40,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:07:40,551 INFO L87 Difference]: Start difference. First operand 663 states and 1053 transitions. Second operand 7 states. [2019-10-15 01:07:40,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:40,752 INFO L93 Difference]: Finished difference Result 1309 states and 2093 transitions. [2019-10-15 01:07:40,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:07:40,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2019-10-15 01:07:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:40,773 INFO L225 Difference]: With dead ends: 1309 [2019-10-15 01:07:40,773 INFO L226 Difference]: Without dead ends: 674 [2019-10-15 01:07:40,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:07:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2019-10-15 01:07:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 670. [2019-10-15 01:07:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2019-10-15 01:07:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1065 transitions. [2019-10-15 01:07:40,836 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1065 transitions. Word has length 115 [2019-10-15 01:07:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:40,837 INFO L462 AbstractCegarLoop]: Abstraction has 670 states and 1065 transitions. [2019-10-15 01:07:40,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:07:40,837 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1065 transitions. [2019-10-15 01:07:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:07:40,842 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:40,842 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:41,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:41,056 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash 543611026, now seen corresponding path program 1 times [2019-10-15 01:07:41,058 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:41,058 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768247045] [2019-10-15 01:07:41,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:41,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:41,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:41,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768247045] [2019-10-15 01:07:41,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302708823] [2019-10-15 01:07:41,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:41,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:41,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:41,856 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:41,981 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:41,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:07:41,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234285975] [2019-10-15 01:07:41,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:41,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:41,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:41,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:41,985 INFO L87 Difference]: Start difference. First operand 670 states and 1065 transitions. Second operand 4 states. [2019-10-15 01:07:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:42,089 INFO L93 Difference]: Finished difference Result 1325 states and 2118 transitions. [2019-10-15 01:07:42,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:42,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-10-15 01:07:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:42,097 INFO L225 Difference]: With dead ends: 1325 [2019-10-15 01:07:42,098 INFO L226 Difference]: Without dead ends: 681 [2019-10-15 01:07:42,101 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2019-10-15 01:07:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 679. [2019-10-15 01:07:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-10-15 01:07:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1073 transitions. [2019-10-15 01:07:42,147 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1073 transitions. Word has length 116 [2019-10-15 01:07:42,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:42,148 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1073 transitions. [2019-10-15 01:07:42,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1073 transitions. [2019-10-15 01:07:42,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:07:42,152 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:42,152 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:42,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:42,360 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:42,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:42,360 INFO L82 PathProgramCache]: Analyzing trace with hash 246045182, now seen corresponding path program 1 times [2019-10-15 01:07:42,360 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:42,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056037469] [2019-10-15 01:07:42,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:42,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:42,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:42,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056037469] [2019-10-15 01:07:42,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723719300] [2019-10-15 01:07:42,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:43,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:43,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:07:43,352 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:43,612 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:43,612 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-15 01:07:43,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851846136] [2019-10-15 01:07:43,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:07:43,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:43,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:07:43,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:07:43,616 INFO L87 Difference]: Start difference. First operand 679 states and 1073 transitions. Second operand 7 states. [2019-10-15 01:07:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:43,782 INFO L93 Difference]: Finished difference Result 1326 states and 2109 transitions. [2019-10-15 01:07:43,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:07:43,782 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2019-10-15 01:07:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:43,790 INFO L225 Difference]: With dead ends: 1326 [2019-10-15 01:07:43,790 INFO L226 Difference]: Without dead ends: 688 [2019-10-15 01:07:43,794 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:07:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2019-10-15 01:07:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 679. [2019-10-15 01:07:43,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-10-15 01:07:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1073 transitions. [2019-10-15 01:07:43,833 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1073 transitions. Word has length 116 [2019-10-15 01:07:43,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:43,834 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1073 transitions. [2019-10-15 01:07:43,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:07:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1073 transitions. [2019-10-15 01:07:43,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-15 01:07:43,841 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:43,842 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:44,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:44,058 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:44,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:44,059 INFO L82 PathProgramCache]: Analyzing trace with hash 703956050, now seen corresponding path program 1 times [2019-10-15 01:07:44,059 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:44,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981198993] [2019-10-15 01:07:44,060 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:44,060 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:44,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:44,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981198993] [2019-10-15 01:07:44,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819740279] [2019-10-15 01:07:44,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:44,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 2883 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:44,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:07:44,781 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:44,886 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:44,886 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:07:44,886 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412505125] [2019-10-15 01:07:44,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:44,887 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:44,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:44,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:44,888 INFO L87 Difference]: Start difference. First operand 679 states and 1073 transitions. Second operand 4 states. [2019-10-15 01:07:45,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:45,112 INFO L93 Difference]: Finished difference Result 1359 states and 2179 transitions. [2019-10-15 01:07:45,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:45,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2019-10-15 01:07:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:45,118 INFO L225 Difference]: With dead ends: 1359 [2019-10-15 01:07:45,119 INFO L226 Difference]: Without dead ends: 721 [2019-10-15 01:07:45,123 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-15 01:07:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 718. [2019-10-15 01:07:45,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2019-10-15 01:07:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1146 transitions. [2019-10-15 01:07:45,151 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1146 transitions. Word has length 119 [2019-10-15 01:07:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:45,151 INFO L462 AbstractCegarLoop]: Abstraction has 718 states and 1146 transitions. [2019-10-15 01:07:45,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1146 transitions. [2019-10-15 01:07:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 01:07:45,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:45,154 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:45,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:45,370 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:45,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:45,371 INFO L82 PathProgramCache]: Analyzing trace with hash 504600262, now seen corresponding path program 1 times [2019-10-15 01:07:45,371 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:45,372 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208669240] [2019-10-15 01:07:45,372 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:45,372 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:45,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:45,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208669240] [2019-10-15 01:07:45,487 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300467559] [2019-10-15 01:07:45,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:46,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 2885 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:46,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:07:46,153 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:46,258 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:46,258 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-15 01:07:46,259 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616460576] [2019-10-15 01:07:46,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:07:46,260 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:46,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:07:46,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:46,260 INFO L87 Difference]: Start difference. First operand 718 states and 1146 transitions. Second operand 5 states. [2019-10-15 01:07:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:46,348 INFO L93 Difference]: Finished difference Result 1383 states and 2225 transitions. [2019-10-15 01:07:46,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:46,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2019-10-15 01:07:46,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:46,355 INFO L225 Difference]: With dead ends: 1383 [2019-10-15 01:07:46,355 INFO L226 Difference]: Without dead ends: 718 [2019-10-15 01:07:46,359 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:46,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2019-10-15 01:07:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 718. [2019-10-15 01:07:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2019-10-15 01:07:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1141 transitions. [2019-10-15 01:07:46,391 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1141 transitions. Word has length 121 [2019-10-15 01:07:46,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:46,392 INFO L462 AbstractCegarLoop]: Abstraction has 718 states and 1141 transitions. [2019-10-15 01:07:46,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:07:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1141 transitions. [2019-10-15 01:07:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 01:07:46,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:46,396 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:46,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:46,608 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:46,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2127688715, now seen corresponding path program 1 times [2019-10-15 01:07:46,608 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:46,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535538005] [2019-10-15 01:07:46,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:46,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:46,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:46,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535538005] [2019-10-15 01:07:46,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487961766] [2019-10-15 01:07:46,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:47,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 2886 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:47,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:07:47,260 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:07:47,491 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:47,491 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:07:47,491 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19145125] [2019-10-15 01:07:47,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:07:47,492 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:47,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:07:47,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:07:47,493 INFO L87 Difference]: Start difference. First operand 718 states and 1141 transitions. Second operand 11 states. [2019-10-15 01:07:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:47,691 INFO L93 Difference]: Finished difference Result 1357 states and 2166 transitions. [2019-10-15 01:07:47,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:07:47,692 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 122 [2019-10-15 01:07:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:47,698 INFO L225 Difference]: With dead ends: 1357 [2019-10-15 01:07:47,698 INFO L226 Difference]: Without dead ends: 738 [2019-10-15 01:07:47,703 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:07:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2019-10-15 01:07:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 725. [2019-10-15 01:07:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-10-15 01:07:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1152 transitions. [2019-10-15 01:07:47,738 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1152 transitions. Word has length 122 [2019-10-15 01:07:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:47,739 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1152 transitions. [2019-10-15 01:07:47,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:07:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1152 transitions. [2019-10-15 01:07:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:07:47,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:47,743 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:47,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:47,952 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:47,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:47,952 INFO L82 PathProgramCache]: Analyzing trace with hash 454016772, now seen corresponding path program 1 times [2019-10-15 01:07:47,953 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:47,953 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470139464] [2019-10-15 01:07:47,953 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:47,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:47,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:48,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470139464] [2019-10-15 01:07:48,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352693198] [2019-10-15 01:07:48,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:48,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:48,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:07:48,788 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:07:48,978 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:48,978 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:07:48,979 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124266139] [2019-10-15 01:07:48,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:07:48,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:48,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:07:48,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:07:48,983 INFO L87 Difference]: Start difference. First operand 725 states and 1152 transitions. Second operand 8 states. [2019-10-15 01:07:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:49,122 INFO L93 Difference]: Finished difference Result 1355 states and 2162 transitions. [2019-10-15 01:07:49,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:07:49,123 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2019-10-15 01:07:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:49,129 INFO L225 Difference]: With dead ends: 1355 [2019-10-15 01:07:49,130 INFO L226 Difference]: Without dead ends: 736 [2019-10-15 01:07:49,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 237 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:07:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2019-10-15 01:07:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 729. [2019-10-15 01:07:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2019-10-15 01:07:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1157 transitions. [2019-10-15 01:07:49,163 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1157 transitions. Word has length 123 [2019-10-15 01:07:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:49,164 INFO L462 AbstractCegarLoop]: Abstraction has 729 states and 1157 transitions. [2019-10-15 01:07:49,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:07:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1157 transitions. [2019-10-15 01:07:49,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 01:07:49,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:49,167 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:49,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:49,377 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:49,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1900302799, now seen corresponding path program 1 times [2019-10-15 01:07:49,378 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:49,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103879138] [2019-10-15 01:07:49,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:49,379 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:49,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:49,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103879138] [2019-10-15 01:07:49,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350400592] [2019-10-15 01:07:49,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:50,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 2888 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:50,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:50,135 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:50,242 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:50,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-15 01:07:50,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936328837] [2019-10-15 01:07:50,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:07:50,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:50,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:07:50,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:50,244 INFO L87 Difference]: Start difference. First operand 729 states and 1157 transitions. Second operand 5 states. [2019-10-15 01:07:50,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:50,424 INFO L93 Difference]: Finished difference Result 1393 states and 2239 transitions. [2019-10-15 01:07:50,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:50,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-10-15 01:07:50,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:50,431 INFO L225 Difference]: With dead ends: 1393 [2019-10-15 01:07:50,431 INFO L226 Difference]: Without dead ends: 774 [2019-10-15 01:07:50,435 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2019-10-15 01:07:50,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 771. [2019-10-15 01:07:50,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2019-10-15 01:07:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1233 transitions. [2019-10-15 01:07:50,464 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1233 transitions. Word has length 124 [2019-10-15 01:07:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:50,465 INFO L462 AbstractCegarLoop]: Abstraction has 771 states and 1233 transitions. [2019-10-15 01:07:50,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:07:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1233 transitions. [2019-10-15 01:07:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:07:50,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:50,468 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:07:50,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:50,676 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:50,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1521963814, now seen corresponding path program 1 times [2019-10-15 01:07:50,677 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:50,677 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356930074] [2019-10-15 01:07:50,677 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:50,678 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:50,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:50,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356930074] [2019-10-15 01:07:50,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192016757] [2019-10-15 01:07:50,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:51,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:51,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:07:51,378 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:51,505 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:51,505 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-10-15 01:07:51,505 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660710453] [2019-10-15 01:07:51,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:07:51,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:07:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:51,509 INFO L87 Difference]: Start difference. First operand 771 states and 1233 transitions. Second operand 6 states. [2019-10-15 01:07:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:51,634 INFO L93 Difference]: Finished difference Result 1447 states and 2324 transitions. [2019-10-15 01:07:51,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:51,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-15 01:07:51,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:51,643 INFO L225 Difference]: With dead ends: 1447 [2019-10-15 01:07:51,644 INFO L226 Difference]: Without dead ends: 767 [2019-10-15 01:07:51,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:07:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2019-10-15 01:07:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 764. [2019-10-15 01:07:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2019-10-15 01:07:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1220 transitions. [2019-10-15 01:07:51,695 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1220 transitions. Word has length 125 [2019-10-15 01:07:51,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:51,696 INFO L462 AbstractCegarLoop]: Abstraction has 764 states and 1220 transitions. [2019-10-15 01:07:51,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:07:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1220 transitions. [2019-10-15 01:07:51,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-15 01:07:51,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:51,702 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:07:51,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:51,921 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:51,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1779748070, now seen corresponding path program 1 times [2019-10-15 01:07:51,922 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:51,923 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822424467] [2019-10-15 01:07:51,923 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:51,923 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:51,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:52,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822424467] [2019-10-15 01:07:52,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954890156] [2019-10-15 01:07:52,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:52,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 01:07:52,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-15 01:07:52,759 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:07:52,901 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:52,901 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-15 01:07:52,901 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438740235] [2019-10-15 01:07:52,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:52,902 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:52,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:52,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:07:52,903 INFO L87 Difference]: Start difference. First operand 764 states and 1220 transitions. Second operand 4 states. [2019-10-15 01:07:54,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:54,054 INFO L93 Difference]: Finished difference Result 2599 states and 4211 transitions. [2019-10-15 01:07:54,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:07:54,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-10-15 01:07:54,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:54,069 INFO L225 Difference]: With dead ends: 2599 [2019-10-15 01:07:54,070 INFO L226 Difference]: Without dead ends: 1984 [2019-10-15 01:07:54,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 246 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:07:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2019-10-15 01:07:54,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1842. [2019-10-15 01:07:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1842 states. [2019-10-15 01:07:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2988 transitions. [2019-10-15 01:07:54,154 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2988 transitions. Word has length 126 [2019-10-15 01:07:54,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:54,155 INFO L462 AbstractCegarLoop]: Abstraction has 1842 states and 2988 transitions. [2019-10-15 01:07:54,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:54,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2988 transitions. [2019-10-15 01:07:54,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-15 01:07:54,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:54,162 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:54,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:54,370 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:54,370 INFO L82 PathProgramCache]: Analyzing trace with hash -979147877, now seen corresponding path program 1 times [2019-10-15 01:07:54,370 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:54,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870541397] [2019-10-15 01:07:54,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:54,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:54,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:54,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870541397] [2019-10-15 01:07:54,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548712642] [2019-10-15 01:07:54,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:55,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 3254 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 01:07:55,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-15 01:07:55,231 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:07:55,431 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:55,431 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 9 [2019-10-15 01:07:55,431 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160827418] [2019-10-15 01:07:55,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:07:55,432 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:55,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:07:55,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:07:55,433 INFO L87 Difference]: Start difference. First operand 1842 states and 2988 transitions. Second operand 7 states. [2019-10-15 01:07:56,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:56,551 INFO L93 Difference]: Finished difference Result 4157 states and 6750 transitions. [2019-10-15 01:07:56,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:07:56,552 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 175 [2019-10-15 01:07:56,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:56,567 INFO L225 Difference]: With dead ends: 4157 [2019-10-15 01:07:56,567 INFO L226 Difference]: Without dead ends: 2464 [2019-10-15 01:07:56,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 337 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:07:56,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2019-10-15 01:07:56,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2460. [2019-10-15 01:07:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2460 states. [2019-10-15 01:07:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3966 transitions. [2019-10-15 01:07:56,683 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3966 transitions. Word has length 175 [2019-10-15 01:07:56,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:56,684 INFO L462 AbstractCegarLoop]: Abstraction has 2460 states and 3966 transitions. [2019-10-15 01:07:56,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:07:56,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3966 transitions. [2019-10-15 01:07:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-15 01:07:56,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:56,692 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:56,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:56,900 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:56,900 INFO L82 PathProgramCache]: Analyzing trace with hash 2093874489, now seen corresponding path program 1 times [2019-10-15 01:07:56,901 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:56,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779575508] [2019-10-15 01:07:56,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:56,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:56,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:57,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779575508] [2019-10-15 01:07:57,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251849563] [2019-10-15 01:07:57,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:57,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 3254 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:07:57,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:57,765 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:57,913 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:57,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-15 01:07:57,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860941129] [2019-10-15 01:07:57,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:57,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:57,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:57,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:07:57,915 INFO L87 Difference]: Start difference. First operand 2460 states and 3966 transitions. Second operand 4 states. [2019-10-15 01:07:58,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:58,021 INFO L93 Difference]: Finished difference Result 4879 states and 7896 transitions. [2019-10-15 01:07:58,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:58,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2019-10-15 01:07:58,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:58,040 INFO L225 Difference]: With dead ends: 4879 [2019-10-15 01:07:58,041 INFO L226 Difference]: Without dead ends: 2437 [2019-10-15 01:07:58,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:07:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2019-10-15 01:07:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 2437. [2019-10-15 01:07:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2437 states. [2019-10-15 01:07:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3919 transitions. [2019-10-15 01:07:58,150 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 3919 transitions. Word has length 176 [2019-10-15 01:07:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:58,151 INFO L462 AbstractCegarLoop]: Abstraction has 2437 states and 3919 transitions. [2019-10-15 01:07:58,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 3919 transitions. [2019-10-15 01:07:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-15 01:07:58,158 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:58,158 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:58,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:58,368 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash 484285150, now seen corresponding path program 1 times [2019-10-15 01:07:58,369 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:58,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758765751] [2019-10-15 01:07:58,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:58,370 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:58,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:58,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758765751] [2019-10-15 01:07:58,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098694086] [2019-10-15 01:07:58,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:59,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 3253 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:59,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:07:59,284 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:59,945 WARN L191 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2019-10-15 01:08:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:00,004 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:00,005 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-10-15 01:08:00,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993326172] [2019-10-15 01:08:00,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:08:00,006 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:00,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:08:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:08:00,007 INFO L87 Difference]: Start difference. First operand 2437 states and 3919 transitions. Second operand 7 states. [2019-10-15 01:08:00,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:00,163 INFO L93 Difference]: Finished difference Result 4848 states and 7797 transitions. [2019-10-15 01:08:00,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:08:00,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 174 [2019-10-15 01:08:00,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:00,189 INFO L225 Difference]: With dead ends: 4848 [2019-10-15 01:08:00,190 INFO L226 Difference]: Without dead ends: 2459 [2019-10-15 01:08:00,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 338 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:08:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2019-10-15 01:08:00,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2431. [2019-10-15 01:08:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2431 states. [2019-10-15 01:08:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 3905 transitions. [2019-10-15 01:08:00,331 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 3905 transitions. Word has length 174 [2019-10-15 01:08:00,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:00,332 INFO L462 AbstractCegarLoop]: Abstraction has 2431 states and 3905 transitions. [2019-10-15 01:08:00,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:08:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 3905 transitions. [2019-10-15 01:08:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-15 01:08:00,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:00,343 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:00,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:00,551 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:00,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:00,552 INFO L82 PathProgramCache]: Analyzing trace with hash 623448220, now seen corresponding path program 1 times [2019-10-15 01:08:00,552 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:00,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788837443] [2019-10-15 01:08:00,552 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:00,552 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:00,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:00,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788837443] [2019-10-15 01:08:00,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825096106] [2019-10-15 01:08:00,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:01,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 3249 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:01,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:08:01,427 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:01,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:01,821 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:01,822 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-15 01:08:01,822 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117323890] [2019-10-15 01:08:01,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:01,823 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:01,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:01,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:08:01,823 INFO L87 Difference]: Start difference. First operand 2431 states and 3905 transitions. Second operand 9 states. [2019-10-15 01:08:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:02,080 INFO L93 Difference]: Finished difference Result 4853 states and 7801 transitions. [2019-10-15 01:08:02,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:08:02,081 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 174 [2019-10-15 01:08:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:02,096 INFO L225 Difference]: With dead ends: 4853 [2019-10-15 01:08:02,096 INFO L226 Difference]: Without dead ends: 2471 [2019-10-15 01:08:02,115 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 333 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:08:02,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-10-15 01:08:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2433. [2019-10-15 01:08:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2019-10-15 01:08:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3909 transitions. [2019-10-15 01:08:02,214 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3909 transitions. Word has length 174 [2019-10-15 01:08:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:02,216 INFO L462 AbstractCegarLoop]: Abstraction has 2433 states and 3909 transitions. [2019-10-15 01:08:02,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:08:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3909 transitions. [2019-10-15 01:08:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-15 01:08:02,223 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:02,223 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:02,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:02,431 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:02,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:02,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2081498303, now seen corresponding path program 1 times [2019-10-15 01:08:02,432 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:02,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789787981] [2019-10-15 01:08:02,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:02,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:02,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:02,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789787981] [2019-10-15 01:08:02,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983770987] [2019-10-15 01:08:02,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:03,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 3250 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:03,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:08:03,399 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:03,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:03,740 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:03,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-15 01:08:03,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595817149] [2019-10-15 01:08:03,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:03,741 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:03,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:03,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:08:03,742 INFO L87 Difference]: Start difference. First operand 2433 states and 3909 transitions. Second operand 9 states. [2019-10-15 01:08:03,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:03,988 INFO L93 Difference]: Finished difference Result 4854 states and 7805 transitions. [2019-10-15 01:08:03,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:08:03,989 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2019-10-15 01:08:03,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:04,004 INFO L225 Difference]: With dead ends: 4854 [2019-10-15 01:08:04,005 INFO L226 Difference]: Without dead ends: 2470 [2019-10-15 01:08:04,014 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 335 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:08:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2019-10-15 01:08:04,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 2433. [2019-10-15 01:08:04,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2019-10-15 01:08:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3909 transitions. [2019-10-15 01:08:04,117 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3909 transitions. Word has length 175 [2019-10-15 01:08:04,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:04,117 INFO L462 AbstractCegarLoop]: Abstraction has 2433 states and 3909 transitions. [2019-10-15 01:08:04,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:08:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3909 transitions. [2019-10-15 01:08:04,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-15 01:08:04,126 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:04,126 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:04,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:04,334 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:04,335 INFO L82 PathProgramCache]: Analyzing trace with hash 945076865, now seen corresponding path program 1 times [2019-10-15 01:08:04,335 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:04,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066302375] [2019-10-15 01:08:04,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:04,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:04,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:04,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066302375] [2019-10-15 01:08:04,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103838056] [2019-10-15 01:08:04,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:05,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 3251 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:05,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:08:05,161 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:05,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:05,574 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:05,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:08:05,575 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636201147] [2019-10-15 01:08:05,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:05,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:05,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:05,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:08:05,576 INFO L87 Difference]: Start difference. First operand 2433 states and 3909 transitions. Second operand 9 states. [2019-10-15 01:08:05,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:05,832 INFO L93 Difference]: Finished difference Result 4855 states and 7809 transitions. [2019-10-15 01:08:05,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:08:05,833 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 176 [2019-10-15 01:08:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:05,857 INFO L225 Difference]: With dead ends: 4855 [2019-10-15 01:08:05,857 INFO L226 Difference]: Without dead ends: 2471 [2019-10-15 01:08:05,872 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 337 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:08:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-10-15 01:08:05,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2433. [2019-10-15 01:08:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2019-10-15 01:08:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3909 transitions. [2019-10-15 01:08:05,954 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3909 transitions. Word has length 176 [2019-10-15 01:08:05,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:05,955 INFO L462 AbstractCegarLoop]: Abstraction has 2433 states and 3909 transitions. [2019-10-15 01:08:05,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:08:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3909 transitions. [2019-10-15 01:08:05,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-15 01:08:05,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:05,964 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:06,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:06,176 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:06,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:06,176 INFO L82 PathProgramCache]: Analyzing trace with hash 984416900, now seen corresponding path program 1 times [2019-10-15 01:08:06,177 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:06,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819062670] [2019-10-15 01:08:06,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:06,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:06,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:06,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819062670] [2019-10-15 01:08:06,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872779356] [2019-10-15 01:08:06,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:06,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 3252 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 01:08:06,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:08:06,985 INFO L321 TraceCheckSpWp]: Computing backward predicates...