/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_product03.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:39:52,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:39:52,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:39:52,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:39:52,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:39:52,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:39:52,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:39:52,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:39:52,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:39:52,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:39:52,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:39:52,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:39:52,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:39:52,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:39:52,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:39:52,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:39:52,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:39:52,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:39:52,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:39:52,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:39:52,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:39:52,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:39:52,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:39:52,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:39:52,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:39:52,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:39:52,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:39:52,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:39:52,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:39:52,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:39:52,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:39:52,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:39:52,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:39:52,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:39:52,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:39:52,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:39:52,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:39:52,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:39:52,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:39:52,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:39:52,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:39:52,585 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:39:52,604 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:39:52,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:39:52,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:39:52,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:39:52,607 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:39:52,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:39:52,608 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:39:52,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:39:52,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:39:52,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:39:52,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:39:52,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:39:52,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:39:52,611 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:39:52,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:39:52,611 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:39:52,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:39:52,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:39:52,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:39:52,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:39:52,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:39:52,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:52,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:39:52,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:39:52,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:39:52,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:39:52,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:39:52,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:39:52,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:39:52,897 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:39:52,916 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:39:52,919 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:39:52,921 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:39:52,921 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:39:52,922 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product03.cil.c [2019-11-07 00:39:52,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676e7267e/3318e00b4bd24d6f9c31a333ded35837/FLAG3123ca748 [2019-11-07 00:39:53,644 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:39:53,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product03.cil.c [2019-11-07 00:39:53,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676e7267e/3318e00b4bd24d6f9c31a333ded35837/FLAG3123ca748 [2019-11-07 00:39:53,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676e7267e/3318e00b4bd24d6f9c31a333ded35837 [2019-11-07 00:39:53,871 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:39:53,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:39:53,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:53,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:39:53,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:39:53,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:53" (1/1) ... [2019-11-07 00:39:53,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ecdec29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:53, skipping insertion in model container [2019-11-07 00:39:53,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:53" (1/1) ... [2019-11-07 00:39:53,912 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:39:54,043 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:39:54,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:54,781 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:39:54,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:54,990 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:39:54,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:54 WrapperNode [2019-11-07 00:39:54,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:54,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:39:54,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:39:54,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:39:55,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:54" (1/1) ... [2019-11-07 00:39:55,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:54" (1/1) ... [2019-11-07 00:39:55,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:54" (1/1) ... [2019-11-07 00:39:55,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:54" (1/1) ... [2019-11-07 00:39:55,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:54" (1/1) ... [2019-11-07 00:39:55,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:54" (1/1) ... [2019-11-07 00:39:55,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:54" (1/1) ... [2019-11-07 00:39:55,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:39:55,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:39:55,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:39:55,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:39:55,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:55,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:39:55,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:39:55,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:55,278 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:39:55,278 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:39:55,279 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:39:55,279 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:39:55,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:55,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:55,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:55,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:39:55,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:39:55,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:39:55,282 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:39:55,283 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:39:55,283 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:39:55,285 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:39:55,285 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:39:55,285 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:39:55,286 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:39:55,286 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:39:55,286 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:39:55,286 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:39:55,287 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:39:55,287 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:39:55,287 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:39:55,287 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:39:55,288 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:39:55,288 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:39:55,288 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:39:55,288 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__base [2019-11-07 00:39:55,288 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:39:55,288 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:39:55,289 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:39:55,289 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2019-11-07 00:39:55,289 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:55,289 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:39:55,290 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:39:55,290 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:39:55,290 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:39:55,290 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:39:55,290 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:39:55,290 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:39:55,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:39:55,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:39:55,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:39:55,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:39:55,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:39:55,291 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:39:55,292 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:39:55,292 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:39:55,292 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:39:55,292 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:39:55,292 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:39:55,293 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:39:55,293 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:39:55,293 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:39:55,293 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:39:55,293 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:39:55,293 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:39:55,294 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:39:55,294 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:39:55,294 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:39:55,294 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:39:55,295 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:39:55,295 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:39:55,295 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:39:55,295 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:39:55,295 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:39:55,295 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:39:55,296 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:39:55,296 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:39:55,296 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:39:55,297 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:39:55,297 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:39:55,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:39:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:39:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:39:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:39:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:39:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:39:55,299 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:39:55,299 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:39:55,299 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:39:55,300 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:39:55,300 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:39:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:39:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:39:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:39:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:39:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:39:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:39:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:39:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:39:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:39:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:39:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:39:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:39:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:39:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:39:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:39:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:39:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:39:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:39:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:39:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:39:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:39:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:39:55,306 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:39:55,306 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:39:55,306 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:39:55,306 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:39:55,306 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:39:55,307 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:39:55,307 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:39:55,307 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:39:55,308 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:39:55,308 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:39:55,308 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:39:55,308 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:39:55,310 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:39:55,310 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:39:55,310 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:39:55,310 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:39:55,310 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:39:55,310 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:39:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:39:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:39:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:39:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:39:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__base [2019-11-07 00:39:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:39:55,313 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:39:55,316 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2019-11-07 00:39:55,316 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:39:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:39:55,318 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:39:55,318 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:39:55,318 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:39:55,326 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:39:55,327 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:39:55,327 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:39:55,327 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:39:55,327 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:39:55,327 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:39:55,327 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:39:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:39:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:39:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:39:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:39:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:39:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:39:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:39:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:39:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:39:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:39:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:39:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:39:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:39:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:39:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:39:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:39:57,634 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:39:57,635 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:39:57,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:57 BoogieIcfgContainer [2019-11-07 00:39:57,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:39:57,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:39:57,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:39:57,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:39:57,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:39:53" (1/3) ... [2019-11-07 00:39:57,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee5a862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:57, skipping insertion in model container [2019-11-07 00:39:57,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:54" (2/3) ... [2019-11-07 00:39:57,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee5a862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:57, skipping insertion in model container [2019-11-07 00:39:57,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:57" (3/3) ... [2019-11-07 00:39:57,645 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product03.cil.c [2019-11-07 00:39:57,655 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:39:57,665 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:39:57,678 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:39:57,732 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:39:57,732 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:39:57,732 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:39:57,732 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:39:57,733 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:39:57,733 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:39:57,733 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:39:57,733 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:39:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states. [2019-11-07 00:39:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:39:57,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:57,811 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:57,814 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:57,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:57,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1215975064, now seen corresponding path program 1 times [2019-11-07 00:39:57,829 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:57,830 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205895711] [2019-11-07 00:39:57,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:39:58,428 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205895711] [2019-11-07 00:39:58,429 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265335274] [2019-11-07 00:39:58,429 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 00:39:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:59,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 3256 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 00:39:59,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:39:59,276 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:39:59,619 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:59,619 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-11-07 00:39:59,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534540572] [2019-11-07 00:39:59,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:39:59,629 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:59,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:39:59,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:59,648 INFO L87 Difference]: Start difference. First operand 750 states. Second operand 2 states. [2019-11-07 00:39:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:59,725 INFO L93 Difference]: Finished difference Result 633 states and 1010 transitions. [2019-11-07 00:39:59,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:39:59,727 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 164 [2019-11-07 00:39:59,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:59,773 INFO L225 Difference]: With dead ends: 633 [2019-11-07 00:39:59,774 INFO L226 Difference]: Without dead ends: 596 [2019-11-07 00:39:59,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 329 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 00:39:59,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-11-07 00:39:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2019-11-07 00:39:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2019-11-07 00:39:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 955 transitions. [2019-11-07 00:39:59,901 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 955 transitions. Word has length 164 [2019-11-07 00:39:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:59,906 INFO L462 AbstractCegarLoop]: Abstraction has 596 states and 955 transitions. [2019-11-07 00:39:59,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:39:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 955 transitions. [2019-11-07 00:39:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-07 00:39:59,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:59,922 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:00,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:00,131 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:00,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:00,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1543512037, now seen corresponding path program 1 times [2019-11-07 00:40:00,132 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:00,132 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092085692] [2019-11-07 00:40:00,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:00,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092085692] [2019-11-07 00:40:00,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995828230] [2019-11-07 00:40:00,465 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 00:40:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:01,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 3259 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:01,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 00:40:01,168 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:40:01,481 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:01,482 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-11-07 00:40:01,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126655780] [2019-11-07 00:40:01,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:40:01,484 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:01,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:40:01,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:40:01,485 INFO L87 Difference]: Start difference. First operand 596 states and 955 transitions. Second operand 3 states. [2019-11-07 00:40:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:01,645 INFO L93 Difference]: Finished difference Result 1565 states and 2548 transitions. [2019-11-07 00:40:01,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:40:01,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2019-11-07 00:40:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:01,663 INFO L225 Difference]: With dead ends: 1565 [2019-11-07 00:40:01,663 INFO L226 Difference]: Without dead ends: 1078 [2019-11-07 00:40:01,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:40:01,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2019-11-07 00:40:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1056. [2019-11-07 00:40:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2019-11-07 00:40:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1715 transitions. [2019-11-07 00:40:01,764 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1715 transitions. Word has length 166 [2019-11-07 00:40:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:01,765 INFO L462 AbstractCegarLoop]: Abstraction has 1056 states and 1715 transitions. [2019-11-07 00:40:01,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:40:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1715 transitions. [2019-11-07 00:40:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-07 00:40:01,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:01,774 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:01,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:01,985 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:01,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:01,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2049855385, now seen corresponding path program 1 times [2019-11-07 00:40:01,985 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:01,986 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436155876] [2019-11-07 00:40:01,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:02,140 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436155876] [2019-11-07 00:40:02,140 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608101741] [2019-11-07 00:40:02,141 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 00:40:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:02,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 3260 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:02,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:02,819 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:03,103 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:03,103 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:03,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030323278] [2019-11-07 00:40:03,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:03,104 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:03,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:03,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:03,105 INFO L87 Difference]: Start difference. First operand 1056 states and 1715 transitions. Second operand 4 states. [2019-11-07 00:40:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:03,206 INFO L93 Difference]: Finished difference Result 2084 states and 3403 transitions. [2019-11-07 00:40:03,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:03,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-11-07 00:40:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:03,218 INFO L225 Difference]: With dead ends: 2084 [2019-11-07 00:40:03,218 INFO L226 Difference]: Without dead ends: 1056 [2019-11-07 00:40:03,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 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 00:40:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2019-11-07 00:40:03,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1056. [2019-11-07 00:40:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2019-11-07 00:40:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1714 transitions. [2019-11-07 00:40:03,298 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1714 transitions. Word has length 166 [2019-11-07 00:40:03,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:03,298 INFO L462 AbstractCegarLoop]: Abstraction has 1056 states and 1714 transitions. [2019-11-07 00:40:03,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:03,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1714 transitions. [2019-11-07 00:40:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-07 00:40:03,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:03,307 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:03,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:03,523 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:03,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:03,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1271242485, now seen corresponding path program 1 times [2019-11-07 00:40:03,525 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:03,526 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078244480] [2019-11-07 00:40:03,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:03,813 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078244480] [2019-11-07 00:40:03,814 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810017165] [2019-11-07 00:40:03,814 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 00:40:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:04,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 3262 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:04,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:04,761 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:05,063 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-11-07 00:40:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:05,273 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:05,273 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:05,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747073677] [2019-11-07 00:40:05,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:05,274 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:05,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:05,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:05,275 INFO L87 Difference]: Start difference. First operand 1056 states and 1714 transitions. Second operand 4 states. [2019-11-07 00:40:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:05,362 INFO L93 Difference]: Finished difference Result 2084 states and 3401 transitions. [2019-11-07 00:40:05,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:05,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-11-07 00:40:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:05,373 INFO L225 Difference]: With dead ends: 2084 [2019-11-07 00:40:05,373 INFO L226 Difference]: Without dead ends: 1056 [2019-11-07 00:40:05,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2019-11-07 00:40:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1056. [2019-11-07 00:40:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2019-11-07 00:40:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1713 transitions. [2019-11-07 00:40:05,428 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1713 transitions. Word has length 168 [2019-11-07 00:40:05,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:05,429 INFO L462 AbstractCegarLoop]: Abstraction has 1056 states and 1713 transitions. [2019-11-07 00:40:05,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1713 transitions. [2019-11-07 00:40:05,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:40:05,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:05,435 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:05,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:05,651 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:05,652 INFO L82 PathProgramCache]: Analyzing trace with hash -618683487, now seen corresponding path program 1 times [2019-11-07 00:40:05,652 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:05,653 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760625459] [2019-11-07 00:40:05,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:05,807 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760625459] [2019-11-07 00:40:05,807 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959488628] [2019-11-07 00:40:05,807 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 00:40:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:06,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 3264 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:06,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:06,749 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:07,020 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:07,021 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:07,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230215697] [2019-11-07 00:40:07,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:07,027 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:07,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:07,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:07,028 INFO L87 Difference]: Start difference. First operand 1056 states and 1713 transitions. Second operand 4 states. [2019-11-07 00:40:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:07,126 INFO L93 Difference]: Finished difference Result 2091 states and 3408 transitions. [2019-11-07 00:40:07,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:07,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-11-07 00:40:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:07,137 INFO L225 Difference]: With dead ends: 2091 [2019-11-07 00:40:07,138 INFO L226 Difference]: Without dead ends: 1065 [2019-11-07 00:40:07,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-11-07 00:40:07,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-11-07 00:40:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-11-07 00:40:07,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1725 transitions. [2019-11-07 00:40:07,187 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1725 transitions. Word has length 170 [2019-11-07 00:40:07,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:07,188 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1725 transitions. [2019-11-07 00:40:07,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1725 transitions. [2019-11-07 00:40:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-07 00:40:07,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:07,193 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:07,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:07,409 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:07,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:07,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1482424208, now seen corresponding path program 1 times [2019-11-07 00:40:07,410 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:07,411 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216184027] [2019-11-07 00:40:07,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:07,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216184027] [2019-11-07 00:40:07,585 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156572453] [2019-11-07 00:40:07,585 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 00:40:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:08,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 3265 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:08,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:08,345 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:08,653 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:08,653 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:08,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881277848] [2019-11-07 00:40:08,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:08,657 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:08,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:08,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:08,658 INFO L87 Difference]: Start difference. First operand 1065 states and 1725 transitions. Second operand 4 states. [2019-11-07 00:40:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:08,769 INFO L93 Difference]: Finished difference Result 2093 states and 3409 transitions. [2019-11-07 00:40:08,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:08,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-11-07 00:40:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:08,783 INFO L225 Difference]: With dead ends: 2093 [2019-11-07 00:40:08,784 INFO L226 Difference]: Without dead ends: 1065 [2019-11-07 00:40:08,792 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-11-07 00:40:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-11-07 00:40:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-11-07 00:40:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1724 transitions. [2019-11-07 00:40:08,852 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1724 transitions. Word has length 171 [2019-11-07 00:40:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:08,852 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1724 transitions. [2019-11-07 00:40:08,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1724 transitions. [2019-11-07 00:40:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-07 00:40:08,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:08,861 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:09,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:09,072 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:09,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:09,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1945680261, now seen corresponding path program 1 times [2019-11-07 00:40:09,072 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:09,073 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493084459] [2019-11-07 00:40:09,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:09,205 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493084459] [2019-11-07 00:40:09,205 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034500603] [2019-11-07 00:40:09,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:10,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 3266 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:10,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:10,055 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:10,298 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:10,299 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:40:10,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634704729] [2019-11-07 00:40:10,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:10,300 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:10,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:10,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:40:10,301 INFO L87 Difference]: Start difference. First operand 1065 states and 1724 transitions. Second operand 4 states. [2019-11-07 00:40:10,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:10,392 INFO L93 Difference]: Finished difference Result 2093 states and 3408 transitions. [2019-11-07 00:40:10,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:10,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-11-07 00:40:10,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:10,402 INFO L225 Difference]: With dead ends: 2093 [2019-11-07 00:40:10,402 INFO L226 Difference]: Without dead ends: 1065 [2019-11-07 00:40:10,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 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 00:40:10,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-11-07 00:40:10,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-11-07 00:40:10,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-11-07 00:40:10,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1723 transitions. [2019-11-07 00:40:10,450 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1723 transitions. Word has length 172 [2019-11-07 00:40:10,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:10,450 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1723 transitions. [2019-11-07 00:40:10,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:10,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1723 transitions. [2019-11-07 00:40:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-07 00:40:10,455 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:10,455 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:10,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:10,671 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:10,672 INFO L82 PathProgramCache]: Analyzing trace with hash 982032148, now seen corresponding path program 1 times [2019-11-07 00:40:10,673 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:10,673 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038117100] [2019-11-07 00:40:10,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:10,858 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038117100] [2019-11-07 00:40:10,858 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873963325] [2019-11-07 00:40:10,858 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 00:40:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:11,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:11,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:11,667 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:11,916 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:11,916 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:40:11,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687459026] [2019-11-07 00:40:11,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:11,917 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:11,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:11,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:11,918 INFO L87 Difference]: Start difference. First operand 1065 states and 1723 transitions. Second operand 4 states. [2019-11-07 00:40:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:12,093 INFO L93 Difference]: Finished difference Result 2092 states and 3408 transitions. [2019-11-07 00:40:12,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:12,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-11-07 00:40:12,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:12,102 INFO L225 Difference]: With dead ends: 2092 [2019-11-07 00:40:12,102 INFO L226 Difference]: Without dead ends: 1065 [2019-11-07 00:40:12,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:40:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-11-07 00:40:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-11-07 00:40:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-11-07 00:40:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1718 transitions. [2019-11-07 00:40:12,154 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1718 transitions. Word has length 173 [2019-11-07 00:40:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:12,155 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1718 transitions. [2019-11-07 00:40:12,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1718 transitions. [2019-11-07 00:40:12,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-07 00:40:12,160 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:12,161 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:12,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:12,375 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:12,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1458586870, now seen corresponding path program 1 times [2019-11-07 00:40:12,376 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:12,376 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024423243] [2019-11-07 00:40:12,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:12,566 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024423243] [2019-11-07 00:40:12,566 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432042144] [2019-11-07 00:40:12,567 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 00:40:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:13,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 3269 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:13,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:13,285 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:13,628 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:13,628 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:40:13,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469296591] [2019-11-07 00:40:13,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:13,629 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:13,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:13,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:13,630 INFO L87 Difference]: Start difference. First operand 1065 states and 1718 transitions. Second operand 4 states. [2019-11-07 00:40:13,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:13,842 INFO L93 Difference]: Finished difference Result 2092 states and 3398 transitions. [2019-11-07 00:40:13,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:13,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-11-07 00:40:13,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:13,851 INFO L225 Difference]: With dead ends: 2092 [2019-11-07 00:40:13,851 INFO L226 Difference]: Without dead ends: 1065 [2019-11-07 00:40:13,857 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:40:13,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-11-07 00:40:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-11-07 00:40:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-11-07 00:40:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1713 transitions. [2019-11-07 00:40:13,895 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1713 transitions. Word has length 175 [2019-11-07 00:40:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:13,895 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1713 transitions. [2019-11-07 00:40:13,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1713 transitions. [2019-11-07 00:40:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-07 00:40:13,900 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:13,901 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:14,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:14,117 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:14,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1544496906, now seen corresponding path program 1 times [2019-11-07 00:40:14,118 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:14,118 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413784121] [2019-11-07 00:40:14,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:14,292 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413784121] [2019-11-07 00:40:14,292 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491185188] [2019-11-07 00:40:14,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:15,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 3271 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:15,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:15,130 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:15,443 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:15,443 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:40:15,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779837009] [2019-11-07 00:40:15,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:15,444 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:15,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:15,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:15,445 INFO L87 Difference]: Start difference. First operand 1065 states and 1713 transitions. Second operand 4 states. [2019-11-07 00:40:15,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:15,727 INFO L93 Difference]: Finished difference Result 2128 states and 3447 transitions. [2019-11-07 00:40:15,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:15,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-11-07 00:40:15,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:15,743 INFO L225 Difference]: With dead ends: 2128 [2019-11-07 00:40:15,743 INFO L226 Difference]: Without dead ends: 1104 [2019-11-07 00:40:15,749 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:40:15,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2019-11-07 00:40:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1104. [2019-11-07 00:40:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1104 states. [2019-11-07 00:40:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1777 transitions. [2019-11-07 00:40:15,810 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1777 transitions. Word has length 177 [2019-11-07 00:40:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:15,811 INFO L462 AbstractCegarLoop]: Abstraction has 1104 states and 1777 transitions. [2019-11-07 00:40:15,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1777 transitions. [2019-11-07 00:40:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-07 00:40:15,819 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:15,819 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:16,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:16,028 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:16,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:16,028 INFO L82 PathProgramCache]: Analyzing trace with hash 488245515, now seen corresponding path program 1 times [2019-11-07 00:40:16,029 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:16,029 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104664562] [2019-11-07 00:40:16,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:16,201 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104664562] [2019-11-07 00:40:16,201 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877447519] [2019-11-07 00:40:16,202 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 00:40:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:16,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 3272 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:16,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:17,031 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:17,316 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:17,316 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:40:17,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035445402] [2019-11-07 00:40:17,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:17,317 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:17,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:17,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:17,317 INFO L87 Difference]: Start difference. First operand 1104 states and 1777 transitions. Second operand 4 states. [2019-11-07 00:40:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:17,521 INFO L93 Difference]: Finished difference Result 2131 states and 3450 transitions. [2019-11-07 00:40:17,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:17,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-11-07 00:40:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:17,530 INFO L225 Difference]: With dead ends: 2131 [2019-11-07 00:40:17,530 INFO L226 Difference]: Without dead ends: 1104 [2019-11-07 00:40:17,536 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:40:17,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2019-11-07 00:40:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1104. [2019-11-07 00:40:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1104 states. [2019-11-07 00:40:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1772 transitions. [2019-11-07 00:40:17,575 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1772 transitions. Word has length 178 [2019-11-07 00:40:17,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:17,575 INFO L462 AbstractCegarLoop]: Abstraction has 1104 states and 1772 transitions. [2019-11-07 00:40:17,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:17,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1772 transitions. [2019-11-07 00:40:17,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-07 00:40:17,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:17,581 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:17,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:17,789 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:17,790 INFO L82 PathProgramCache]: Analyzing trace with hash -293802614, now seen corresponding path program 1 times [2019-11-07 00:40:17,790 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:17,790 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923625218] [2019-11-07 00:40:17,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:17,942 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923625218] [2019-11-07 00:40:17,942 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259473985] [2019-11-07 00:40:17,942 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 00:40:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:18,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 3268 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:18,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:18,915 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:19,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 00:40:19,468 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:19,469 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-11-07 00:40:19,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788167055] [2019-11-07 00:40:19,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:40:19,470 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:19,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:40:19,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:19,470 INFO L87 Difference]: Start difference. First operand 1104 states and 1772 transitions. Second operand 9 states. [2019-11-07 00:40:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:19,715 INFO L93 Difference]: Finished difference Result 2144 states and 3464 transitions. [2019-11-07 00:40:19,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:40:19,716 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-11-07 00:40:19,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:19,723 INFO L225 Difference]: With dead ends: 2144 [2019-11-07 00:40:19,723 INFO L226 Difference]: Without dead ends: 1120 [2019-11-07 00:40:19,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 341 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 00:40:19,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-11-07 00:40:19,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1113. [2019-11-07 00:40:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1113 states. [2019-11-07 00:40:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1785 transitions. [2019-11-07 00:40:19,778 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1785 transitions. Word has length 178 [2019-11-07 00:40:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:19,779 INFO L462 AbstractCegarLoop]: Abstraction has 1113 states and 1785 transitions. [2019-11-07 00:40:19,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:40:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1785 transitions. [2019-11-07 00:40:19,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-07 00:40:19,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:19,783 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:19,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:19,991 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:19,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash 892032838, now seen corresponding path program 1 times [2019-11-07 00:40:19,992 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:19,993 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398836590] [2019-11-07 00:40:19,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:40:20,120 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398836590] [2019-11-07 00:40:20,121 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280798422] [2019-11-07 00:40:20,121 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 00:40:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:21,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 3272 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:21,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:21,105 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:21,365 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:21,365 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:40:21,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484664643] [2019-11-07 00:40:21,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:21,366 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:21,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:21,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:40:21,366 INFO L87 Difference]: Start difference. First operand 1113 states and 1785 transitions. Second operand 4 states. [2019-11-07 00:40:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:21,551 INFO L93 Difference]: Finished difference Result 2145 states and 3467 transitions. [2019-11-07 00:40:21,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:21,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2019-11-07 00:40:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:21,559 INFO L225 Difference]: With dead ends: 2145 [2019-11-07 00:40:21,559 INFO L226 Difference]: Without dead ends: 1113 [2019-11-07 00:40:21,564 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 354 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 00:40:21,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2019-11-07 00:40:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1113. [2019-11-07 00:40:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1113 states. [2019-11-07 00:40:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1780 transitions. [2019-11-07 00:40:21,603 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1780 transitions. Word has length 179 [2019-11-07 00:40:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:21,603 INFO L462 AbstractCegarLoop]: Abstraction has 1113 states and 1780 transitions. [2019-11-07 00:40:21,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1780 transitions. [2019-11-07 00:40:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-07 00:40:21,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:21,609 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:21,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:21,826 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:21,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:21,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1583466281, now seen corresponding path program 1 times [2019-11-07 00:40:21,827 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:21,827 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428336191] [2019-11-07 00:40:21,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:21,925 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428336191] [2019-11-07 00:40:21,925 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792585303] [2019-11-07 00:40:21,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:22,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:22,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:22,759 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:23,144 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:23,144 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:40:23,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503402148] [2019-11-07 00:40:23,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:40:23,146 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:23,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:40:23,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:40:23,146 INFO L87 Difference]: Start difference. First operand 1113 states and 1780 transitions. Second operand 11 states. [2019-11-07 00:40:23,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:23,312 INFO L93 Difference]: Finished difference Result 2082 states and 3361 transitions. [2019-11-07 00:40:23,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:40:23,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 178 [2019-11-07 00:40:23,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:23,322 INFO L225 Difference]: With dead ends: 2082 [2019-11-07 00:40:23,322 INFO L226 Difference]: Without dead ends: 1130 [2019-11-07 00:40:23,326 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 347 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2019-11-07 00:40:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1120. [2019-11-07 00:40:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2019-11-07 00:40:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1790 transitions. [2019-11-07 00:40:23,370 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1790 transitions. Word has length 178 [2019-11-07 00:40:23,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:23,372 INFO L462 AbstractCegarLoop]: Abstraction has 1120 states and 1790 transitions. [2019-11-07 00:40:23,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:40:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1790 transitions. [2019-11-07 00:40:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-07 00:40:23,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:23,430 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:23,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:23,632 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:23,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:23,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1256046255, now seen corresponding path program 1 times [2019-11-07 00:40:23,633 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:23,633 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842169517] [2019-11-07 00:40:23,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:23,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842169517] [2019-11-07 00:40:23,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477772834] [2019-11-07 00:40:23,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:24,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 3274 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:24,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:24,628 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:25,018 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:25,019 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-11-07 00:40:25,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589424403] [2019-11-07 00:40:25,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:40:25,020 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:25,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:40:25,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:25,020 INFO L87 Difference]: Start difference. First operand 1120 states and 1790 transitions. Second operand 8 states. [2019-11-07 00:40:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:25,127 INFO L93 Difference]: Finished difference Result 2086 states and 3370 transitions. [2019-11-07 00:40:25,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:25,128 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 181 [2019-11-07 00:40:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:25,135 INFO L225 Difference]: With dead ends: 2086 [2019-11-07 00:40:25,135 INFO L226 Difference]: Without dead ends: 1134 [2019-11-07 00:40:25,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 353 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2019-11-07 00:40:25,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1127. [2019-11-07 00:40:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1127 states. [2019-11-07 00:40:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1801 transitions. [2019-11-07 00:40:25,190 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1801 transitions. Word has length 181 [2019-11-07 00:40:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:25,191 INFO L462 AbstractCegarLoop]: Abstraction has 1127 states and 1801 transitions. [2019-11-07 00:40:25,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:40:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1801 transitions. [2019-11-07 00:40:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-07 00:40:25,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:25,196 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:25,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:25,410 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:25,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:25,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1009108085, now seen corresponding path program 1 times [2019-11-07 00:40:25,411 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:25,411 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16005403] [2019-11-07 00:40:25,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:40:25,533 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16005403] [2019-11-07 00:40:25,533 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710875595] [2019-11-07 00:40:25,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:26,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 3264 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:26,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 00:40:26,499 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:26,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 00:40:27,042 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:27,042 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-11-07 00:40:27,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015914442] [2019-11-07 00:40:27,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 00:40:27,044 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:27,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 00:40:27,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:27,045 INFO L87 Difference]: Start difference. First operand 1127 states and 1801 transitions. Second operand 14 states.