/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_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:40:29,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:40:29,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:40:29,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:40:29,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:40:29,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:40:29,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:40:29,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:40:29,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:40:29,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:40:29,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:40:29,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:40:29,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:40:29,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:40:29,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:40:29,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:40:29,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:40:29,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:40:29,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:40:29,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:40:29,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:40:29,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:40:29,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:40:29,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:40:29,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:40:29,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:40:29,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:40:29,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:40:29,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:40:29,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:40:29,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:40:29,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:40:29,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:40:29,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:40:29,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:40:29,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:40:29,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:40:29,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:40:29,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:40:29,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:40:29,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:40:29,534 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 00:40:29,552 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:40:29,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:40:29,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:40:29,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:40:29,554 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:40:29,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:40:29,554 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:40:29,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:40:29,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:40:29,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:40:29,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:40:29,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:40:29,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:40:29,556 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:40:29,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:40:29,556 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:40:29,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:40:29,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:40:29,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:40:29,557 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:40:29,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:40:29,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:40:29,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:40:29,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:40:29,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:40:29,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:40:29,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:40:29,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:40:29,559 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 00:40:29,889 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:40:29,902 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:40:29,905 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:40:29,907 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:40:29,907 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:40:29,908 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product21.cil.c [2019-11-07 00:40:29,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b73a472/095fc8b7d3bb46189969c64db1c32a02/FLAG1d7e580fe [2019-11-07 00:40:30,636 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:40:30,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product21.cil.c [2019-11-07 00:40:30,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b73a472/095fc8b7d3bb46189969c64db1c32a02/FLAG1d7e580fe [2019-11-07 00:40:30,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b73a472/095fc8b7d3bb46189969c64db1c32a02 [2019-11-07 00:40:30,818 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:40:30,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:40:30,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:40:30,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:40:30,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:40:30,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:40:30" (1/1) ... [2019-11-07 00:40:30,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16eebeb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:30, skipping insertion in model container [2019-11-07 00:40:30,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:40:30" (1/1) ... [2019-11-07 00:40:30,835 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:40:30,914 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:40:31,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:40:31,611 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:40:31,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:40:31,839 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:40:31,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:31 WrapperNode [2019-11-07 00:40:31,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:40:31,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:40:31,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:40:31,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:40:31,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:31" (1/1) ... [2019-11-07 00:40:31,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:31" (1/1) ... [2019-11-07 00:40:31,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:31" (1/1) ... [2019-11-07 00:40:31,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:31" (1/1) ... [2019-11-07 00:40:31,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:31" (1/1) ... [2019-11-07 00:40:32,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:31" (1/1) ... [2019-11-07 00:40:32,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:31" (1/1) ... [2019-11-07 00:40:32,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:40:32,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:40:32,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:40:32,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:40:32,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:31" (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 00:40:32,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:40:32,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:40:32,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:40:32,130 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:40:32,130 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:40:32,130 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:40:32,130 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:40:32,130 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:40:32,131 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:40:32,131 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:40:32,131 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:40:32,132 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:40:32,132 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:40:32,132 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:40:32,132 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:40:32,133 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:40:32,133 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:40:32,133 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:40:32,133 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:40:32,133 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:40:32,134 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:40:32,134 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:40:32,134 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:40:32,134 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:40:32,135 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:40:32,135 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:40:32,135 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:40:32,135 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:40:32,135 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:40:32,135 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:40:32,137 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:40:32,137 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:40:32,137 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:40:32,137 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:40:32,137 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:40:32,138 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:40:32,138 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:40:32,138 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:40:32,138 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:40:32,138 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:40:32,139 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:40:32,139 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:40:32,139 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:40:32,139 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:40:32,139 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:40:32,139 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:40:32,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:40:32,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:40:32,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:40:32,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:40:32,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:40:32,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:40:32,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:40:32,141 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:40:32,141 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:40:32,141 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:40:32,141 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:40:32,142 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:40:32,142 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:40:32,142 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:40:32,142 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:40:32,142 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:40:32,143 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:40:32,143 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:40:32,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:40:32,143 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:40:32,143 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:40:32,144 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:40:32,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:40:32,144 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:40:32,144 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:40:32,144 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:40:32,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:40:32,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:40:32,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:40:32,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:40:32,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:40:32,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:40:32,146 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:40:32,146 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:40:32,146 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:40:32,146 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:40:32,146 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:40:32,147 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:40:32,147 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:40:32,147 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:40:32,147 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:40:32,147 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:40:32,148 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:40:32,148 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:40:32,148 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:40:32,148 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:40:32,148 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:40:32,148 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:40:32,149 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:40:32,149 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:40:32,149 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:40:32,149 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:40:32,150 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:40:32,150 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:40:32,150 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:40:32,150 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:40:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:40:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:40:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:40:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:40:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:40:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:40:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:40:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:40:32,153 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:40:32,153 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:40:32,153 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:40:32,153 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:40:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:40:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:40:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:40:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:40:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:40:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:40:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:40:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:40:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:40:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:40:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:40:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:40:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:40:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:40:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:40:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:40:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:40:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:40:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:40:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:40:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:40:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:40:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:40:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:40:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:40:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:40:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:40:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:40:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:40:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:40:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:40:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:40:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:40:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:40:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:40:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:40:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:40:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:40:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:40:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:40:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:40:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:40:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:40:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:40:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:40:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:40:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:40:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:40:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:40:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:40:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:40:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:40:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:40:34,780 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:40:34,781 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:40:34,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:34 BoogieIcfgContainer [2019-11-07 00:40:34,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:40:34,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:40:34,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:40:34,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:40:34,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:40:30" (1/3) ... [2019-11-07 00:40:34,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58221b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:34, skipping insertion in model container [2019-11-07 00:40:34,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:31" (2/3) ... [2019-11-07 00:40:34,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58221b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:34, skipping insertion in model container [2019-11-07 00:40:34,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:34" (3/3) ... [2019-11-07 00:40:34,792 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2019-11-07 00:40:34,803 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:40:34,813 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:40:34,826 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:40:34,870 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:40:34,870 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:40:34,870 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:40:34,871 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:40:34,871 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:40:34,871 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:40:34,871 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:40:34,871 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:40:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-07 00:40:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-07 00:40:34,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:34,963 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] [2019-11-07 00:40:34,965 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:34,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:34,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1975081631, now seen corresponding path program 1 times [2019-11-07 00:40:34,982 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:34,982 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357388428] [2019-11-07 00:40:34,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:35,627 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357388428] [2019-11-07 00:40:35,627 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601472390] [2019-11-07 00:40:35,628 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 00:40:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:36,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 3273 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 00:40:36,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:40:36,368 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:40:36,639 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:36,640 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-11-07 00:40:36,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042346812] [2019-11-07 00:40:36,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:40:36,649 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:36,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:40:36,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:40:36,667 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 2 states. [2019-11-07 00:40:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:36,745 INFO L93 Difference]: Finished difference Result 657 states and 1045 transitions. [2019-11-07 00:40:36,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:40:36,747 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 155 [2019-11-07 00:40:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:36,775 INFO L225 Difference]: With dead ends: 657 [2019-11-07 00:40:36,775 INFO L226 Difference]: Without dead ends: 620 [2019-11-07 00:40:36,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 311 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 00:40:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-11-07 00:40:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-11-07 00:40:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-07 00:40:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 990 transitions. [2019-11-07 00:40:36,899 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 990 transitions. Word has length 155 [2019-11-07 00:40:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:36,913 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 990 transitions. [2019-11-07 00:40:36,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:40:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 990 transitions. [2019-11-07 00:40:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-07 00:40:36,926 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:36,926 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, 1] [2019-11-07 00:40:37,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:37,128 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:37,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:37,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1914277300, now seen corresponding path program 1 times [2019-11-07 00:40:37,129 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:37,130 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708105220] [2019-11-07 00:40:37,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:37,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708105220] [2019-11-07 00:40:37,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234274953] [2019-11-07 00:40:37,441 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 00:40:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:38,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 3276 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:38,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:38,144 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:38,420 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:38,420 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:38,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170875708] [2019-11-07 00:40:38,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:38,424 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:38,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:38,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:38,426 INFO L87 Difference]: Start difference. First operand 620 states and 990 transitions. Second operand 4 states. [2019-11-07 00:40:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:38,566 INFO L93 Difference]: Finished difference Result 1212 states and 1953 transitions. [2019-11-07 00:40:38,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:38,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-11-07 00:40:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:38,574 INFO L225 Difference]: With dead ends: 1212 [2019-11-07 00:40:38,574 INFO L226 Difference]: Without dead ends: 620 [2019-11-07 00:40:38,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-11-07 00:40:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-11-07 00:40:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-07 00:40:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 989 transitions. [2019-11-07 00:40:38,660 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 989 transitions. Word has length 157 [2019-11-07 00:40:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:38,663 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 989 transitions. [2019-11-07 00:40:38,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 989 transitions. [2019-11-07 00:40:38,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-07 00:40:38,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:38,676 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, 1, 1, 1, 1, 1] [2019-11-07 00:40:38,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:38,884 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash 511513774, now seen corresponding path program 1 times [2019-11-07 00:40:38,885 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:38,885 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622798157] [2019-11-07 00:40:38,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:39,128 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622798157] [2019-11-07 00:40:39,129 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919546426] [2019-11-07 00:40:39,129 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 00:40:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:39,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 3278 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:39,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:39,839 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:40,106 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:40,106 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:40,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309241694] [2019-11-07 00:40:40,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:40,108 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:40,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:40,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:40,108 INFO L87 Difference]: Start difference. First operand 620 states and 989 transitions. Second operand 4 states. [2019-11-07 00:40:40,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:40,217 INFO L93 Difference]: Finished difference Result 1212 states and 1951 transitions. [2019-11-07 00:40:40,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:40,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2019-11-07 00:40:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:40,225 INFO L225 Difference]: With dead ends: 1212 [2019-11-07 00:40:40,225 INFO L226 Difference]: Without dead ends: 620 [2019-11-07 00:40:40,229 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 314 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 00:40:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-11-07 00:40:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-11-07 00:40:40,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-07 00:40:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 988 transitions. [2019-11-07 00:40:40,304 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 988 transitions. Word has length 159 [2019-11-07 00:40:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:40,304 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 988 transitions. [2019-11-07 00:40:40,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 988 transitions. [2019-11-07 00:40:40,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:40:40,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:40,310 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:40,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:40,517 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:40,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:40,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1781427860, now seen corresponding path program 1 times [2019-11-07 00:40:40,519 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:40,519 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793494249] [2019-11-07 00:40:40,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:40,656 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 00:40:40,656 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793494249] [2019-11-07 00:40:40,656 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322850320] [2019-11-07 00:40:40,657 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 00:40:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:41,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:41,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:41,276 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:41,599 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 00:40:41,599 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:41,600 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:41,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234950047] [2019-11-07 00:40:41,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:41,601 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:41,603 INFO L87 Difference]: Start difference. First operand 620 states and 988 transitions. Second operand 4 states. [2019-11-07 00:40:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:41,693 INFO L93 Difference]: Finished difference Result 1219 states and 1958 transitions. [2019-11-07 00:40:41,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:41,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-11-07 00:40:41,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:41,699 INFO L225 Difference]: With dead ends: 1219 [2019-11-07 00:40:41,699 INFO L226 Difference]: Without dead ends: 629 [2019-11-07 00:40:41,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 318 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 00:40:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-07 00:40:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-11-07 00:40:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-11-07 00:40:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1000 transitions. [2019-11-07 00:40:41,726 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1000 transitions. Word has length 161 [2019-11-07 00:40:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:41,727 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1000 transitions. [2019-11-07 00:40:41,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1000 transitions. [2019-11-07 00:40:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-07 00:40:41,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:41,733 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:41,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:41,940 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:41,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash -831391142, now seen corresponding path program 1 times [2019-11-07 00:40:41,941 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:41,942 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696785111] [2019-11-07 00:40:41,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:42,069 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 00:40:42,069 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696785111] [2019-11-07 00:40:42,070 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627004594] [2019-11-07 00:40:42,070 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 00:40:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:42,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 3281 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:42,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:42,710 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:43,150 WARN L191 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-11-07 00:40:43,402 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 00:40:43,403 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:43,404 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:43,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001696988] [2019-11-07 00:40:43,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:43,408 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:43,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:43,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:43,410 INFO L87 Difference]: Start difference. First operand 629 states and 1000 transitions. Second operand 4 states. [2019-11-07 00:40:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:43,491 INFO L93 Difference]: Finished difference Result 1221 states and 1959 transitions. [2019-11-07 00:40:43,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:43,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-11-07 00:40:43,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:43,497 INFO L225 Difference]: With dead ends: 1221 [2019-11-07 00:40:43,498 INFO L226 Difference]: Without dead ends: 629 [2019-11-07 00:40:43,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 320 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 00:40:43,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-07 00:40:43,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-11-07 00:40:43,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-11-07 00:40:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 999 transitions. [2019-11-07 00:40:43,531 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 999 transitions. Word has length 162 [2019-11-07 00:40:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:43,532 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 999 transitions. [2019-11-07 00:40:43,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 999 transitions. [2019-11-07 00:40:43,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-07 00:40:43,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:43,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:43,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:43,756 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:43,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:43,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1680400040, now seen corresponding path program 1 times [2019-11-07 00:40:43,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:43,757 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833329133] [2019-11-07 00:40:43,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:43,969 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 00:40:43,969 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833329133] [2019-11-07 00:40:43,969 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61014873] [2019-11-07 00:40:43,970 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 00:40:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:44,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:44,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:44,660 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:44,964 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 00:40:44,965 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:44,966 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:40:44,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12958480] [2019-11-07 00:40:44,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:44,968 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:44,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:44,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:40:44,968 INFO L87 Difference]: Start difference. First operand 629 states and 999 transitions. Second operand 4 states. [2019-11-07 00:40:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:45,041 INFO L93 Difference]: Finished difference Result 1221 states and 1958 transitions. [2019-11-07 00:40:45,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:45,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-11-07 00:40:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:45,050 INFO L225 Difference]: With dead ends: 1221 [2019-11-07 00:40:45,051 INFO L226 Difference]: Without dead ends: 629 [2019-11-07 00:40:45,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 322 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 00:40:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-07 00:40:45,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-11-07 00:40:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-11-07 00:40:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 998 transitions. [2019-11-07 00:40:45,079 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 998 transitions. Word has length 163 [2019-11-07 00:40:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:45,081 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 998 transitions. [2019-11-07 00:40:45,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 998 transitions. [2019-11-07 00:40:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:40:45,085 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:45,085 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:45,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:45,294 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:45,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:45,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1066972054, now seen corresponding path program 1 times [2019-11-07 00:40:45,295 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:45,296 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091369060] [2019-11-07 00:40:45,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:40:45,463 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091369060] [2019-11-07 00:40:45,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219833871] [2019-11-07 00:40:45,464 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 00:40:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:46,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:46,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:40:46,201 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:40:46,618 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:46,618 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-11-07 00:40:46,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693758050] [2019-11-07 00:40:46,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:40:46,619 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:46,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:40:46,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:46,620 INFO L87 Difference]: Start difference. First operand 629 states and 998 transitions. Second operand 7 states. [2019-11-07 00:40:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:46,761 INFO L93 Difference]: Finished difference Result 1228 states and 1967 transitions. [2019-11-07 00:40:46,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:46,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 164 [2019-11-07 00:40:46,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:46,767 INFO L225 Difference]: With dead ends: 1228 [2019-11-07 00:40:46,767 INFO L226 Difference]: Without dead ends: 640 [2019-11-07 00:40:46,770 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 320 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 00:40:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2019-11-07 00:40:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 636. [2019-11-07 00:40:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-11-07 00:40:46,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1008 transitions. [2019-11-07 00:40:46,794 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1008 transitions. Word has length 164 [2019-11-07 00:40:46,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:46,794 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1008 transitions. [2019-11-07 00:40:46,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:40:46,795 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1008 transitions. [2019-11-07 00:40:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:40:46,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:46,800 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:47,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:47,008 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:47,008 INFO L82 PathProgramCache]: Analyzing trace with hash 774586229, now seen corresponding path program 1 times [2019-11-07 00:40:47,009 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:47,009 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322802267] [2019-11-07 00:40:47,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:47,138 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 00:40:47,144 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322802267] [2019-11-07 00:40:47,145 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57464129] [2019-11-07 00:40:47,145 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 00:40:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:47,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:47,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:40:47,876 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:48,127 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 00:40:48,127 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:48,128 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:48,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564834328] [2019-11-07 00:40:48,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:48,129 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:48,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:48,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:48,129 INFO L87 Difference]: Start difference. First operand 636 states and 1008 transitions. Second operand 4 states. [2019-11-07 00:40:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:48,287 INFO L93 Difference]: Finished difference Result 1233 states and 1978 transitions. [2019-11-07 00:40:48,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:48,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-11-07 00:40:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:48,293 INFO L225 Difference]: With dead ends: 1233 [2019-11-07 00:40:48,293 INFO L226 Difference]: Without dead ends: 636 [2019-11-07 00:40:48,297 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 324 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 00:40:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-11-07 00:40:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-11-07 00:40:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-11-07 00:40:48,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1003 transitions. [2019-11-07 00:40:48,325 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1003 transitions. Word has length 164 [2019-11-07 00:40:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:48,326 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1003 transitions. [2019-11-07 00:40:48,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1003 transitions. [2019-11-07 00:40:48,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-07 00:40:48,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:48,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:48,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:48,539 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:48,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:48,540 INFO L82 PathProgramCache]: Analyzing trace with hash -893831295, now seen corresponding path program 1 times [2019-11-07 00:40:48,540 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:48,541 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348895090] [2019-11-07 00:40:48,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:48,737 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348895090] [2019-11-07 00:40:48,737 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118300176] [2019-11-07 00:40:48,737 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 00:40:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:49,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:49,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:40:49,523 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:49,774 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:49,775 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-11-07 00:40:49,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841870417] [2019-11-07 00:40:49,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:49,778 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:49,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:49,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:49,779 INFO L87 Difference]: Start difference. First operand 636 states and 1003 transitions. Second operand 4 states. [2019-11-07 00:40:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:49,945 INFO L93 Difference]: Finished difference Result 1233 states and 1968 transitions. [2019-11-07 00:40:49,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:49,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-11-07 00:40:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:49,951 INFO L225 Difference]: With dead ends: 1233 [2019-11-07 00:40:49,951 INFO L226 Difference]: Without dead ends: 636 [2019-11-07 00:40:49,954 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 331 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 00:40:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-11-07 00:40:49,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-11-07 00:40:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-11-07 00:40:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 998 transitions. [2019-11-07 00:40:49,984 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 998 transitions. Word has length 167 [2019-11-07 00:40:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:49,987 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 998 transitions. [2019-11-07 00:40:49,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 998 transitions. [2019-11-07 00:40:49,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-07 00:40:49,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:49,993 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, 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 00:40:50,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:50,201 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:50,202 INFO L82 PathProgramCache]: Analyzing trace with hash 241086921, now seen corresponding path program 1 times [2019-11-07 00:40:50,202 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:50,203 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505870494] [2019-11-07 00:40:50,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:50,335 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505870494] [2019-11-07 00:40:50,335 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497167887] [2019-11-07 00:40:50,335 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 00:40:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:51,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:51,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:40:51,276 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:51,516 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:51,516 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-11-07 00:40:51,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535197252] [2019-11-07 00:40:51,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:51,517 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:51,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:51,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:51,518 INFO L87 Difference]: Start difference. First operand 636 states and 998 transitions. Second operand 4 states. [2019-11-07 00:40:51,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:51,709 INFO L93 Difference]: Finished difference Result 1269 states and 2016 transitions. [2019-11-07 00:40:51,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:51,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-11-07 00:40:51,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:51,716 INFO L225 Difference]: With dead ends: 1269 [2019-11-07 00:40:51,716 INFO L226 Difference]: Without dead ends: 678 [2019-11-07 00:40:51,719 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 335 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 00:40:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2019-11-07 00:40:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 675. [2019-11-07 00:40:51,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2019-11-07 00:40:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1061 transitions. [2019-11-07 00:40:51,757 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1061 transitions. Word has length 169 [2019-11-07 00:40:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:51,757 INFO L462 AbstractCegarLoop]: Abstraction has 675 states and 1061 transitions. [2019-11-07 00:40:51,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1061 transitions. [2019-11-07 00:40:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-07 00:40:51,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:51,763 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:51,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:51,972 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:51,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:51,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1461572905, now seen corresponding path program 1 times [2019-11-07 00:40:51,972 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:51,972 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766130803] [2019-11-07 00:40:51,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:40:52,081 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766130803] [2019-11-07 00:40:52,082 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65315923] [2019-11-07 00:40:52,082 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 00:40:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:52,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 3287 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:52,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:40:52,792 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:53,033 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:53,033 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:53,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792426927] [2019-11-07 00:40:53,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:53,034 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:53,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:53,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:53,035 INFO L87 Difference]: Start difference. First operand 675 states and 1061 transitions. Second operand 4 states. [2019-11-07 00:40:53,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:53,223 INFO L93 Difference]: Finished difference Result 1269 states and 2014 transitions. [2019-11-07 00:40:53,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:53,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-11-07 00:40:53,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:53,229 INFO L225 Difference]: With dead ends: 1269 [2019-11-07 00:40:53,229 INFO L226 Difference]: Without dead ends: 675 [2019-11-07 00:40:53,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 334 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 00:40:53,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2019-11-07 00:40:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 675. [2019-11-07 00:40:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2019-11-07 00:40:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1056 transitions. [2019-11-07 00:40:53,258 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1056 transitions. Word has length 169 [2019-11-07 00:40:53,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:53,258 INFO L462 AbstractCegarLoop]: Abstraction has 675 states and 1056 transitions. [2019-11-07 00:40:53,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1056 transitions. [2019-11-07 00:40:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-07 00:40:53,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:53,264 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, 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 00:40:53,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:53,475 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:53,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:53,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2144540106, now seen corresponding path program 1 times [2019-11-07 00:40:53,476 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:53,476 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618675543] [2019-11-07 00:40:53,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:53,668 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 00:40:53,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618675543] [2019-11-07 00:40:53,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951780626] [2019-11-07 00:40:53,669 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 00:40:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:54,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:54,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:40:54,416 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:40:54,762 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:54,762 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:40:54,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000387192] [2019-11-07 00:40:54,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:40:54,763 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:54,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:40:54,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:40:54,763 INFO L87 Difference]: Start difference. First operand 675 states and 1056 transitions. Second operand 11 states. [2019-11-07 00:40:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:54,909 INFO L93 Difference]: Finished difference Result 1206 states and 1909 transitions. [2019-11-07 00:40:54,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:40:54,910 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 169 [2019-11-07 00:40:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:54,914 INFO L225 Difference]: With dead ends: 1206 [2019-11-07 00:40:54,915 INFO L226 Difference]: Without dead ends: 690 [2019-11-07 00:40:54,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 329 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-11-07 00:40:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 682. [2019-11-07 00:40:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-07 00:40:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1065 transitions. [2019-11-07 00:40:54,939 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1065 transitions. Word has length 169 [2019-11-07 00:40:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:54,939 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1065 transitions. [2019-11-07 00:40:54,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:40:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1065 transitions. [2019-11-07 00:40:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:40:54,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:54,944 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:55,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:55,152 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:55,153 INFO L82 PathProgramCache]: Analyzing trace with hash 418081852, now seen corresponding path program 1 times [2019-11-07 00:40:55,153 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:55,153 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023757934] [2019-11-07 00:40:55,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:40:55,276 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023757934] [2019-11-07 00:40:55,276 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958846964] [2019-11-07 00:40:55,276 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 00:40:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:56,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 3285 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:56,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:40:56,217 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:56,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 00:40:56,723 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:56,723 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-11-07 00:40:56,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746466425] [2019-11-07 00:40:56,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:40:56,724 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:56,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:40:56,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:56,725 INFO L87 Difference]: Start difference. First operand 682 states and 1065 transitions. Second operand 9 states. [2019-11-07 00:40:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:56,930 INFO L93 Difference]: Finished difference Result 1285 states and 2031 transitions. [2019-11-07 00:40:56,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:40:56,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 170 [2019-11-07 00:40:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:56,935 INFO L225 Difference]: With dead ends: 1285 [2019-11-07 00:40:56,935 INFO L226 Difference]: Without dead ends: 690 [2019-11-07 00:40:56,939 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 325 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 00:40:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-11-07 00:40:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 684. [2019-11-07 00:40:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-11-07 00:40:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1070 transitions. [2019-11-07 00:40:56,963 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1070 transitions. Word has length 170 [2019-11-07 00:40:56,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:56,964 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 1070 transitions. [2019-11-07 00:40:56,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:40:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1070 transitions. [2019-11-07 00:40:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-07 00:40:56,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:56,968 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, 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 00:40:57,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:57,178 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:57,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:57,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1600776161, now seen corresponding path program 1 times [2019-11-07 00:40:57,179 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:57,180 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741821179] [2019-11-07 00:40:57,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:57,290 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 00:40:57,291 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741821179] [2019-11-07 00:40:57,291 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868863729] [2019-11-07 00:40:57,291 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 00:40:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:58,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 3289 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:58,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:40:58,090 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:58,341 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:58,341 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:40:58,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061945287] [2019-11-07 00:40:58,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:58,342 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:58,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:58,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:40:58,342 INFO L87 Difference]: Start difference. First operand 684 states and 1070 transitions. Second operand 4 states. [2019-11-07 00:40:58,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:58,533 INFO L93 Difference]: Finished difference Result 1287 states and 2037 transitions. [2019-11-07 00:40:58,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:58,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-11-07 00:40:58,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:58,538 INFO L225 Difference]: With dead ends: 1287 [2019-11-07 00:40:58,538 INFO L226 Difference]: Without dead ends: 684 [2019-11-07 00:40:58,542 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 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 00:40:58,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-11-07 00:40:58,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2019-11-07 00:40:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-11-07 00:40:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1065 transitions. [2019-11-07 00:40:58,567 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1065 transitions. Word has length 171 [2019-11-07 00:40:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:58,568 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 1065 transitions. [2019-11-07 00:40:58,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1065 transitions. [2019-11-07 00:40:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-07 00:40:58,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:58,572 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, 1, 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 00:40:58,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:58,788 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1668287785, now seen corresponding path program 1 times [2019-11-07 00:40:58,789 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:58,789 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560830108] [2019-11-07 00:40:58,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:58,964 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 00:40:58,965 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560830108] [2019-11-07 00:40:58,965 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539382957] [2019-11-07 00:40:58,965 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 00:40:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:59,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:59,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:40:59,824 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:41:00,164 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:00,164 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-11-07 00:41:00,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883672405] [2019-11-07 00:41:00,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:41:00,165 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:00,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:41:00,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:41:00,165 INFO L87 Difference]: Start difference. First operand 684 states and 1065 transitions. Second operand 8 states. [2019-11-07 00:41:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:00,268 INFO L93 Difference]: Finished difference Result 1214 states and 1920 transitions. [2019-11-07 00:41:00,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:41:00,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 172 [2019-11-07 00:41:00,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:00,273 INFO L225 Difference]: With dead ends: 1214 [2019-11-07 00:41:00,273 INFO L226 Difference]: Without dead ends: 698 [2019-11-07 00:41:00,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 335 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 00:41:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2019-11-07 00:41:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 691. [2019-11-07 00:41:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2019-11-07 00:41:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1076 transitions. [2019-11-07 00:41:00,302 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1076 transitions. Word has length 172 [2019-11-07 00:41:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:00,302 INFO L462 AbstractCegarLoop]: Abstraction has 691 states and 1076 transitions. [2019-11-07 00:41:00,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:41:00,303 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1076 transitions. [2019-11-07 00:41:00,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:41:00,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:00,307 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, 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] [2019-11-07 00:41:00,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:00,515 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:00,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:00,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1493406043, now seen corresponding path program 1 times [2019-11-07 00:41:00,516 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:00,516 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386152371] [2019-11-07 00:41:00,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:41:00,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386152371] [2019-11-07 00:41:00,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747033677] [2019-11-07 00:41:00,606 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 00:41:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:01,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:41:01,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 00:41:01,535 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:01,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 00:41:02,043 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:02,043 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-11-07 00:41:02,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998361113] [2019-11-07 00:41:02,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 00:41:02,044 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:02,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 00:41:02,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:41:02,045 INFO L87 Difference]: Start difference. First operand 691 states and 1076 transitions. Second operand 14 states. [2019-11-07 00:41:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:02,294 INFO L93 Difference]: Finished difference Result 1215 states and 1920 transitions. [2019-11-07 00:41:02,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 00:41:02,294 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 170 [2019-11-07 00:41:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:02,301 INFO L225 Difference]: With dead ends: 1215 [2019-11-07 00:41:02,301 INFO L226 Difference]: Without dead ends: 699 [2019-11-07 00:41:02,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 326 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 00:41:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-11-07 00:41:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 691. [2019-11-07 00:41:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2019-11-07 00:41:02,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1076 transitions. [2019-11-07 00:41:02,333 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1076 transitions. Word has length 170 [2019-11-07 00:41:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:02,333 INFO L462 AbstractCegarLoop]: Abstraction has 691 states and 1076 transitions. [2019-11-07 00:41:02,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-07 00:41:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1076 transitions. [2019-11-07 00:41:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-07 00:41:02,338 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:02,339 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, 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 00:41:02,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:02,556 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:02,556 INFO L82 PathProgramCache]: Analyzing trace with hash 297236815, now seen corresponding path program 1 times [2019-11-07 00:41:02,557 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:02,557 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829175339] [2019-11-07 00:41:02,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:41:02,646 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829175339] [2019-11-07 00:41:02,646 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419722513] [2019-11-07 00:41:02,647 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 00:41:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:03,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 3281 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:41:03,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 00:41:03,518 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:03,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 00:41:03,959 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:03,960 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-11-07 00:41:03,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119949482] [2019-11-07 00:41:03,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:41:03,961 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:03,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:41:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:41:03,961 INFO L87 Difference]: Start difference. First operand 691 states and 1076 transitions. Second operand 11 states. [2019-11-07 00:41:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:04,178 INFO L93 Difference]: Finished difference Result 1216 states and 1928 transitions. [2019-11-07 00:41:04,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:41:04,179 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2019-11-07 00:41:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:04,185 INFO L225 Difference]: With dead ends: 1216 [2019-11-07 00:41:04,185 INFO L226 Difference]: Without dead ends: 700 [2019-11-07 00:41:04,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 329 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 00:41:04,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-11-07 00:41:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 693. [2019-11-07 00:41:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-11-07 00:41:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1082 transitions. [2019-11-07 00:41:04,222 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1082 transitions. Word has length 171 [2019-11-07 00:41:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:04,222 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1082 transitions. [2019-11-07 00:41:04,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:41:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1082 transitions. [2019-11-07 00:41:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-07 00:41:04,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:04,226 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:04,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:04,434 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:04,435 INFO L82 PathProgramCache]: Analyzing trace with hash 119452512, now seen corresponding path program 1 times [2019-11-07 00:41:04,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:04,436 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877299075] [2019-11-07 00:41:04,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:41:04,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877299075] [2019-11-07 00:41:04,521 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485070293] [2019-11-07 00:41:04,521 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 00:41:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:05,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:41:05,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:41:05,493 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:05,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:41:05,810 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:05,810 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-11-07 00:41:05,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326304583] [2019-11-07 00:41:05,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:41:05,811 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:05,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:41:05,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:41:05,811 INFO L87 Difference]: Start difference. First operand 693 states and 1082 transitions. Second operand 9 states. [2019-11-07 00:41:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:05,936 INFO L93 Difference]: Finished difference Result 1312 states and 2093 transitions. [2019-11-07 00:41:05,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:41:05,936 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 172 [2019-11-07 00:41:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:05,940 INFO L225 Difference]: With dead ends: 1312 [2019-11-07 00:41:05,940 INFO L226 Difference]: Without dead ends: 702 [2019-11-07 00:41:05,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 338 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 00:41:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-11-07 00:41:05,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 700. [2019-11-07 00:41:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-11-07 00:41:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1090 transitions. [2019-11-07 00:41:05,964 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1090 transitions. Word has length 172 [2019-11-07 00:41:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:05,966 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1090 transitions. [2019-11-07 00:41:05,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:41:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1090 transitions. [2019-11-07 00:41:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-07 00:41:05,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:05,970 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]