/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_spec2_product27.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:42:29,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:42:29,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:42:29,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:42:29,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:42:29,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:42:29,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:42:29,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:42:29,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:42:29,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:42:29,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:42:29,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:42:29,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:42:29,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:42:29,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:42:29,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:42:29,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:42:29,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:42:29,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:42:29,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:42:29,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:42:29,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:42:29,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:42:29,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:42:29,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:42:29,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:42:29,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:42:29,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:42:29,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:42:29,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:42:29,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:42:29,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:42:29,860 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:42:29,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:42:29,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:42:29,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:42:29,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:42:29,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:42:29,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:42:29,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:42:29,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:42:29,875 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 00:42:29,904 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:42:29,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:42:29,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:42:29,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:42:29,907 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:42:29,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:42:29,908 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:42:29,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:42:29,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:42:29,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:42:29,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:42:29,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:42:29,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:42:29,910 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:42:29,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:42:29,911 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:42:29,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:42:29,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:42:29,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:42:29,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:42:29,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:42:29,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:42:29,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:42:29,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:42:29,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:42:29,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:42:29,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:42:29,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:42:29,914 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 00:42:30,201 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:42:30,215 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:42:30,219 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:42:30,220 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:42:30,221 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:42:30,222 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product27.cil.c [2019-11-07 00:42:30,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e73922497/ba1fc3bac0fd4321b09b48bda0f05646/FLAG22682897c [2019-11-07 00:42:30,934 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:42:30,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product27.cil.c [2019-11-07 00:42:30,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e73922497/ba1fc3bac0fd4321b09b48bda0f05646/FLAG22682897c [2019-11-07 00:42:31,147 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e73922497/ba1fc3bac0fd4321b09b48bda0f05646 [2019-11-07 00:42:31,155 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:42:31,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:42:31,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:42:31,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:42:31,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:42:31,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:42:31" (1/1) ... [2019-11-07 00:42:31,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60be0f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:31, skipping insertion in model container [2019-11-07 00:42:31,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:42:31" (1/1) ... [2019-11-07 00:42:31,173 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:42:31,252 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:42:31,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:42:32,012 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:42:32,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:42:32,244 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:42:32,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:32 WrapperNode [2019-11-07 00:42:32,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:42:32,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:42:32,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:42:32,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:42:32,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:32" (1/1) ... [2019-11-07 00:42:32,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:32" (1/1) ... [2019-11-07 00:42:32,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:32" (1/1) ... [2019-11-07 00:42:32,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:32" (1/1) ... [2019-11-07 00:42:32,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:32" (1/1) ... [2019-11-07 00:42:32,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:32" (1/1) ... [2019-11-07 00:42:32,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:32" (1/1) ... [2019-11-07 00:42:32,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:42:32,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:42:32,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:42:32,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:42:32,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:32" (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 00:42:32,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:42:32,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:42:32,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:42:32,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:42:32,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:42:32,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:42:32,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:42:32,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:42:32,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:42:32,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2019-11-07 00:42:32,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2019-11-07 00:42:32,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2019-11-07 00:42:32,535 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2019-11-07 00:42:32,535 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:42:32,535 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:42:32,535 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:42:32,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:42:32,536 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:42:32,536 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:42:32,536 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:42:32,536 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:42:32,537 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:42:32,537 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:42:32,537 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 00:42:32,537 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:42:32,538 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:42:32,538 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:42:32,538 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:42:32,538 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:42:32,538 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:42:32,538 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:42:32,539 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:42:32,539 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:42:32,539 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:42:32,539 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:42:32,539 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:42:32,539 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:42:32,540 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:42:32,540 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:42:32,540 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:42:32,540 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:42:32,540 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:42:32,541 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:42:32,541 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:42:32,541 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:42:32,541 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:42:32,541 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:42:32,541 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:42:32,542 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:42:32,542 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:42:32,542 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:42:32,542 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:42:32,542 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:42:32,543 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:42:32,543 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:42:32,543 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:42:32,543 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:42:32,543 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:42:32,544 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:42:32,544 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:42:32,544 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:42:32,544 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:42:32,544 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:42:32,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:42:32,545 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:42:32,545 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:42:32,545 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:42:32,545 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:42:32,546 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:42:32,546 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:42:32,546 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:42:32,546 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:42:32,546 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:42:32,546 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:42:32,547 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:42:32,547 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:42:32,547 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:42:32,547 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:42:32,547 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:42:32,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:42:32,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:42:32,548 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:42:32,548 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:42:32,548 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:42:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:42:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:42:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:42:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:42:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:42:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:42:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:42:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:42:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:42:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:42:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:42:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:42:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:42:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:42:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:42:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:42:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:42:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2019-11-07 00:42:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2019-11-07 00:42:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2019-11-07 00:42:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2019-11-07 00:42:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:42:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:42:32,553 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:42:32,553 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:42:32,553 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:42:32,553 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:42:32,553 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:42:32,553 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:42:32,554 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:42:32,554 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:42:32,554 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:42:32,554 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:42:32,554 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:42:32,554 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:42:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:42:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:42:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:42:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:42:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:42:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:42:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:42:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:42:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:42:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:42:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:42:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:42:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:42:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:42:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:42:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:42:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 00:42:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:42:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:42:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:42:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:42:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:42:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:42:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:42:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:42:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:42:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:42:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:42:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:42:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:42:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:42:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:42:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:42:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:42:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:42:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:42:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:42:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:42:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:42:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:42:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:42:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:42:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:42:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:42:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:42:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:42:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:42:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:42:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:42:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:42:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:42:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:42:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:42:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:42:34,832 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:42:34,832 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:42:34,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:42:34 BoogieIcfgContainer [2019-11-07 00:42:34,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:42:34,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:42:34,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:42:34,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:42:34,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:42:31" (1/3) ... [2019-11-07 00:42:34,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6f0b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:42:34, skipping insertion in model container [2019-11-07 00:42:34,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:32" (2/3) ... [2019-11-07 00:42:34,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6f0b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:42:34, skipping insertion in model container [2019-11-07 00:42:34,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:42:34" (3/3) ... [2019-11-07 00:42:34,842 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product27.cil.c [2019-11-07 00:42:34,852 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:42:34,861 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:42:34,873 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:42:34,906 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:42:34,906 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:42:34,906 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:42:34,906 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:42:34,907 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:42:34,907 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:42:34,907 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:42:34,907 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:42:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states. [2019-11-07 00:42:34,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 00:42:34,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:34,988 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:42:34,990 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:34,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1054134663, now seen corresponding path program 1 times [2019-11-07 00:42:35,003 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:35,004 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741310828] [2019-11-07 00:42:35,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:35,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741310828] [2019-11-07 00:42:35,695 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:35,696 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:42:35,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046047177] [2019-11-07 00:42:35,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:42:35,705 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:35,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:42:35,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:42:35,723 INFO L87 Difference]: Start difference. First operand 786 states. Second operand 4 states. [2019-11-07 00:42:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:35,954 INFO L93 Difference]: Finished difference Result 1235 states and 1989 transitions. [2019-11-07 00:42:35,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:42:35,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-11-07 00:42:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:35,990 INFO L225 Difference]: With dead ends: 1235 [2019-11-07 00:42:35,990 INFO L226 Difference]: Without dead ends: 626 [2019-11-07 00:42:36,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:42:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-07 00:42:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-07 00:42:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:42:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 996 transitions. [2019-11-07 00:42:36,133 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 996 transitions. Word has length 133 [2019-11-07 00:42:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:36,134 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 996 transitions. [2019-11-07 00:42:36,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:42:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 996 transitions. [2019-11-07 00:42:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-07 00:42:36,144 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:36,144 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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 00:42:36,145 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:36,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:36,146 INFO L82 PathProgramCache]: Analyzing trace with hash 545110777, now seen corresponding path program 1 times [2019-11-07 00:42:36,146 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:36,146 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949930672] [2019-11-07 00:42:36,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:36,373 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949930672] [2019-11-07 00:42:36,374 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:36,374 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:42:36,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782667094] [2019-11-07 00:42:36,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:42:36,377 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:42:36,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:42:36,378 INFO L87 Difference]: Start difference. First operand 626 states and 996 transitions. Second operand 4 states. [2019-11-07 00:42:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:36,447 INFO L93 Difference]: Finished difference Result 1215 states and 1950 transitions. [2019-11-07 00:42:36,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:42:36,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2019-11-07 00:42:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:36,453 INFO L225 Difference]: With dead ends: 1215 [2019-11-07 00:42:36,454 INFO L226 Difference]: Without dead ends: 626 [2019-11-07 00:42:36,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:42:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-07 00:42:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-07 00:42:36,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:42:36,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 995 transitions. [2019-11-07 00:42:36,495 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 995 transitions. Word has length 136 [2019-11-07 00:42:36,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:36,496 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 995 transitions. [2019-11-07 00:42:36,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:42:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 995 transitions. [2019-11-07 00:42:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-07 00:42:36,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:36,501 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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 00:42:36,502 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:36,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:36,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1596840266, now seen corresponding path program 1 times [2019-11-07 00:42:36,502 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:36,503 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177804014] [2019-11-07 00:42:36,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:36,689 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177804014] [2019-11-07 00:42:36,689 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:36,689 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:42:36,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818239253] [2019-11-07 00:42:36,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:42:36,691 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:42:36,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:42:36,692 INFO L87 Difference]: Start difference. First operand 626 states and 995 transitions. Second operand 4 states. [2019-11-07 00:42:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:36,763 INFO L93 Difference]: Finished difference Result 1215 states and 1949 transitions. [2019-11-07 00:42:36,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:42:36,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-11-07 00:42:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:36,770 INFO L225 Difference]: With dead ends: 1215 [2019-11-07 00:42:36,770 INFO L226 Difference]: Without dead ends: 626 [2019-11-07 00:42:36,773 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:42:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-07 00:42:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-07 00:42:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:42:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 994 transitions. [2019-11-07 00:42:36,809 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 994 transitions. Word has length 137 [2019-11-07 00:42:36,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:36,810 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 994 transitions. [2019-11-07 00:42:36,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:42:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 994 transitions. [2019-11-07 00:42:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-07 00:42:36,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:36,815 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:42:36,815 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:36,816 INFO L82 PathProgramCache]: Analyzing trace with hash -794225131, now seen corresponding path program 1 times [2019-11-07 00:42:36,816 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:36,816 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151610102] [2019-11-07 00:42:36,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:36,945 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151610102] [2019-11-07 00:42:36,946 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:36,946 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:42:36,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970439831] [2019-11-07 00:42:36,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:42:36,948 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:36,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:42:36,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:42:36,948 INFO L87 Difference]: Start difference. First operand 626 states and 994 transitions. Second operand 4 states. [2019-11-07 00:42:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:37,065 INFO L93 Difference]: Finished difference Result 1215 states and 1948 transitions. [2019-11-07 00:42:37,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:42:37,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-11-07 00:42:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:37,083 INFO L225 Difference]: With dead ends: 1215 [2019-11-07 00:42:37,084 INFO L226 Difference]: Without dead ends: 626 [2019-11-07 00:42:37,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:42:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-07 00:42:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-07 00:42:37,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:42:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 993 transitions. [2019-11-07 00:42:37,128 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 993 transitions. Word has length 138 [2019-11-07 00:42:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:37,130 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 993 transitions. [2019-11-07 00:42:37,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:42:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 993 transitions. [2019-11-07 00:42:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-07 00:42:37,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:37,140 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:42:37,140 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:37,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:37,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1095628306, now seen corresponding path program 1 times [2019-11-07 00:42:37,187 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:37,188 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392459092] [2019-11-07 00:42:37,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:37,328 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392459092] [2019-11-07 00:42:37,328 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:37,328 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:42:37,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936033696] [2019-11-07 00:42:37,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:42:37,329 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:37,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:42:37,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:42:37,330 INFO L87 Difference]: Start difference. First operand 626 states and 993 transitions. Second operand 4 states. [2019-11-07 00:42:37,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:37,390 INFO L93 Difference]: Finished difference Result 1215 states and 1947 transitions. [2019-11-07 00:42:37,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:42:37,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-11-07 00:42:37,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:37,396 INFO L225 Difference]: With dead ends: 1215 [2019-11-07 00:42:37,397 INFO L226 Difference]: Without dead ends: 626 [2019-11-07 00:42:37,400 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:42:37,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-07 00:42:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-07 00:42:37,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:42:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 992 transitions. [2019-11-07 00:42:37,429 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 992 transitions. Word has length 139 [2019-11-07 00:42:37,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:37,429 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 992 transitions. [2019-11-07 00:42:37,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:42:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 992 transitions. [2019-11-07 00:42:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:42:37,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:37,434 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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 00:42:37,434 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:37,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1964836559, now seen corresponding path program 1 times [2019-11-07 00:42:37,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:37,437 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576246217] [2019-11-07 00:42:37,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:37,628 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576246217] [2019-11-07 00:42:37,629 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:37,629 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-07 00:42:37,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870839171] [2019-11-07 00:42:37,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 00:42:37,630 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:37,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 00:42:37,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:42:37,634 INFO L87 Difference]: Start difference. First operand 626 states and 992 transitions. Second operand 10 states. [2019-11-07 00:42:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:37,796 INFO L93 Difference]: Finished difference Result 1173 states and 1867 transitions. [2019-11-07 00:42:37,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:42:37,796 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2019-11-07 00:42:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:37,801 INFO L225 Difference]: With dead ends: 1173 [2019-11-07 00:42:37,802 INFO L226 Difference]: Without dead ends: 635 [2019-11-07 00:42:37,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:42:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-11-07 00:42:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 633. [2019-11-07 00:42:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2019-11-07 00:42:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1001 transitions. [2019-11-07 00:42:37,882 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1001 transitions. Word has length 140 [2019-11-07 00:42:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:37,883 INFO L462 AbstractCegarLoop]: Abstraction has 633 states and 1001 transitions. [2019-11-07 00:42:37,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 00:42:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1001 transitions. [2019-11-07 00:42:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:42:37,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:37,890 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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 00:42:37,891 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:37,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1270189552, now seen corresponding path program 1 times [2019-11-07 00:42:37,891 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:37,892 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267829451] [2019-11-07 00:42:37,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:38,015 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267829451] [2019-11-07 00:42:38,016 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:38,016 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:42:38,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212134362] [2019-11-07 00:42:38,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:42:38,017 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:38,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:42:38,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:42:38,017 INFO L87 Difference]: Start difference. First operand 633 states and 1001 transitions. Second operand 4 states. [2019-11-07 00:42:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:38,080 INFO L93 Difference]: Finished difference Result 1221 states and 1953 transitions. [2019-11-07 00:42:38,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:42:38,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-11-07 00:42:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:38,087 INFO L225 Difference]: With dead ends: 1221 [2019-11-07 00:42:38,087 INFO L226 Difference]: Without dead ends: 620 [2019-11-07 00:42:38,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:42:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-11-07 00:42:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-11-07 00:42:38,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-07 00:42:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 978 transitions. [2019-11-07 00:42:38,114 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 978 transitions. Word has length 140 [2019-11-07 00:42:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:38,115 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 978 transitions. [2019-11-07 00:42:38,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:42:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 978 transitions. [2019-11-07 00:42:38,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 00:42:38,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:38,120 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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 00:42:38,120 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:38,121 INFO L82 PathProgramCache]: Analyzing trace with hash -730531008, now seen corresponding path program 1 times [2019-11-07 00:42:38,121 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:38,122 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659141663] [2019-11-07 00:42:38,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:38,274 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659141663] [2019-11-07 00:42:38,274 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:38,275 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:42:38,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902721286] [2019-11-07 00:42:38,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:42:38,276 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:38,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:42:38,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:42:38,276 INFO L87 Difference]: Start difference. First operand 620 states and 978 transitions. Second operand 6 states. [2019-11-07 00:42:38,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:38,489 INFO L93 Difference]: Finished difference Result 1161 states and 1845 transitions. [2019-11-07 00:42:38,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:42:38,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-11-07 00:42:38,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:38,496 INFO L225 Difference]: With dead ends: 1161 [2019-11-07 00:42:38,496 INFO L226 Difference]: Without dead ends: 620 [2019-11-07 00:42:38,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:42:38,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-11-07 00:42:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-11-07 00:42:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-07 00:42:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 974 transitions. [2019-11-07 00:42:38,529 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 974 transitions. Word has length 141 [2019-11-07 00:42:38,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:38,530 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 974 transitions. [2019-11-07 00:42:38,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:42:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 974 transitions. [2019-11-07 00:42:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:42:38,535 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:38,535 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:42:38,535 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:38,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:38,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1761880204, now seen corresponding path program 1 times [2019-11-07 00:42:38,536 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:38,536 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151635870] [2019-11-07 00:42:38,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:38,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151635870] [2019-11-07 00:42:38,721 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:38,721 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:42:38,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707320740] [2019-11-07 00:42:38,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:42:38,722 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:38,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:42:38,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:42:38,723 INFO L87 Difference]: Start difference. First operand 620 states and 974 transitions. Second operand 6 states. [2019-11-07 00:42:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:38,924 INFO L93 Difference]: Finished difference Result 1161 states and 1841 transitions. [2019-11-07 00:42:38,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:42:38,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-11-07 00:42:38,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:38,929 INFO L225 Difference]: With dead ends: 1161 [2019-11-07 00:42:38,929 INFO L226 Difference]: Without dead ends: 620 [2019-11-07 00:42:38,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:42:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-11-07 00:42:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-11-07 00:42:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-07 00:42:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 970 transitions. [2019-11-07 00:42:38,957 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 970 transitions. Word has length 142 [2019-11-07 00:42:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:38,958 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 970 transitions. [2019-11-07 00:42:38,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:42:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 970 transitions. [2019-11-07 00:42:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:42:38,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:38,962 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:42:38,962 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:38,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:38,963 INFO L82 PathProgramCache]: Analyzing trace with hash 333743557, now seen corresponding path program 1 times [2019-11-07 00:42:38,963 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:38,963 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784123122] [2019-11-07 00:42:38,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:39,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784123122] [2019-11-07 00:42:39,095 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:39,095 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:42:39,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161825811] [2019-11-07 00:42:39,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:42:39,096 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:39,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:42:39,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:42:39,097 INFO L87 Difference]: Start difference. First operand 620 states and 970 transitions. Second operand 6 states. [2019-11-07 00:42:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:39,277 INFO L93 Difference]: Finished difference Result 1161 states and 1837 transitions. [2019-11-07 00:42:39,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:42:39,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-11-07 00:42:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:39,283 INFO L225 Difference]: With dead ends: 1161 [2019-11-07 00:42:39,283 INFO L226 Difference]: Without dead ends: 620 [2019-11-07 00:42:39,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:42:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-11-07 00:42:39,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-11-07 00:42:39,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-07 00:42:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 966 transitions. [2019-11-07 00:42:39,316 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 966 transitions. Word has length 143 [2019-11-07 00:42:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:39,317 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 966 transitions. [2019-11-07 00:42:39,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:42:39,317 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 966 transitions. [2019-11-07 00:42:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:42:39,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:39,322 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:42:39,322 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:39,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1388216901, now seen corresponding path program 1 times [2019-11-07 00:42:39,323 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:39,323 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585599285] [2019-11-07 00:42:39,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:39,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585599285] [2019-11-07 00:42:39,464 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:39,464 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:42:39,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275884258] [2019-11-07 00:42:39,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:42:39,466 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:39,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:42:39,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:42:39,466 INFO L87 Difference]: Start difference. First operand 620 states and 966 transitions. Second operand 7 states. [2019-11-07 00:42:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:39,570 INFO L93 Difference]: Finished difference Result 1161 states and 1833 transitions. [2019-11-07 00:42:39,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:42:39,571 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-11-07 00:42:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:39,578 INFO L225 Difference]: With dead ends: 1161 [2019-11-07 00:42:39,578 INFO L226 Difference]: Without dead ends: 599 [2019-11-07 00:42:39,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:42:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-11-07 00:42:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2019-11-07 00:42:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-11-07 00:42:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 932 transitions. [2019-11-07 00:42:39,608 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 932 transitions. Word has length 143 [2019-11-07 00:42:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:39,609 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 932 transitions. [2019-11-07 00:42:39,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:42:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 932 transitions. [2019-11-07 00:42:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:42:39,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:39,615 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:42:39,615 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:39,616 INFO L82 PathProgramCache]: Analyzing trace with hash 581281177, now seen corresponding path program 1 times [2019-11-07 00:42:39,616 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:39,617 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625139927] [2019-11-07 00:42:39,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:39,794 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625139927] [2019-11-07 00:42:39,794 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:39,794 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:42:39,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136641009] [2019-11-07 00:42:39,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:42:39,795 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:39,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:42:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:42:39,796 INFO L87 Difference]: Start difference. First operand 599 states and 932 transitions. Second operand 6 states. [2019-11-07 00:42:39,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:39,889 INFO L93 Difference]: Finished difference Result 1140 states and 1799 transitions. [2019-11-07 00:42:39,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:42:39,890 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-11-07 00:42:39,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:39,894 INFO L225 Difference]: With dead ends: 1140 [2019-11-07 00:42:39,894 INFO L226 Difference]: Without dead ends: 599 [2019-11-07 00:42:39,897 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:42:39,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-11-07 00:42:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2019-11-07 00:42:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-11-07 00:42:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 931 transitions. [2019-11-07 00:42:39,916 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 931 transitions. Word has length 144 [2019-11-07 00:42:39,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:39,917 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 931 transitions. [2019-11-07 00:42:39,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:42:39,917 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 931 transitions. [2019-11-07 00:42:39,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 00:42:39,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:39,921 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:42:39,922 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:39,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:39,922 INFO L82 PathProgramCache]: Analyzing trace with hash -627276726, now seen corresponding path program 1 times [2019-11-07 00:42:39,922 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:39,923 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171378962] [2019-11-07 00:42:39,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:40,038 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171378962] [2019-11-07 00:42:40,038 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:40,038 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:42:40,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509752694] [2019-11-07 00:42:40,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:42:40,039 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:40,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:42:40,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:42:40,040 INFO L87 Difference]: Start difference. First operand 599 states and 931 transitions. Second operand 6 states. [2019-11-07 00:42:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:40,130 INFO L93 Difference]: Finished difference Result 1140 states and 1798 transitions. [2019-11-07 00:42:40,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:42:40,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-11-07 00:42:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:40,135 INFO L225 Difference]: With dead ends: 1140 [2019-11-07 00:42:40,135 INFO L226 Difference]: Without dead ends: 599 [2019-11-07 00:42:40,138 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:42:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-11-07 00:42:40,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2019-11-07 00:42:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-11-07 00:42:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 930 transitions. [2019-11-07 00:42:40,165 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 930 transitions. Word has length 145 [2019-11-07 00:42:40,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:40,165 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 930 transitions. [2019-11-07 00:42:40,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:42:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 930 transitions. [2019-11-07 00:42:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 00:42:40,170 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:40,170 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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 00:42:40,170 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:40,170 INFO L82 PathProgramCache]: Analyzing trace with hash 269844414, now seen corresponding path program 1 times [2019-11-07 00:42:40,171 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:40,171 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434648204] [2019-11-07 00:42:40,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:42:40,486 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434648204] [2019-11-07 00:42:40,487 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:42:40,487 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-07 00:42:40,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762322452] [2019-11-07 00:42:40,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-07 00:42:40,489 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:40,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-07 00:42:40,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:42:40,498 INFO L87 Difference]: Start difference. First operand 599 states and 930 transitions. Second operand 12 states. [2019-11-07 00:42:40,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:40,775 INFO L93 Difference]: Finished difference Result 1141 states and 1797 transitions. [2019-11-07 00:42:40,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 00:42:40,776 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2019-11-07 00:42:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:40,781 INFO L225 Difference]: With dead ends: 1141 [2019-11-07 00:42:40,781 INFO L226 Difference]: Without dead ends: 599 [2019-11-07 00:42:40,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:42:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-11-07 00:42:40,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2019-11-07 00:42:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-11-07 00:42:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 929 transitions. [2019-11-07 00:42:40,816 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 929 transitions. Word has length 146 [2019-11-07 00:42:40,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:40,818 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 929 transitions. [2019-11-07 00:42:40,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-07 00:42:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 929 transitions. [2019-11-07 00:42:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:42:40,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:40,823 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:42:40,823 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:40,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:40,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1889822343, now seen corresponding path program 1 times [2019-11-07 00:42:40,824 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:40,824 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761406714] [2019-11-07 00:42:40,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:42:40,969 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761406714] [2019-11-07 00:42:40,969 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116271022] [2019-11-07 00:42:40,969 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 00:42:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:41,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 2771 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:42:41,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:42:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:42:41,624 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:42:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:42:42,408 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:42:42,408 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-11-07 00:42:42,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048317605] [2019-11-07 00:42:42,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:42:42,411 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:42,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:42:42,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:42:42,411 INFO L87 Difference]: Start difference. First operand 599 states and 929 transitions. Second operand 5 states. [2019-11-07 00:42:43,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:43,290 INFO L93 Difference]: Finished difference Result 1140 states and 1822 transitions. [2019-11-07 00:42:43,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:42:43,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-11-07 00:42:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:43,296 INFO L225 Difference]: With dead ends: 1140 [2019-11-07 00:42:43,296 INFO L226 Difference]: Without dead ends: 607 [2019-11-07 00:42:43,305 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 281 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:42:43,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-11-07 00:42:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-11-07 00:42:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-11-07 00:42:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 942 transitions. [2019-11-07 00:42:43,334 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 942 transitions. Word has length 147 [2019-11-07 00:42:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:43,335 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 942 transitions. [2019-11-07 00:42:43,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:42:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 942 transitions. [2019-11-07 00:42:43,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 00:42:43,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:43,339 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:42:43,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:42:43,546 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:43,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2076963317, now seen corresponding path program 1 times [2019-11-07 00:42:43,547 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:43,548 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585740690] [2019-11-07 00:42:43,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:42:43,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585740690] [2019-11-07 00:42:43,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907005567] [2019-11-07 00:42:43,720 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 00:42:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:44,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 2773 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:42:44,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:42:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:42:44,363 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:42:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:42:45,011 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:42:45,011 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-11-07 00:42:45,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160507827] [2019-11-07 00:42:45,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:42:45,012 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:45,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:42:45,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:42:45,013 INFO L87 Difference]: Start difference. First operand 607 states and 942 transitions. Second operand 5 states. [2019-11-07 00:42:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:45,958 INFO L93 Difference]: Finished difference Result 1156 states and 1845 transitions. [2019-11-07 00:42:45,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:42:45,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2019-11-07 00:42:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:45,962 INFO L225 Difference]: With dead ends: 1156 [2019-11-07 00:42:45,962 INFO L226 Difference]: Without dead ends: 615 [2019-11-07 00:42:45,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 285 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:42:45,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2019-11-07 00:42:45,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 615. [2019-11-07 00:42:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2019-11-07 00:42:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 955 transitions. [2019-11-07 00:42:45,984 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 955 transitions. Word has length 149 [2019-11-07 00:42:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:45,984 INFO L462 AbstractCegarLoop]: Abstraction has 615 states and 955 transitions. [2019-11-07 00:42:45,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:42:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 955 transitions. [2019-11-07 00:42:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-07 00:42:45,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:45,989 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:42:46,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:42:46,204 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:46,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1312607033, now seen corresponding path program 1 times [2019-11-07 00:42:46,205 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:46,205 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104958356] [2019-11-07 00:42:46,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:42:46,336 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104958356] [2019-11-07 00:42:46,336 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558162579] [2019-11-07 00:42:46,336 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 00:42:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:46,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 2775 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:42:46,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:42:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:42:47,052 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:42:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:42:47,925 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:42:47,926 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-11-07 00:42:47,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200023528] [2019-11-07 00:42:47,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:42:47,927 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:47,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:42:47,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:42:47,928 INFO L87 Difference]: Start difference. First operand 615 states and 955 transitions. Second operand 5 states. [2019-11-07 00:42:49,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:49,134 INFO L93 Difference]: Finished difference Result 1172 states and 1868 transitions. [2019-11-07 00:42:49,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:42:49,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2019-11-07 00:42:49,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:49,139 INFO L225 Difference]: With dead ends: 1172 [2019-11-07 00:42:49,139 INFO L226 Difference]: Without dead ends: 623 [2019-11-07 00:42:49,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:42:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-11-07 00:42:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-11-07 00:42:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-11-07 00:42:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 968 transitions. [2019-11-07 00:42:49,164 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 968 transitions. Word has length 151 [2019-11-07 00:42:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:49,164 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 968 transitions. [2019-11-07 00:42:49,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:42:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 968 transitions. [2019-11-07 00:42:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:42:49,168 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:49,168 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:42:49,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:42:49,375 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:49,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:49,376 INFO L82 PathProgramCache]: Analyzing trace with hash -941872595, now seen corresponding path program 1 times [2019-11-07 00:42:49,376 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:49,376 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282519587] [2019-11-07 00:42:49,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:42:49,496 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282519587] [2019-11-07 00:42:49,497 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014734792] [2019-11-07 00:42:49,497 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 00:42:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:50,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:42:50,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:42:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:42:50,202 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:42:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:42:50,956 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:42:50,957 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 12 [2019-11-07 00:42:50,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003423601] [2019-11-07 00:42:50,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:42:50,958 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:50,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:42:50,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:42:50,958 INFO L87 Difference]: Start difference. First operand 623 states and 968 transitions. Second operand 5 states. [2019-11-07 00:42:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:51,840 INFO L93 Difference]: Finished difference Result 1188 states and 1891 transitions. [2019-11-07 00:42:51,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:42:51,841 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-11-07 00:42:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:51,845 INFO L225 Difference]: With dead ends: 1188 [2019-11-07 00:42:51,846 INFO L226 Difference]: Without dead ends: 631 [2019-11-07 00:42:51,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 293 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:42:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2019-11-07 00:42:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2019-11-07 00:42:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2019-11-07 00:42:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 981 transitions. [2019-11-07 00:42:51,869 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 981 transitions. Word has length 153 [2019-11-07 00:42:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:51,869 INFO L462 AbstractCegarLoop]: Abstraction has 631 states and 981 transitions. [2019-11-07 00:42:51,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:42:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 981 transitions. [2019-11-07 00:42:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-07 00:42:51,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:51,874 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:42:52,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:42:52,081 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:52,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:52,082 INFO L82 PathProgramCache]: Analyzing trace with hash 807721721, now seen corresponding path program 1 times [2019-11-07 00:42:52,082 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:52,082 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121401367] [2019-11-07 00:42:52,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:42:52,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121401367] [2019-11-07 00:42:52,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999845824] [2019-11-07 00:42:52,253 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 00:42:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:52,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 2779 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:42:52,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:42:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:42:52,976 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:42:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:42:53,253 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:42:53,253 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [11] total 18 [2019-11-07 00:42:53,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525720448] [2019-11-07 00:42:53,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:42:53,258 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:53,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:42:53,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:42:53,258 INFO L87 Difference]: Start difference. First operand 631 states and 981 transitions. Second operand 9 states. [2019-11-07 00:42:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:54,634 INFO L93 Difference]: Finished difference Result 676 states and 1041 transitions. [2019-11-07 00:42:54,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:42:54,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 155 [2019-11-07 00:42:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:54,641 INFO L225 Difference]: With dead ends: 676 [2019-11-07 00:42:54,641 INFO L226 Difference]: Without dead ends: 659 [2019-11-07 00:42:54,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 313 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2019-11-07 00:42:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2019-11-07 00:42:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 645. [2019-11-07 00:42:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-07 00:42:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1000 transitions. [2019-11-07 00:42:54,665 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1000 transitions. Word has length 155 [2019-11-07 00:42:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:54,667 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1000 transitions. [2019-11-07 00:42:54,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:42:54,668 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1000 transitions. [2019-11-07 00:42:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:42:54,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:54,672 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:42:54,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:42:54,887 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:54,888 INFO L82 PathProgramCache]: Analyzing trace with hash -208367116, now seen corresponding path program 1 times [2019-11-07 00:42:54,888 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:54,888 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60567480] [2019-11-07 00:42:54,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:42:55,047 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60567480] [2019-11-07 00:42:55,047 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025730093] [2019-11-07 00:42:55,047 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 00:42:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:55,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 2795 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:42:55,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:42:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:42:55,831 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:42:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:42:56,115 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:42:56,115 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [11] total 14 [2019-11-07 00:42:56,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644370443] [2019-11-07 00:42:56,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:42:56,116 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:56,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:42:56,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:42:56,117 INFO L87 Difference]: Start difference. First operand 645 states and 1000 transitions. Second operand 5 states. [2019-11-07 00:42:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:42:56,161 INFO L93 Difference]: Finished difference Result 662 states and 1020 transitions. [2019-11-07 00:42:56,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:42:56,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-11-07 00:42:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:42:56,166 INFO L225 Difference]: With dead ends: 662 [2019-11-07 00:42:56,166 INFO L226 Difference]: Without dead ends: 645 [2019-11-07 00:42:56,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 329 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:42:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-11-07 00:42:56,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-11-07 00:42:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-07 00:42:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 998 transitions. [2019-11-07 00:42:56,188 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 998 transitions. Word has length 161 [2019-11-07 00:42:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:42:56,189 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 998 transitions. [2019-11-07 00:42:56,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:42:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 998 transitions. [2019-11-07 00:42:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-07 00:42:56,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:42:56,194 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:42:56,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:42:56,402 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:42:56,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:42:56,403 INFO L82 PathProgramCache]: Analyzing trace with hash 107103986, now seen corresponding path program 1 times [2019-11-07 00:42:56,403 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:42:56,403 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545977688] [2019-11-07 00:42:56,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:42:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-07 00:42:56,576 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545977688] [2019-11-07 00:42:56,577 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90844713] [2019-11-07 00:42:56,577 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 00:42:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:42:57,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 2845 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 00:42:57,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:42:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:42:57,286 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:42:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:42:57,791 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:42:57,791 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [11] total 18 [2019-11-07 00:42:57,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473704854] [2019-11-07 00:42:57,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:42:57,792 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:42:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:42:57,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:42:57,792 INFO L87 Difference]: Start difference. First operand 645 states and 998 transitions. Second operand 9 states. [2019-11-07 00:43:02,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:02,907 INFO L93 Difference]: Finished difference Result 1888 states and 3004 transitions. [2019-11-07 00:43:02,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 00:43:02,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 179 [2019-11-07 00:43:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:02,917 INFO L225 Difference]: With dead ends: 1888 [2019-11-07 00:43:02,917 INFO L226 Difference]: Without dead ends: 1309 [2019-11-07 00:43:02,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2019-11-07 00:43:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2019-11-07 00:43:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1266. [2019-11-07 00:43:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1266 states. [2019-11-07 00:43:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 2003 transitions. [2019-11-07 00:43:02,974 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 2003 transitions. Word has length 179 [2019-11-07 00:43:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:02,974 INFO L462 AbstractCegarLoop]: Abstraction has 1266 states and 2003 transitions. [2019-11-07 00:43:02,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:43:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 2003 transitions. [2019-11-07 00:43:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-07 00:43:02,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:02,981 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:03,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:03,189 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:03,190 INFO L82 PathProgramCache]: Analyzing trace with hash -357695871, now seen corresponding path program 1 times [2019-11-07 00:43:03,190 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:03,191 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338437588] [2019-11-07 00:43:03,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-07 00:43:03,359 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338437588] [2019-11-07 00:43:03,359 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545209456] [2019-11-07 00:43:03,359 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 00:43:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:03,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 2862 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:03,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:43:04,020 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:43:04,332 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:04,332 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 00:43:04,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856889896] [2019-11-07 00:43:04,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:04,336 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:04,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:04,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:04,336 INFO L87 Difference]: Start difference. First operand 1266 states and 2003 transitions. Second operand 3 states. [2019-11-07 00:43:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:04,484 INFO L93 Difference]: Finished difference Result 3028 states and 4865 transitions. [2019-11-07 00:43:04,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:04,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2019-11-07 00:43:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:04,498 INFO L225 Difference]: With dead ends: 3028 [2019-11-07 00:43:04,499 INFO L226 Difference]: Without dead ends: 1839 [2019-11-07 00:43:04,504 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:04,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2019-11-07 00:43:04,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1264. [2019-11-07 00:43:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1264 states. [2019-11-07 00:43:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1995 transitions. [2019-11-07 00:43:04,596 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1995 transitions. Word has length 184 [2019-11-07 00:43:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:04,596 INFO L462 AbstractCegarLoop]: Abstraction has 1264 states and 1995 transitions. [2019-11-07 00:43:04,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1995 transitions. [2019-11-07 00:43:04,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-07 00:43:04,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:04,605 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]