/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product09.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:39:55,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:39:55,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:39:55,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:39:55,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:39:55,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:39:55,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:39:55,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:39:55,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:39:55,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:39:55,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:39:55,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:39:55,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:39:55,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:39:55,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:39:55,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:39:55,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:39:55,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:39:55,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:39:55,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:39:55,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:39:55,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:39:55,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:39:55,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:39:55,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:39:55,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:39:55,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:39:55,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:39:55,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:39:55,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:39:55,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:39:55,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:39:55,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:39:55,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:39:55,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:39:55,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:39:55,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:39:55,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:39:55,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:39:55,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:39:55,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:39:55,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:39:55,412 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:39:55,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:39:55,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:39:55,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:39:55,415 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:39:55,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:39:55,415 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:39:55,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:39:55,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:39:55,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:39:55,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:39:55,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:39:55,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:39:55,418 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:39:55,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:39:55,418 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:39:55,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:39:55,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:39:55,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:39:55,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:39:55,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:39:55,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:55,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:39:55,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:39:55,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:39:55,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:39:55,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:39:55,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:39:55,420 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 [2019-11-07 00:39:55,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:39:55,706 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:39:55,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:39:55,710 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:39:55,711 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:39:55,711 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product09.cil.c [2019-11-07 00:39:55,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50274884b/8c967214126c4cb8a98ccdd79dccd405/FLAGf46a4f5a9 [2019-11-07 00:39:56,424 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:39:56,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product09.cil.c [2019-11-07 00:39:56,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50274884b/8c967214126c4cb8a98ccdd79dccd405/FLAGf46a4f5a9 [2019-11-07 00:39:56,607 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50274884b/8c967214126c4cb8a98ccdd79dccd405 [2019-11-07 00:39:56,618 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:39:56,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:39:56,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:56,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:39:56,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:39:56,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:56" (1/1) ... [2019-11-07 00:39:56,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@710c7798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:56, skipping insertion in model container [2019-11-07 00:39:56,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:56" (1/1) ... [2019-11-07 00:39:56,637 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:39:56,718 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:39:57,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:57,465 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:39:57,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:57,669 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:39:57,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:57 WrapperNode [2019-11-07 00:39:57,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:57,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:39:57,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:39:57,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:39:57,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:57" (1/1) ... [2019-11-07 00:39:57,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:57" (1/1) ... [2019-11-07 00:39:57,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:57" (1/1) ... [2019-11-07 00:39:57,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:57" (1/1) ... [2019-11-07 00:39:57,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:57" (1/1) ... [2019-11-07 00:39:57,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:57" (1/1) ... [2019-11-07 00:39:57,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:57" (1/1) ... [2019-11-07 00:39:57,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:39:57,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:39:57,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:39:57,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:39:57,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:57,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:39:57,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:39:57,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:57,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:39:57,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:57,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:57,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:57,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:39:57,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:39:57,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:39:57,955 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:39:57,955 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:39:57,955 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:39:57,956 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:39:57,957 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:39:57,957 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:39:57,960 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:39:57,960 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:39:57,960 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:39:57,961 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:39:57,961 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:39:57,961 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:39:57,961 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:39:57,962 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:39:57,962 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:39:57,962 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:39:57,962 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:39:57,963 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:39:57,963 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:39:57,963 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:39:57,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:39:57,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:39:57,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:39:57,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:39:57,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:39:57,964 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:39:57,964 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:39:57,965 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:39:57,965 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:39:57,965 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:39:57,965 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:39:57,966 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:39:57,966 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:39:57,966 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:39:57,966 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:39:57,967 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:39:57,967 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:39:57,967 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:39:57,967 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:39:57,968 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:39:57,968 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:39:57,968 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:39:57,968 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:39:57,969 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:39:57,969 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:39:57,969 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:39:57,969 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:39:57,969 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:39:57,970 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:39:57,970 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:39:57,970 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:39:57,970 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:39:57,971 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:39:57,971 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:57,972 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:39:57,972 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:39:57,972 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:39:57,972 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:39:57,972 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:39:57,973 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:39:57,973 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:39:57,973 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:39:57,973 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:39:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:39:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:39:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:39:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:39:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:39:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:39:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:39:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:39:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:39:57,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:39:57,977 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:39:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:39:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:39:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:39:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:39:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:39:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:39:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:39:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:39:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:39:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:39:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:39:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:39:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:39:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:39:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:39:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:39:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:39:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:39:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:39:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:39:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:39:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:39:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:39:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:39:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:39:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:39:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:39:57,985 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:39:57,985 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:39:57,986 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:39:57,986 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:39:57,986 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:39:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:39:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:39:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:39:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:39:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:39:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:39:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:39:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:39:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:39:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:39:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:39:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:39:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:39:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:39:57,991 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:39:57,991 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:39:57,992 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:39:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:39:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:39:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:39:57,997 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:39:57,997 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:39:57,998 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:39:57,998 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:39:58,004 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:39:58,005 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:39:58,006 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:39:58,006 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:39:58,006 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:39:58,006 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:39:58,006 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:39:58,007 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:39:58,008 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:39:58,008 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:58,008 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:39:58,008 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:39:58,008 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:39:58,008 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:39:58,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:39:58,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:39:58,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:40:00,387 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:40:00,388 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:40:00,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:00 BoogieIcfgContainer [2019-11-07 00:40:00,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:40:00,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:40:00,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:40:00,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:40:00,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:39:56" (1/3) ... [2019-11-07 00:40:00,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ce334a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:00, skipping insertion in model container [2019-11-07 00:40:00,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:57" (2/3) ... [2019-11-07 00:40:00,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ce334a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:00, skipping insertion in model container [2019-11-07 00:40:00,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:00" (3/3) ... [2019-11-07 00:40:00,399 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product09.cil.c [2019-11-07 00:40:00,409 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:40:00,419 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:40:00,431 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:40:00,470 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:40:00,470 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:40:00,470 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:40:00,470 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:40:00,470 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:40:00,470 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:40:00,470 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:40:00,470 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:40:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states. [2019-11-07 00:40:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-07 00:40:00,546 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:00,547 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:00,549 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:00,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1329174793, now seen corresponding path program 1 times [2019-11-07 00:40:00,565 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:00,566 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578834333] [2019-11-07 00:40:00,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:01,163 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578834333] [2019-11-07 00:40:01,163 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198322837] [2019-11-07 00:40:01,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:01,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 00:40:01,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:01,925 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:02,163 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:02,163 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-11-07 00:40:02,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784816545] [2019-11-07 00:40:02,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:40:02,177 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:02,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:40:02,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:40:02,192 INFO L87 Difference]: Start difference. First operand 738 states. Second operand 2 states. [2019-11-07 00:40:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:02,282 INFO L93 Difference]: Finished difference Result 621 states and 997 transitions. [2019-11-07 00:40:02,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:40:02,283 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 138 [2019-11-07 00:40:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:02,319 INFO L225 Difference]: With dead ends: 621 [2019-11-07 00:40:02,320 INFO L226 Difference]: Without dead ends: 584 [2019-11-07 00:40:02,328 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:40:02,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-07 00:40:02,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-11-07 00:40:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-11-07 00:40:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 942 transitions. [2019-11-07 00:40:02,462 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 942 transitions. Word has length 138 [2019-11-07 00:40:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:02,516 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 942 transitions. [2019-11-07 00:40:02,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:40:02,517 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 942 transitions. [2019-11-07 00:40:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:40:02,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:02,524 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:02,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:02,736 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1202691332, now seen corresponding path program 1 times [2019-11-07 00:40:02,737 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:02,737 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803841997] [2019-11-07 00:40:02,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:02,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803841997] [2019-11-07 00:40:02,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546631552] [2019-11-07 00:40:02,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:03,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:03,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:03,671 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:03,914 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:03,914 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:03,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803792865] [2019-11-07 00:40:03,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:03,916 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:03,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:03,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:03,917 INFO L87 Difference]: Start difference. First operand 584 states and 942 transitions. Second operand 4 states. [2019-11-07 00:40:04,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:04,013 INFO L93 Difference]: Finished difference Result 1140 states and 1857 transitions. [2019-11-07 00:40:04,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:04,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-11-07 00:40:04,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:04,022 INFO L225 Difference]: With dead ends: 1140 [2019-11-07 00:40:04,022 INFO L226 Difference]: Without dead ends: 584 [2019-11-07 00:40:04,031 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:04,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-07 00:40:04,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-11-07 00:40:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-11-07 00:40:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 941 transitions. [2019-11-07 00:40:04,088 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 941 transitions. Word has length 140 [2019-11-07 00:40:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:04,089 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 941 transitions. [2019-11-07 00:40:04,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:04,090 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 941 transitions. [2019-11-07 00:40:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:40:04,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:04,098 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:04,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:04,306 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:04,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:04,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1148939338, now seen corresponding path program 1 times [2019-11-07 00:40:04,307 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:04,307 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320106604] [2019-11-07 00:40:04,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:04,553 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320106604] [2019-11-07 00:40:04,553 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357949638] [2019-11-07 00:40:04,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:05,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:05,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:05,215 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:05,552 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:05,552 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:05,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012776406] [2019-11-07 00:40:05,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:05,553 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:05,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:05,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:05,554 INFO L87 Difference]: Start difference. First operand 584 states and 941 transitions. Second operand 4 states. [2019-11-07 00:40:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:05,630 INFO L93 Difference]: Finished difference Result 1140 states and 1855 transitions. [2019-11-07 00:40:05,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:05,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-11-07 00:40:05,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:05,637 INFO L225 Difference]: With dead ends: 1140 [2019-11-07 00:40:05,637 INFO L226 Difference]: Without dead ends: 584 [2019-11-07 00:40:05,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:05,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-07 00:40:05,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-11-07 00:40:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-11-07 00:40:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 940 transitions. [2019-11-07 00:40:05,667 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 940 transitions. Word has length 142 [2019-11-07 00:40:05,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:05,667 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 940 transitions. [2019-11-07 00:40:05,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 940 transitions. [2019-11-07 00:40:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:40:05,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:05,674 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:05,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:05,882 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:05,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:05,883 INFO L82 PathProgramCache]: Analyzing trace with hash -333550332, now seen corresponding path program 1 times [2019-11-07 00:40:05,883 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:05,884 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435962039] [2019-11-07 00:40:05,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:06,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435962039] [2019-11-07 00:40:06,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371992333] [2019-11-07 00:40:06,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:06,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:06,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:06,758 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:06,971 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:06,971 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:06,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968004822] [2019-11-07 00:40:06,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:06,972 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:06,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:06,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:06,973 INFO L87 Difference]: Start difference. First operand 584 states and 940 transitions. Second operand 4 states. [2019-11-07 00:40:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:07,061 INFO L93 Difference]: Finished difference Result 1147 states and 1862 transitions. [2019-11-07 00:40:07,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:07,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-11-07 00:40:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:07,067 INFO L225 Difference]: With dead ends: 1147 [2019-11-07 00:40:07,067 INFO L226 Difference]: Without dead ends: 593 [2019-11-07 00:40:07,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2019-11-07 00:40:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2019-11-07 00:40:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2019-11-07 00:40:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 952 transitions. [2019-11-07 00:40:07,096 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 952 transitions. Word has length 144 [2019-11-07 00:40:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:07,097 INFO L462 AbstractCegarLoop]: Abstraction has 593 states and 952 transitions. [2019-11-07 00:40:07,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 952 transitions. [2019-11-07 00:40:07,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 00:40:07,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:07,102 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:07,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:07,317 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:07,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2025668661, now seen corresponding path program 1 times [2019-11-07 00:40:07,318 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:07,318 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541772888] [2019-11-07 00:40:07,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:07,443 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541772888] [2019-11-07 00:40:07,443 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156576023] [2019-11-07 00:40:07,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:08,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:08,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:08,120 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:08,337 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:08,337 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:08,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541500380] [2019-11-07 00:40:08,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:08,339 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:08,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:08,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:08,339 INFO L87 Difference]: Start difference. First operand 593 states and 952 transitions. Second operand 4 states. [2019-11-07 00:40:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:08,438 INFO L93 Difference]: Finished difference Result 1149 states and 1863 transitions. [2019-11-07 00:40:08,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:08,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-11-07 00:40:08,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:08,445 INFO L225 Difference]: With dead ends: 1149 [2019-11-07 00:40:08,445 INFO L226 Difference]: Without dead ends: 593 [2019-11-07 00:40:08,450 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:08,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2019-11-07 00:40:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2019-11-07 00:40:08,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2019-11-07 00:40:08,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 951 transitions. [2019-11-07 00:40:08,475 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 951 transitions. Word has length 145 [2019-11-07 00:40:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:08,475 INFO L462 AbstractCegarLoop]: Abstraction has 593 states and 951 transitions. [2019-11-07 00:40:08,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 951 transitions. [2019-11-07 00:40:08,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 00:40:08,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:08,480 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:08,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:08,688 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:08,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1147712472, now seen corresponding path program 1 times [2019-11-07 00:40:08,688 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:08,689 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188918571] [2019-11-07 00:40:08,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:08,797 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188918571] [2019-11-07 00:40:08,797 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152609344] [2019-11-07 00:40:08,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:09,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:09,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:09,515 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:09,732 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:09,732 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:40:09,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945570672] [2019-11-07 00:40:09,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:09,733 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:09,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:40:09,734 INFO L87 Difference]: Start difference. First operand 593 states and 951 transitions. Second operand 4 states. [2019-11-07 00:40:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:09,804 INFO L93 Difference]: Finished difference Result 1149 states and 1862 transitions. [2019-11-07 00:40:09,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:09,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-11-07 00:40:09,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:09,810 INFO L225 Difference]: With dead ends: 1149 [2019-11-07 00:40:09,810 INFO L226 Difference]: Without dead ends: 593 [2019-11-07 00:40:09,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:09,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2019-11-07 00:40:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2019-11-07 00:40:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2019-11-07 00:40:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 950 transitions. [2019-11-07 00:40:09,835 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 950 transitions. Word has length 146 [2019-11-07 00:40:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:09,835 INFO L462 AbstractCegarLoop]: Abstraction has 593 states and 950 transitions. [2019-11-07 00:40:09,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 950 transitions. [2019-11-07 00:40:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:40:09,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:09,840 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:10,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:10,048 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:10,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:10,048 INFO L82 PathProgramCache]: Analyzing trace with hash 261961625, now seen corresponding path program 1 times [2019-11-07 00:40:10,048 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:10,049 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509572799] [2019-11-07 00:40:10,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:10,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509572799] [2019-11-07 00:40:10,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197592513] [2019-11-07 00:40:10,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:10,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:10,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:11,031 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:11,401 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:11,402 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-11-07 00:40:11,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7464266] [2019-11-07 00:40:11,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:40:11,403 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:11,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:40:11,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:11,403 INFO L87 Difference]: Start difference. First operand 593 states and 950 transitions. Second operand 7 states. [2019-11-07 00:40:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:11,531 INFO L93 Difference]: Finished difference Result 1156 states and 1871 transitions. [2019-11-07 00:40:11,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:11,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2019-11-07 00:40:11,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:11,536 INFO L225 Difference]: With dead ends: 1156 [2019-11-07 00:40:11,537 INFO L226 Difference]: Without dead ends: 604 [2019-11-07 00:40:11,540 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 286 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:40:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2019-11-07 00:40:11,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 600. [2019-11-07 00:40:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-11-07 00:40:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 960 transitions. [2019-11-07 00:40:11,563 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 960 transitions. Word has length 147 [2019-11-07 00:40:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:11,564 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 960 transitions. [2019-11-07 00:40:11,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:40:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 960 transitions. [2019-11-07 00:40:11,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 00:40:11,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:11,568 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:11,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:11,785 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:11,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:11,786 INFO L82 PathProgramCache]: Analyzing trace with hash -654338191, now seen corresponding path program 1 times [2019-11-07 00:40:11,786 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:11,787 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027360881] [2019-11-07 00:40:11,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:40:11,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027360881] [2019-11-07 00:40:11,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127172612] [2019-11-07 00:40:11,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:12,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:12,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:12,660 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:12,873 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:12,873 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-11-07 00:40:12,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803275822] [2019-11-07 00:40:12,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:12,874 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:12,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:12,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:12,875 INFO L87 Difference]: Start difference. First operand 600 states and 960 transitions. Second operand 4 states. [2019-11-07 00:40:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:13,031 INFO L93 Difference]: Finished difference Result 1161 states and 1882 transitions. [2019-11-07 00:40:13,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:13,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2019-11-07 00:40:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:13,037 INFO L225 Difference]: With dead ends: 1161 [2019-11-07 00:40:13,038 INFO L226 Difference]: Without dead ends: 600 [2019-11-07 00:40:13,041 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-07 00:40:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-11-07 00:40:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-11-07 00:40:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 955 transitions. [2019-11-07 00:40:13,063 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 955 transitions. Word has length 148 [2019-11-07 00:40:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:13,063 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 955 transitions. [2019-11-07 00:40:13,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 955 transitions. [2019-11-07 00:40:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:40:13,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:13,068 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:13,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:13,276 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:13,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1377855302, now seen corresponding path program 1 times [2019-11-07 00:40:13,277 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:13,277 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928767831] [2019-11-07 00:40:13,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:13,383 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928767831] [2019-11-07 00:40:13,384 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649658491] [2019-11-07 00:40:13,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:14,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:14,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:14,113 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:14,500 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:14,500 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 10 [2019-11-07 00:40:14,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764083302] [2019-11-07 00:40:14,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:40:14,501 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:14,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:40:14,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:14,502 INFO L87 Difference]: Start difference. First operand 600 states and 955 transitions. Second operand 7 states. [2019-11-07 00:40:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:14,649 INFO L93 Difference]: Finished difference Result 1162 states and 1870 transitions. [2019-11-07 00:40:14,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:14,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 150 [2019-11-07 00:40:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:14,656 INFO L225 Difference]: With dead ends: 1162 [2019-11-07 00:40:14,656 INFO L226 Difference]: Without dead ends: 607 [2019-11-07 00:40:14,660 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 290 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-11-07 00:40:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 603. [2019-11-07 00:40:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-07 00:40:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 960 transitions. [2019-11-07 00:40:14,685 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 960 transitions. Word has length 150 [2019-11-07 00:40:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:14,685 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 960 transitions. [2019-11-07 00:40:14,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:40:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 960 transitions. [2019-11-07 00:40:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:40:14,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:14,690 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:14,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:14,897 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1770571481, now seen corresponding path program 1 times [2019-11-07 00:40:14,897 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:14,898 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511005856] [2019-11-07 00:40:14,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:40:15,028 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511005856] [2019-11-07 00:40:15,028 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272491144] [2019-11-07 00:40:15,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:15,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:15,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:15,922 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:16,137 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:16,137 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-11-07 00:40:16,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848005440] [2019-11-07 00:40:16,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:16,141 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:16,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:16,142 INFO L87 Difference]: Start difference. First operand 603 states and 960 transitions. Second operand 4 states. [2019-11-07 00:40:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:16,311 INFO L93 Difference]: Finished difference Result 1167 states and 1880 transitions. [2019-11-07 00:40:16,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:16,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2019-11-07 00:40:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:16,319 INFO L225 Difference]: With dead ends: 1167 [2019-11-07 00:40:16,319 INFO L226 Difference]: Without dead ends: 603 [2019-11-07 00:40:16,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-11-07 00:40:16,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-11-07 00:40:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-07 00:40:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 955 transitions. [2019-11-07 00:40:16,351 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 955 transitions. Word has length 150 [2019-11-07 00:40:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:16,352 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 955 transitions. [2019-11-07 00:40:16,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:16,352 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 955 transitions. [2019-11-07 00:40:16,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-07 00:40:16,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:16,361 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:16,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:16,571 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:16,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:16,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1535082471, now seen corresponding path program 1 times [2019-11-07 00:40:16,573 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:16,573 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658385489] [2019-11-07 00:40:16,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:40:16,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658385489] [2019-11-07 00:40:16,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064533987] [2019-11-07 00:40:16,765 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 [2019-11-07 00:40:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:17,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:17,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:17,525 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:17,762 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:17,762 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-11-07 00:40:17,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269510134] [2019-11-07 00:40:17,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:17,764 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:17,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:17,765 INFO L87 Difference]: Start difference. First operand 603 states and 955 transitions. Second operand 4 states. [2019-11-07 00:40:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:17,978 INFO L93 Difference]: Finished difference Result 1206 states and 1931 transitions. [2019-11-07 00:40:17,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:17,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-11-07 00:40:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:17,983 INFO L225 Difference]: With dead ends: 1206 [2019-11-07 00:40:17,984 INFO L226 Difference]: Without dead ends: 648 [2019-11-07 00:40:17,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2019-11-07 00:40:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 642. [2019-11-07 00:40:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-11-07 00:40:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1017 transitions. [2019-11-07 00:40:18,009 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1017 transitions. Word has length 152 [2019-11-07 00:40:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:18,009 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1017 transitions. [2019-11-07 00:40:18,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:18,010 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1017 transitions. [2019-11-07 00:40:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-07 00:40:18,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:18,014 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:18,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:18,222 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:18,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:18,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1523822727, now seen corresponding path program 1 times [2019-11-07 00:40:18,223 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:18,223 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203311410] [2019-11-07 00:40:18,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:18,322 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203311410] [2019-11-07 00:40:18,322 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098603205] [2019-11-07 00:40:18,322 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 [2019-11-07 00:40:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:19,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:19,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:19,152 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:19,452 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:19,452 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:19,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634802307] [2019-11-07 00:40:19,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:19,454 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:19,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:19,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:19,455 INFO L87 Difference]: Start difference. First operand 642 states and 1017 transitions. Second operand 4 states. [2019-11-07 00:40:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:19,698 INFO L93 Difference]: Finished difference Result 1200 states and 1921 transitions. [2019-11-07 00:40:19,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:19,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-11-07 00:40:19,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:19,705 INFO L225 Difference]: With dead ends: 1200 [2019-11-07 00:40:19,705 INFO L226 Difference]: Without dead ends: 642 [2019-11-07 00:40:19,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-11-07 00:40:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-11-07 00:40:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-11-07 00:40:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1012 transitions. [2019-11-07 00:40:19,751 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1012 transitions. Word has length 152 [2019-11-07 00:40:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:19,752 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1012 transitions. [2019-11-07 00:40:19,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:19,752 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1012 transitions. [2019-11-07 00:40:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-07 00:40:19,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:19,759 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:19,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:19,969 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:19,970 INFO L82 PathProgramCache]: Analyzing trace with hash 819565415, now seen corresponding path program 1 times [2019-11-07 00:40:19,970 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:19,970 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976087960] [2019-11-07 00:40:19,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:20,110 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976087960] [2019-11-07 00:40:20,110 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375352931] [2019-11-07 00:40:20,110 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 [2019-11-07 00:40:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:20,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:20,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:20,936 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:21,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:21,438 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:21,438 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-11-07 00:40:21,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516049492] [2019-11-07 00:40:21,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:40:21,497 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:21,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:40:21,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:21,498 INFO L87 Difference]: Start difference. First operand 642 states and 1012 transitions. Second operand 9 states. [2019-11-07 00:40:21,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:21,708 INFO L93 Difference]: Finished difference Result 1207 states and 1927 transitions. [2019-11-07 00:40:21,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:40:21,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-11-07 00:40:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:21,712 INFO L225 Difference]: With dead ends: 1207 [2019-11-07 00:40:21,713 INFO L226 Difference]: Without dead ends: 653 [2019-11-07 00:40:21,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:40:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-11-07 00:40:21,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 644. [2019-11-07 00:40:21,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2019-11-07 00:40:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1016 transitions. [2019-11-07 00:40:21,737 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1016 transitions. Word has length 152 [2019-11-07 00:40:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:21,737 INFO L462 AbstractCegarLoop]: Abstraction has 644 states and 1016 transitions. [2019-11-07 00:40:21,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:40:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1016 transitions. [2019-11-07 00:40:21,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-07 00:40:21,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:21,742 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:21,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:21,950 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:21,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1494239802, now seen corresponding path program 1 times [2019-11-07 00:40:21,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:21,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544465219] [2019-11-07 00:40:21,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:22,051 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544465219] [2019-11-07 00:40:22,051 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638330775] [2019-11-07 00:40:22,052 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 [2019-11-07 00:40:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:22,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:22,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:22,752 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:23,079 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:23,079 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:40:23,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046044479] [2019-11-07 00:40:23,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:40:23,080 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:23,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:40:23,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:40:23,080 INFO L87 Difference]: Start difference. First operand 644 states and 1016 transitions. Second operand 11 states. [2019-11-07 00:40:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:23,233 INFO L93 Difference]: Finished difference Result 1141 states and 1824 transitions. [2019-11-07 00:40:23,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:40:23,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 152 [2019-11-07 00:40:23,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:23,241 INFO L225 Difference]: With dead ends: 1141 [2019-11-07 00:40:23,241 INFO L226 Difference]: Without dead ends: 661 [2019-11-07 00:40:23,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2019-11-07 00:40:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 651. [2019-11-07 00:40:23,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-11-07 00:40:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1026 transitions. [2019-11-07 00:40:23,265 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1026 transitions. Word has length 152 [2019-11-07 00:40:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:23,265 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1026 transitions. [2019-11-07 00:40:23,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:40:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1026 transitions. [2019-11-07 00:40:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-07 00:40:23,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:23,270 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:23,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:23,477 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:23,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:23,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1825629817, now seen corresponding path program 1 times [2019-11-07 00:40:23,478 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:23,478 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621896655] [2019-11-07 00:40:23,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:23,576 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621896655] [2019-11-07 00:40:23,576 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917820320] [2019-11-07 00:40:23,576 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 [2019-11-07 00:40:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:24,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:24,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:24,424 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:24,630 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:24,631 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:40:24,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491492629] [2019-11-07 00:40:24,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:24,632 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:24,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:24,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:40:24,632 INFO L87 Difference]: Start difference. First operand 651 states and 1026 transitions. Second operand 4 states. [2019-11-07 00:40:24,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:24,807 INFO L93 Difference]: Finished difference Result 1218 states and 1943 transitions. [2019-11-07 00:40:24,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:24,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-11-07 00:40:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:24,811 INFO L225 Difference]: With dead ends: 1218 [2019-11-07 00:40:24,812 INFO L226 Difference]: Without dead ends: 651 [2019-11-07 00:40:24,815 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 304 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-11-07 00:40:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-11-07 00:40:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-11-07 00:40:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1021 transitions. [2019-11-07 00:40:24,838 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1021 transitions. Word has length 154 [2019-11-07 00:40:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:24,838 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1021 transitions. [2019-11-07 00:40:24,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1021 transitions. [2019-11-07 00:40:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-07 00:40:24,843 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:24,843 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:25,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:25,052 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:25,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:25,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2084092048, now seen corresponding path program 1 times [2019-11-07 00:40:25,052 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:25,052 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208718806] [2019-11-07 00:40:25,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:25,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208718806] [2019-11-07 00:40:25,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559495177] [2019-11-07 00:40:25,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-07 00:40:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:25,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 3192 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:25,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:25,882 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:26,183 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:26,183 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-11-07 00:40:26,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615306237] [2019-11-07 00:40:26,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:40:26,184 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:26,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:40:26,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:26,185 INFO L87 Difference]: Start difference. First operand 651 states and 1021 transitions. Second operand 8 states. [2019-11-07 00:40:26,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:26,298 INFO L93 Difference]: Finished difference Result 1145 states and 1826 transitions. [2019-11-07 00:40:26,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:26,298 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 155 [2019-11-07 00:40:26,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:26,302 INFO L225 Difference]: With dead ends: 1145 [2019-11-07 00:40:26,303 INFO L226 Difference]: Without dead ends: 665 [2019-11-07 00:40:26,305 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 301 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2019-11-07 00:40:26,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 658. [2019-11-07 00:40:26,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2019-11-07 00:40:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1032 transitions. [2019-11-07 00:40:26,326 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1032 transitions. Word has length 155 [2019-11-07 00:40:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:26,327 INFO L462 AbstractCegarLoop]: Abstraction has 658 states and 1032 transitions. [2019-11-07 00:40:26,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:40:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1032 transitions. [2019-11-07 00:40:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:40:26,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:26,331 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:26,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:26,538 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:26,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1252866708, now seen corresponding path program 1 times [2019-11-07 00:40:26,539 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:26,540 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824252550] [2019-11-07 00:40:26,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:26,732 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824252550] [2019-11-07 00:40:26,732 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551310510] [2019-11-07 00:40:26,732 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 [2019-11-07 00:40:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:27,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:27,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:27,589 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:27,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:28,106 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:28,106 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-11-07 00:40:28,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511231441] [2019-11-07 00:40:28,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 00:40:28,108 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:28,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 00:40:28,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:28,108 INFO L87 Difference]: Start difference. First operand 658 states and 1032 transitions. Second operand 14 states. [2019-11-07 00:40:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:28,351 INFO L93 Difference]: Finished difference Result 1146 states and 1828 transitions. [2019-11-07 00:40:28,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 00:40:28,351 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2019-11-07 00:40:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:28,357 INFO L225 Difference]: With dead ends: 1146 [2019-11-07 00:40:28,357 INFO L226 Difference]: Without dead ends: 666 [2019-11-07 00:40:28,360 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 292 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:40:28,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-11-07 00:40:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 658. [2019-11-07 00:40:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2019-11-07 00:40:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1032 transitions. [2019-11-07 00:40:28,386 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1032 transitions. Word has length 153 [2019-11-07 00:40:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:28,386 INFO L462 AbstractCegarLoop]: Abstraction has 658 states and 1032 transitions. [2019-11-07 00:40:28,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-07 00:40:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1032 transitions. [2019-11-07 00:40:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-07 00:40:28,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:28,391 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:28,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:28,605 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:28,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:28,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1502376469, now seen corresponding path program 1 times [2019-11-07 00:40:28,606 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:28,606 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815100208] [2019-11-07 00:40:28,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:28,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815100208] [2019-11-07 00:40:28,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520180774] [2019-11-07 00:40:28,694 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 [2019-11-07 00:40:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:29,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:29,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:29,599 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:29,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:30,035 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:30,035 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-11-07 00:40:30,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717855992] [2019-11-07 00:40:30,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:40:30,036 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:30,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:40:30,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:40:30,037 INFO L87 Difference]: Start difference. First operand 658 states and 1032 transitions. Second operand 11 states. [2019-11-07 00:40:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:30,262 INFO L93 Difference]: Finished difference Result 1149 states and 1838 transitions. [2019-11-07 00:40:30,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:40:30,263 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-11-07 00:40:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:30,267 INFO L225 Difference]: With dead ends: 1149 [2019-11-07 00:40:30,267 INFO L226 Difference]: Without dead ends: 669 [2019-11-07 00:40:30,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 295 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:40:30,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2019-11-07 00:40:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 660. [2019-11-07 00:40:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2019-11-07 00:40:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1039 transitions. [2019-11-07 00:40:30,293 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1039 transitions. Word has length 154 [2019-11-07 00:40:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:30,294 INFO L462 AbstractCegarLoop]: Abstraction has 660 states and 1039 transitions. [2019-11-07 00:40:30,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:40:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1039 transitions. [2019-11-07 00:40:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-07 00:40:30,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:30,300 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:30,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:30,502 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:30,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2060036597, now seen corresponding path program 1 times [2019-11-07 00:40:30,503 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:30,503 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377086643] [2019-11-07 00:40:30,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:30,595 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377086643] [2019-11-07 00:40:30,595 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640430142] [2019-11-07 00:40:30,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:31,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:40:31,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:40:31,442 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:31,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:40:31,726 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:31,726 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-11-07 00:40:31,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868397189] [2019-11-07 00:40:31,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:40:31,728 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:31,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:40:31,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:31,730 INFO L87 Difference]: Start difference. First operand 660 states and 1039 transitions. Second operand 9 states. [2019-11-07 00:40:31,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:31,845 INFO L93 Difference]: Finished difference Result 1245 states and 2007 transitions. [2019-11-07 00:40:31,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:31,845 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 157 [2019-11-07 00:40:31,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:31,849 INFO L225 Difference]: With dead ends: 1245 [2019-11-07 00:40:31,850 INFO L226 Difference]: Without dead ends: 669 [2019-11-07 00:40:31,857 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 308 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2019-11-07 00:40:31,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 667. [2019-11-07 00:40:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2019-11-07 00:40:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1047 transitions. [2019-11-07 00:40:31,879 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1047 transitions. Word has length 157 [2019-11-07 00:40:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:31,879 INFO L462 AbstractCegarLoop]: Abstraction has 667 states and 1047 transitions. [2019-11-07 00:40:31,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:40:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1047 transitions. [2019-11-07 00:40:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-07 00:40:31,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:31,883 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]