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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec3_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 14:26:22,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 14:26:22,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 14:26:22,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 14:26:22,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 14:26:22,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 14:26:22,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 14:26:22,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 14:26:22,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 14:26:22,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 14:26:22,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 14:26:22,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 14:26:22,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 14:26:22,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 14:26:22,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 14:26:22,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 14:26:22,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 14:26:22,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 14:26:22,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 14:26:22,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 14:26:22,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 14:26:22,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 14:26:22,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 14:26:22,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 14:26:22,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 14:26:22,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 14:26:22,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 14:26:22,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 14:26:22,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 14:26:22,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 14:26:22,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 14:26:22,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 14:26:22,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 14:26:22,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 14:26:22,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 14:26:22,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 14:26:22,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 14:26:22,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 14:26:22,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 14:26:22,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 14:26:22,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 14:26:22,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 14:26:22,566 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 14:26:22,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 14:26:22,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 14:26:22,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 14:26:22,568 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 14:26:22,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 14:26:22,568 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 14:26:22,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 14:26:22,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 14:26:22,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 14:26:22,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 14:26:22,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 14:26:22,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 14:26:22,570 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 14:26:22,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 14:26:22,570 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 14:26:22,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 14:26:22,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 14:26:22,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 14:26:22,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 14:26:22,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 14:26:22,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 14:26:22,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 14:26:22,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 14:26:22,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 14:26:22,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 14:26:22,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 14:26:22,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 14:26:22,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 14:26:22,925 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 14:26:22,936 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 14:26:22,940 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 14:26:22,941 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 14:26:22,942 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 14:26:22,942 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product21.cil.c [2019-10-07 14:26:23,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5150fb3e/063ccbd1cf3c4b2a88e12b72daa4a676/FLAG03379da7f [2019-10-07 14:26:23,588 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 14:26:23,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product21.cil.c [2019-10-07 14:26:23,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5150fb3e/063ccbd1cf3c4b2a88e12b72daa4a676/FLAG03379da7f [2019-10-07 14:26:23,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5150fb3e/063ccbd1cf3c4b2a88e12b72daa4a676 [2019-10-07 14:26:23,800 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 14:26:23,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 14:26:23,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 14:26:23,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 14:26:23,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 14:26:23,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:26:23" (1/1) ... [2019-10-07 14:26:23,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@574a651b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:23, skipping insertion in model container [2019-10-07 14:26:23,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:26:23" (1/1) ... [2019-10-07 14:26:23,823 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 14:26:23,913 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 14:26:24,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 14:26:24,646 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 14:26:24,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 14:26:24,852 INFO L192 MainTranslator]: Completed translation [2019-10-07 14:26:24,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:24 WrapperNode [2019-10-07 14:26:24,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 14:26:24,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 14:26:24,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 14:26:24,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 14:26:24,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:24" (1/1) ... [2019-10-07 14:26:24,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:24" (1/1) ... [2019-10-07 14:26:24,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:24" (1/1) ... [2019-10-07 14:26:24,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:24" (1/1) ... [2019-10-07 14:26:24,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:24" (1/1) ... [2019-10-07 14:26:25,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:24" (1/1) ... [2019-10-07 14:26:25,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:24" (1/1) ... [2019-10-07 14:26:25,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 14:26:25,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 14:26:25,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 14:26:25,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 14:26:25,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 14:26:25,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 14:26:25,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 14:26:25,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-07 14:26:25,130 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-07 14:26:25,130 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-07 14:26:25,132 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-07 14:26:25,132 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-07 14:26:25,134 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-07 14:26:25,134 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-07 14:26:25,134 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-07 14:26:25,134 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-07 14:26:25,136 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-07 14:26:25,136 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-07 14:26:25,137 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-07 14:26:25,137 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-07 14:26:25,137 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-07 14:26:25,140 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-07 14:26:25,140 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-07 14:26:25,140 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-07 14:26:25,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 14:26:25,141 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-07 14:26:25,141 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-07 14:26:25,141 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-07 14:26:25,142 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-07 14:26:25,142 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-07 14:26:25,142 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-07 14:26:25,143 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-07 14:26:25,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-07 14:26:25,143 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-07 14:26:25,143 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-07 14:26:25,144 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-07 14:26:25,144 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-07 14:26:25,144 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-07 14:26:25,145 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-07 14:26:25,145 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-07 14:26:25,146 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-07 14:26:25,146 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-07 14:26:25,146 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-07 14:26:25,147 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-07 14:26:25,147 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-07 14:26:25,147 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-07 14:26:25,147 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-07 14:26:25,147 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-07 14:26:25,148 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-07 14:26:25,148 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-07 14:26:25,148 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-07 14:26:25,148 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-07 14:26:25,149 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-07 14:26:25,149 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-07 14:26:25,149 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-07 14:26:25,151 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-07 14:26:25,151 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-07 14:26:25,151 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-07 14:26:25,151 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-07 14:26:25,151 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-07 14:26:25,152 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-07 14:26:25,152 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-07 14:26:25,152 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-07 14:26:25,152 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-07 14:26:25,153 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-07 14:26:25,153 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-07 14:26:25,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-07 14:26:25,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-07 14:26:25,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-07 14:26:25,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-07 14:26:25,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-07 14:26:25,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-07 14:26:25,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-07 14:26:25,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-07 14:26:25,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-07 14:26:25,155 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-07 14:26:25,155 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-07 14:26:25,155 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-07 14:26:25,156 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-07 14:26:25,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 14:26:25,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 14:26:25,158 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 14:26:25,158 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-07 14:26:25,158 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-07 14:26:25,158 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-07 14:26:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-07 14:26:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-07 14:26:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-07 14:26:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-07 14:26:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-07 14:26:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-07 14:26:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-07 14:26:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-07 14:26:25,161 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-07 14:26:25,161 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-07 14:26:25,161 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-07 14:26:25,161 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-07 14:26:25,161 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-07 14:26:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-07 14:26:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-07 14:26:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-07 14:26:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-07 14:26:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-07 14:26:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-07 14:26:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-07 14:26:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-07 14:26:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-07 14:26:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-07 14:26:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-07 14:26:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 14:26:25,165 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-07 14:26:25,165 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-07 14:26:25,165 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-07 14:26:25,165 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-07 14:26:25,166 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-07 14:26:25,166 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-07 14:26:25,166 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-07 14:26:25,166 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-07 14:26:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-07 14:26:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-07 14:26:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-07 14:26:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-07 14:26:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-07 14:26:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-07 14:26:25,169 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-07 14:26:25,169 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-07 14:26:25,169 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-07 14:26:25,169 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-07 14:26:25,170 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-07 14:26:25,171 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-07 14:26:25,171 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-07 14:26:25,172 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-07 14:26:25,172 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-07 14:26:25,172 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-07 14:26:25,172 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-07 14:26:25,172 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-07 14:26:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-07 14:26:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-07 14:26:25,174 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-07 14:26:25,179 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-07 14:26:25,180 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-07 14:26:25,180 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-07 14:26:25,180 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-07 14:26:25,181 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-07 14:26:25,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 14:26:25,181 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-07 14:26:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-07 14:26:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-07 14:26:25,183 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-07 14:26:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 14:26:25,193 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 14:26:25,193 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-07 14:26:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 14:26:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 14:26:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 14:26:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 14:26:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-07 14:26:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 14:26:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-07 14:26:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-07 14:26:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 14:26:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-07 14:26:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-07 14:26:25,196 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-07 14:26:25,196 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-07 14:26:25,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 14:26:25,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-07 14:26:25,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 14:26:30,235 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 14:26:30,235 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-07 14:26:30,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:26:30 BoogieIcfgContainer [2019-10-07 14:26:30,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 14:26:30,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 14:26:30,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 14:26:30,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 14:26:30,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 02:26:23" (1/3) ... [2019-10-07 14:26:30,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f4f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:26:30, skipping insertion in model container [2019-10-07 14:26:30,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:24" (2/3) ... [2019-10-07 14:26:30,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f4f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:26:30, skipping insertion in model container [2019-10-07 14:26:30,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:26:30" (3/3) ... [2019-10-07 14:26:30,246 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product21.cil.c [2019-10-07 14:26:30,257 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 14:26:30,267 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 14:26:30,280 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 14:26:30,314 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 14:26:30,314 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 14:26:30,315 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 14:26:30,315 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 14:26:30,315 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 14:26:30,315 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 14:26:30,315 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 14:26:30,315 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 14:26:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states. [2019-10-07 14:26:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-07 14:26:30,369 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:30,371 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:26:30,373 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1849535445, now seen corresponding path program 1 times [2019-10-07 14:26:30,389 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:30,389 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:30,389 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:30,389 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-07 14:26:31,265 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:31,265 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:31,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 14:26:31,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:26:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:26:32,049 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:26:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:26:32,201 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:26:32,201 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-07 14:26:32,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:26:32,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:26:32,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:26:32,223 INFO L87 Difference]: Start difference. First operand 591 states. Second operand 3 states. [2019-10-07 14:26:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:32,468 INFO L93 Difference]: Finished difference Result 1295 states and 1980 transitions. [2019-10-07 14:26:32,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:26:32,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2019-10-07 14:26:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:32,502 INFO L225 Difference]: With dead ends: 1295 [2019-10-07 14:26:32,503 INFO L226 Difference]: Without dead ends: 836 [2019-10-07 14:26:32,516 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:26:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2019-10-07 14:26:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 823. [2019-10-07 14:26:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 823 states. [2019-10-07 14:26:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1242 transitions. [2019-10-07 14:26:32,726 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1242 transitions. Word has length 112 [2019-10-07 14:26:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:32,727 INFO L462 AbstractCegarLoop]: Abstraction has 823 states and 1242 transitions. [2019-10-07 14:26:32,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:26:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1242 transitions. [2019-10-07 14:26:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-07 14:26:32,744 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:32,745 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 14:26:32,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:32,957 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:32,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:32,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1890203850, now seen corresponding path program 1 times [2019-10-07 14:26:32,958 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:32,958 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:32,959 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:32,959 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 14:26:33,320 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:33,320 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:33,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 3013 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 14:26:33,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:26:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:26:34,050 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:26:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:26:34,226 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:26:34,227 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 10 [2019-10-07 14:26:34,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:26:34,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:26:34,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-07 14:26:34,229 INFO L87 Difference]: Start difference. First operand 823 states and 1242 transitions. Second operand 5 states. [2019-10-07 14:26:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:36,155 INFO L93 Difference]: Finished difference Result 3140 states and 4841 transitions. [2019-10-07 14:26:36,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:26:36,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2019-10-07 14:26:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:36,179 INFO L225 Difference]: With dead ends: 3140 [2019-10-07 14:26:36,179 INFO L226 Difference]: Without dead ends: 2348 [2019-10-07 14:26:36,190 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-07 14:26:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2019-10-07 14:26:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2298. [2019-10-07 14:26:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2298 states. [2019-10-07 14:26:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 3441 transitions. [2019-10-07 14:26:36,376 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 3441 transitions. Word has length 113 [2019-10-07 14:26:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:36,377 INFO L462 AbstractCegarLoop]: Abstraction has 2298 states and 3441 transitions. [2019-10-07 14:26:36,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:26:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 3441 transitions. [2019-10-07 14:26:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-07 14:26:36,387 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:36,387 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 14:26:36,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:36,595 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:36,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1610128671, now seen corresponding path program 1 times [2019-10-07 14:26:36,596 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:36,596 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:36,596 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:36,596 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 14:26:36,813 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:36,813 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:37,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 3029 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-07 14:26:37,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:26:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:26:37,524 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:26:37,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-07 14:26:37,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:26:37,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-07 14:26:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:26:37,915 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:26:37,916 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [7] total 16 [2019-10-07 14:26:37,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-07 14:26:37,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-07 14:26:37,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-10-07 14:26:37,917 INFO L87 Difference]: Start difference. First operand 2298 states and 3441 transitions. Second operand 11 states. [2019-10-07 14:26:39,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:39,554 INFO L93 Difference]: Finished difference Result 4335 states and 6542 transitions. [2019-10-07 14:26:39,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-07 14:26:39,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 117 [2019-10-07 14:26:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:39,576 INFO L225 Difference]: With dead ends: 4335 [2019-10-07 14:26:39,576 INFO L226 Difference]: Without dead ends: 2610 [2019-10-07 14:26:39,587 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 224 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2019-10-07 14:26:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2019-10-07 14:26:39,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 2482. [2019-10-07 14:26:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2482 states. [2019-10-07 14:26:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3693 transitions. [2019-10-07 14:26:39,785 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3693 transitions. Word has length 117 [2019-10-07 14:26:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:39,786 INFO L462 AbstractCegarLoop]: Abstraction has 2482 states and 3693 transitions. [2019-10-07 14:26:39,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-07 14:26:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3693 transitions. [2019-10-07 14:26:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-07 14:26:39,792 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:39,792 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 14:26:40,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:40,004 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:40,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:40,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1143572123, now seen corresponding path program 1 times [2019-10-07 14:26:40,005 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:40,005 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:40,005 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:40,006 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:40,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 14:26:40,307 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:40,307 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:40,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 3018 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-07 14:26:40,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:26:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:26:40,920 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:26:41,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:26:41,197 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-10-07 14:26:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:26:41,295 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:26:41,296 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 13 [2019-10-07 14:26:41,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-07 14:26:41,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-07 14:26:41,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-07 14:26:41,297 INFO L87 Difference]: Start difference. First operand 2482 states and 3693 transitions. Second operand 8 states. [2019-10-07 14:26:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:41,602 INFO L93 Difference]: Finished difference Result 4911 states and 7403 transitions. [2019-10-07 14:26:41,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:26:41,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 118 [2019-10-07 14:26:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:41,629 INFO L225 Difference]: With dead ends: 4911 [2019-10-07 14:26:41,630 INFO L226 Difference]: Without dead ends: 2970 [2019-10-07 14:26:41,645 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 229 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-07 14:26:41,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2019-10-07 14:26:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2970. [2019-10-07 14:26:41,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2970 states. [2019-10-07 14:26:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 4437 transitions. [2019-10-07 14:26:41,804 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 4437 transitions. Word has length 118 [2019-10-07 14:26:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:41,807 INFO L462 AbstractCegarLoop]: Abstraction has 2970 states and 4437 transitions. [2019-10-07 14:26:41,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-07 14:26:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 4437 transitions. [2019-10-07 14:26:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-07 14:26:41,813 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:41,813 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 14:26:42,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:42,030 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:42,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1846674351, now seen corresponding path program 1 times [2019-10-07 14:26:42,031 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:42,031 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:42,032 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:42,032 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 14:26:42,228 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:42,228 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:42,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 3028 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-07 14:26:42,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:26:43,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:26:43,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:26:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:26:43,102 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:26:43,281 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:26:43,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:26:43,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:26:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 14:26:43,539 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:26:43,539 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 10] total 23 [2019-10-07 14:26:43,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-07 14:26:43,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-07 14:26:43,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2019-10-07 14:26:43,542 INFO L87 Difference]: Start difference. First operand 2970 states and 4437 transitions. Second operand 10 states. [2019-10-07 14:26:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:49,022 INFO L93 Difference]: Finished difference Result 5251 states and 7920 transitions. [2019-10-07 14:26:49,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-07 14:26:49,023 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 120 [2019-10-07 14:26:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:49,071 INFO L225 Difference]: With dead ends: 5251 [2019-10-07 14:26:49,071 INFO L226 Difference]: Without dead ends: 5248 [2019-10-07 14:26:49,080 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2019-10-07 14:26:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2019-10-07 14:26:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 5151. [2019-10-07 14:26:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5151 states. [2019-10-07 14:26:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5151 states to 5151 states and 7790 transitions. [2019-10-07 14:26:49,412 INFO L78 Accepts]: Start accepts. Automaton has 5151 states and 7790 transitions. Word has length 120 [2019-10-07 14:26:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:49,414 INFO L462 AbstractCegarLoop]: Abstraction has 5151 states and 7790 transitions. [2019-10-07 14:26:49,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-07 14:26:49,414 INFO L276 IsEmpty]: Start isEmpty. Operand 5151 states and 7790 transitions. [2019-10-07 14:26:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-07 14:26:49,418 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:49,418 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 14:26:49,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:49,629 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash -673741192, now seen corresponding path program 1 times [2019-10-07 14:26:49,629 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:49,629 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:49,630 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:49,630 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-07 14:26:49,973 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:49,973 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:50,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 3019 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 14:26:50,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:26:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:26:50,811 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:26:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:26:50,949 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:26:50,949 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-07 14:26:50,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:26:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:26:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:26:50,952 INFO L87 Difference]: Start difference. First operand 5151 states and 7790 transitions. Second operand 3 states. [2019-10-07 14:26:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:51,288 INFO L93 Difference]: Finished difference Result 12729 states and 19578 transitions. [2019-10-07 14:26:51,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:26:51,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-07 14:26:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:51,351 INFO L225 Difference]: With dead ends: 12729 [2019-10-07 14:26:51,351 INFO L226 Difference]: Without dead ends: 7609 [2019-10-07 14:26:51,388 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:26:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7609 states. [2019-10-07 14:26:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7609 to 7464. [2019-10-07 14:26:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7464 states. [2019-10-07 14:26:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7464 states to 7464 states and 11282 transitions. [2019-10-07 14:26:51,962 INFO L78 Accepts]: Start accepts. Automaton has 7464 states and 11282 transitions. Word has length 121 [2019-10-07 14:26:51,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:51,963 INFO L462 AbstractCegarLoop]: Abstraction has 7464 states and 11282 transitions. [2019-10-07 14:26:51,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:26:51,963 INFO L276 IsEmpty]: Start isEmpty. Operand 7464 states and 11282 transitions. [2019-10-07 14:26:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-07 14:26:51,972 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:51,972 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 14:26:52,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:52,180 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1469350349, now seen corresponding path program 1 times [2019-10-07 14:26:52,182 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:52,182 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:52,182 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:52,182 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 14:26:52,391 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:52,391 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:52,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 3031 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-07 14:26:52,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:26:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:26:53,048 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:26:53,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:26:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 14:26:53,441 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:26:53,441 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 20 [2019-10-07 14:26:53,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 14:26:53,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 14:26:53,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-07 14:26:53,443 INFO L87 Difference]: Start difference. First operand 7464 states and 11282 transitions. Second operand 6 states. [2019-10-07 14:26:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:55,466 INFO L93 Difference]: Finished difference Result 14506 states and 21986 transitions. [2019-10-07 14:26:55,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 14:26:55,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-10-07 14:26:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:55,515 INFO L225 Difference]: With dead ends: 14506 [2019-10-07 14:26:55,515 INFO L226 Difference]: Without dead ends: 7073 [2019-10-07 14:26:55,554 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-07 14:26:55,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2019-10-07 14:26:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 7073. [2019-10-07 14:26:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7073 states. [2019-10-07 14:26:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7073 states to 7073 states and 10688 transitions. [2019-10-07 14:26:55,917 INFO L78 Accepts]: Start accepts. Automaton has 7073 states and 10688 transitions. Word has length 122 [2019-10-07 14:26:55,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:55,918 INFO L462 AbstractCegarLoop]: Abstraction has 7073 states and 10688 transitions. [2019-10-07 14:26:55,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 14:26:55,918 INFO L276 IsEmpty]: Start isEmpty. Operand 7073 states and 10688 transitions. [2019-10-07 14:26:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-07 14:26:55,923 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:55,924 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:26:56,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:56,132 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:56,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1407780026, now seen corresponding path program 1 times [2019-10-07 14:26:56,133 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:56,133 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:56,134 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:56,134 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-07 14:26:56,451 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:56,451 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:57,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 3143 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-07 14:26:57,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:26:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:26:57,198 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:26:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-07 14:26:57,458 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:26:57,459 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 12 [2019-10-07 14:26:57,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:26:57,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:26:57,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:26:57,460 INFO L87 Difference]: Start difference. First operand 7073 states and 10688 transitions. Second operand 7 states. [2019-10-07 14:26:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:57,806 INFO L93 Difference]: Finished difference Result 13817 states and 21239 transitions. [2019-10-07 14:26:57,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:26:57,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2019-10-07 14:26:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:57,867 INFO L225 Difference]: With dead ends: 13817 [2019-10-07 14:26:57,867 INFO L226 Difference]: Without dead ends: 7304 [2019-10-07 14:26:57,897 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 301 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:26:57,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7304 states. [2019-10-07 14:26:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7304 to 7230. [2019-10-07 14:26:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7230 states. [2019-10-07 14:26:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 11047 transitions. [2019-10-07 14:26:58,391 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 11047 transitions. Word has length 154 [2019-10-07 14:26:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:58,395 INFO L462 AbstractCegarLoop]: Abstraction has 7230 states and 11047 transitions. [2019-10-07 14:26:58,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:26:58,396 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 11047 transitions. [2019-10-07 14:26:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-07 14:26:58,401 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:58,401 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:26:58,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:58,610 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:58,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:58,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1902373067, now seen corresponding path program 1 times [2019-10-07 14:26:58,611 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:58,611 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:58,611 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:58,612 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-07 14:26:58,770 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:58,770 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:59,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 3143 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-07 14:26:59,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:26:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:26:59,468 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:26:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-07 14:26:59,688 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:26:59,689 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 12 [2019-10-07 14:26:59,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:26:59,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:26:59,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:26:59,690 INFO L87 Difference]: Start difference. First operand 7230 states and 11047 transitions. Second operand 7 states. [2019-10-07 14:27:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:27:00,099 INFO L93 Difference]: Finished difference Result 14091 states and 21835 transitions. [2019-10-07 14:27:00,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:27:00,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 150 [2019-10-07 14:27:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:27:00,137 INFO L225 Difference]: With dead ends: 14091 [2019-10-07 14:27:00,138 INFO L226 Difference]: Without dead ends: 7421 [2019-10-07 14:27:00,161 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 293 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:27:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2019-10-07 14:27:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 7250. [2019-10-07 14:27:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7250 states. [2019-10-07 14:27:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7250 states to 7250 states and 11067 transitions. [2019-10-07 14:27:00,504 INFO L78 Accepts]: Start accepts. Automaton has 7250 states and 11067 transitions. Word has length 150 [2019-10-07 14:27:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:27:00,505 INFO L462 AbstractCegarLoop]: Abstraction has 7250 states and 11067 transitions. [2019-10-07 14:27:00,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:27:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 7250 states and 11067 transitions. [2019-10-07 14:27:00,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-07 14:27:00,511 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:27:00,511 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 14:27:00,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:00,719 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:27:00,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:27:00,720 INFO L82 PathProgramCache]: Analyzing trace with hash 908735318, now seen corresponding path program 1 times [2019-10-07 14:27:00,720 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:27:00,721 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:00,721 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:00,721 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:27:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-07 14:27:00,874 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:00,874 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:27:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:01,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 3133 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-07 14:27:01,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:27:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:27:01,579 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:27:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-07 14:27:01,799 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:27:01,800 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 12 [2019-10-07 14:27:01,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:27:01,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:27:01,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:27:01,801 INFO L87 Difference]: Start difference. First operand 7250 states and 11067 transitions. Second operand 7 states. [2019-10-07 14:27:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:27:02,174 INFO L93 Difference]: Finished difference Result 14131 states and 21875 transitions. [2019-10-07 14:27:02,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:27:02,175 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2019-10-07 14:27:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:27:02,217 INFO L225 Difference]: With dead ends: 14131 [2019-10-07 14:27:02,217 INFO L226 Difference]: Without dead ends: 7441 [2019-10-07 14:27:02,243 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 291 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:27:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7441 states. [2019-10-07 14:27:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7441 to 7310. [2019-10-07 14:27:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7310 states. [2019-10-07 14:27:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7310 states to 7310 states and 11157 transitions. [2019-10-07 14:27:02,604 INFO L78 Accepts]: Start accepts. Automaton has 7310 states and 11157 transitions. Word has length 149 [2019-10-07 14:27:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:27:02,609 INFO L462 AbstractCegarLoop]: Abstraction has 7310 states and 11157 transitions. [2019-10-07 14:27:02,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:27:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 7310 states and 11157 transitions. [2019-10-07 14:27:02,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-07 14:27:02,622 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:27:02,622 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:27:02,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:02,841 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:27:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:27:02,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1037444995, now seen corresponding path program 1 times [2019-10-07 14:27:02,841 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:27:02,841 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:02,841 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:02,842 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:27:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-07 14:27:03,041 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:03,042 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:27:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:03,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 3148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-07 14:27:03,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:27:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:27:03,732 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:27:03,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-07 14:27:04,076 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:27:04,076 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2019-10-07 14:27:04,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 14:27:04,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 14:27:04,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-07 14:27:04,077 INFO L87 Difference]: Start difference. First operand 7310 states and 11157 transitions. Second operand 6 states. [2019-10-07 14:27:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:27:04,495 INFO L93 Difference]: Finished difference Result 15684 states and 24511 transitions. [2019-10-07 14:27:04,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 14:27:04,495 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2019-10-07 14:27:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:27:04,538 INFO L225 Difference]: With dead ends: 15684 [2019-10-07 14:27:04,538 INFO L226 Difference]: Without dead ends: 7310 [2019-10-07 14:27:04,568 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 323 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-07 14:27:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7310 states. [2019-10-07 14:27:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7310 to 7310. [2019-10-07 14:27:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7310 states. [2019-10-07 14:27:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7310 states to 7310 states and 10985 transitions. [2019-10-07 14:27:04,928 INFO L78 Accepts]: Start accepts. Automaton has 7310 states and 10985 transitions. Word has length 165 [2019-10-07 14:27:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:27:04,928 INFO L462 AbstractCegarLoop]: Abstraction has 7310 states and 10985 transitions. [2019-10-07 14:27:04,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 14:27:04,929 INFO L276 IsEmpty]: Start isEmpty. Operand 7310 states and 10985 transitions. [2019-10-07 14:27:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-07 14:27:04,935 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:27:04,935 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:27:05,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:05,144 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:27:05,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:27:05,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1056648237, now seen corresponding path program 1 times [2019-10-07 14:27:05,145 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:27:05,145 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:05,146 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:05,146 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:05,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:27:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-07 14:27:05,316 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:05,316 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:27:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:05,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 3152 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-07 14:27:05,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:27:05,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:05,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-07 14:27:06,028 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:27:06,191 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2019-10-07 14:27:06,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:06,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-07 14:27:06,427 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:27:06,428 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-07 14:27:06,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 14:27:06,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 14:27:06,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2019-10-07 14:27:06,429 INFO L87 Difference]: Start difference. First operand 7310 states and 10985 transitions. Second operand 9 states. [2019-10-07 14:27:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:27:12,910 INFO L93 Difference]: Finished difference Result 14498 states and 22620 transitions. [2019-10-07 14:27:12,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-07 14:27:12,910 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 169 [2019-10-07 14:27:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:27:12,991 INFO L225 Difference]: With dead ends: 14498 [2019-10-07 14:27:12,991 INFO L226 Difference]: Without dead ends: 14495 [2019-10-07 14:27:13,007 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 335 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2019-10-07 14:27:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14495 states. [2019-10-07 14:27:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14495 to 13937. [2019-10-07 14:27:13,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13937 states. [2019-10-07 14:27:13,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13937 states to 13937 states and 21472 transitions. [2019-10-07 14:27:13,950 INFO L78 Accepts]: Start accepts. Automaton has 13937 states and 21472 transitions. Word has length 169 [2019-10-07 14:27:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:27:13,950 INFO L462 AbstractCegarLoop]: Abstraction has 13937 states and 21472 transitions. [2019-10-07 14:27:13,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-07 14:27:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 13937 states and 21472 transitions. [2019-10-07 14:27:13,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-07 14:27:13,959 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:27:13,959 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:27:14,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:14,167 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:27:14,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:27:14,168 INFO L82 PathProgramCache]: Analyzing trace with hash 752617790, now seen corresponding path program 1 times [2019-10-07 14:27:14,168 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:27:14,168 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:14,168 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:14,168 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:27:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-07 14:27:14,342 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:14,343 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:27:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:14,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 3169 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-07 14:27:14,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:27:15,163 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-07 14:27:15,430 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-10-07 14:27:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-07 14:27:15,501 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:27:15,856 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:27:16,248 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:27:16,692 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:27:16,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:16,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:16,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:16,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:16,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:17,030 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2019-10-07 14:27:17,488 WARN L191 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 13 [2019-10-07 14:27:17,599 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2019-10-07 14:28:09,151 WARN L191 SmtUtils]: Spent 51.22 s on a formula simplification. DAG size of input: 1454 DAG size of output: 55 [2019-10-07 14:28:57,700 WARN L191 SmtUtils]: Spent 47.63 s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 [2019-10-07 14:28:58,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:28:58,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:28:58,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:28:58,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:28:58,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:28:58,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:29:46,491 WARN L191 SmtUtils]: Spent 47.97 s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 [2019-10-07 14:29:46,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:29:46,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:29:46,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:29:46,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:29:46,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:29:46,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:29:46,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:29:46,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:29:46,839 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2019-10-07 14:29:47,108 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 13 [2019-10-07 14:29:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-07 14:29:47,200 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:29:47,201 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [13, 14] imperfect sequences [7] total 29 [2019-10-07 14:29:47,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-07 14:29:47,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-07 14:29:47,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2019-10-07 14:29:47,202 INFO L87 Difference]: Start difference. First operand 13937 states and 21472 transitions. Second operand 24 states. [2019-10-07 14:29:57,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:29:57,900 INFO L93 Difference]: Finished difference Result 28004 states and 44290 transitions. [2019-10-07 14:29:57,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-07 14:29:57,901 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 173 [2019-10-07 14:29:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:29:57,994 INFO L225 Difference]: With dead ends: 28004 [2019-10-07 14:29:57,994 INFO L226 Difference]: Without dead ends: 14913 [2019-10-07 14:29:58,042 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 326 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2019-10-07 14:29:58,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14913 states. [2019-10-07 14:29:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14913 to 13937. [2019-10-07 14:29:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13937 states. [2019-10-07 14:29:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13937 states to 13937 states and 21420 transitions. [2019-10-07 14:29:58,744 INFO L78 Accepts]: Start accepts. Automaton has 13937 states and 21420 transitions. Word has length 173 [2019-10-07 14:29:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:29:58,745 INFO L462 AbstractCegarLoop]: Abstraction has 13937 states and 21420 transitions. [2019-10-07 14:29:58,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-07 14:29:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 13937 states and 21420 transitions. [2019-10-07 14:29:58,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-07 14:29:58,752 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:29:58,752 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:29:58,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:29:58,961 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:29:58,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:29:58,961 INFO L82 PathProgramCache]: Analyzing trace with hash -120708762, now seen corresponding path program 1 times [2019-10-07 14:29:58,962 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:29:58,962 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:29:58,962 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:29:58,962 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:29:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:29:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:29:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-07 14:29:59,124 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:29:59,125 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:29:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:29:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:29:59,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:29:59,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:29:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:29:59,876 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:30:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-07 14:30:00,005 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:30:00,005 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 4] total 7 [2019-10-07 14:30:00,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:30:00,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:30:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:30:00,006 INFO L87 Difference]: Start difference. First operand 13937 states and 21420 transitions. Second operand 3 states. [2019-10-07 14:30:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:30:00,874 INFO L93 Difference]: Finished difference Result 39585 states and 63466 transitions. [2019-10-07 14:30:00,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:30:00,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2019-10-07 14:30:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:30:01,065 INFO L225 Difference]: With dead ends: 39585 [2019-10-07 14:30:01,065 INFO L226 Difference]: Without dead ends: 25646 [2019-10-07 14:30:01,151 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:30:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25646 states. [2019-10-07 14:30:03,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25646 to 25287. [2019-10-07 14:30:03,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25287 states. [2019-10-07 14:30:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25287 states to 25287 states and 39999 transitions. [2019-10-07 14:30:03,741 INFO L78 Accepts]: Start accepts. Automaton has 25287 states and 39999 transitions. Word has length 176 [2019-10-07 14:30:03,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:30:03,741 INFO L462 AbstractCegarLoop]: Abstraction has 25287 states and 39999 transitions. [2019-10-07 14:30:03,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:30:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 25287 states and 39999 transitions. [2019-10-07 14:30:03,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-07 14:30:03,750 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:30:03,751 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:30:03,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:30:03,960 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:30:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:30:03,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2142614883, now seen corresponding path program 1 times [2019-10-07 14:30:03,961 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:30:03,961 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:30:03,961 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:30:03,961 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:30:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:30:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:30:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-07 14:30:04,147 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:30:04,147 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:30:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:30:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:30:04,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 75 conjunts are in the unsatisfiable core [2019-10-07 14:30:04,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:30:04,992 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-07 14:30:05,325 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2019-10-07 14:30:05,554 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2019-10-07 14:30:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-07 14:30:05,631 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:30:05,989 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:30:06,348 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:30:06,804 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:30:07,159 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:30:07,621 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:30:07,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:30:07,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:30:07,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:30:07,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:30:07,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:30:08,099 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:30:08,518 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2019-10-07 14:30:08,787 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 13 [2019-10-07 14:30:58,315 WARN L191 SmtUtils]: Spent 49.10 s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 [2019-10-07 14:31:48,055 WARN L191 SmtUtils]: Spent 48.82 s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 [2019-10-07 14:31:48,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:31:48,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:31:48,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:31:48,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:31:48,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:37,216 WARN L191 SmtUtils]: Spent 48.26 s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 [2019-10-07 14:32:37,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:37,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:37,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:37,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:37,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:37,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-07 14:32:37,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:37,772 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2019-10-07 14:32:38,048 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 13 [2019-10-07 14:32:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-07 14:32:38,187 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:32:38,188 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [7, 22] total 42 [2019-10-07 14:32:38,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-07 14:32:38,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-07 14:32:38,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2019-10-07 14:32:38,189 INFO L87 Difference]: Start difference. First operand 25287 states and 39999 transitions. Second operand 18 states. [2019-10-07 14:32:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:32:55,098 INFO L93 Difference]: Finished difference Result 58563 states and 96806 transitions. [2019-10-07 14:32:55,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-07 14:32:55,099 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2019-10-07 14:32:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:32:55,369 INFO L225 Difference]: With dead ends: 58563 [2019-10-07 14:32:55,369 INFO L226 Difference]: Without dead ends: 34348 [2019-10-07 14:32:55,496 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 329 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=852, Invalid=4118, Unknown=0, NotChecked=0, Total=4970 [2019-10-07 14:32:55,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34348 states. [2019-10-07 14:32:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34348 to 30284. [2019-10-07 14:32:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30284 states. [2019-10-07 14:32:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30284 states to 30284 states and 48132 transitions. [2019-10-07 14:32:56,938 INFO L78 Accepts]: Start accepts. Automaton has 30284 states and 48132 transitions. Word has length 183 [2019-10-07 14:32:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:32:56,939 INFO L462 AbstractCegarLoop]: Abstraction has 30284 states and 48132 transitions. [2019-10-07 14:32:56,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-07 14:32:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 30284 states and 48132 transitions. [2019-10-07 14:32:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-07 14:32:56,946 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:32:56,946 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:32:57,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:32:57,156 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:32:57,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:32:57,156 INFO L82 PathProgramCache]: Analyzing trace with hash -594843138, now seen corresponding path program 1 times [2019-10-07 14:32:57,157 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:32:57,157 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:32:57,157 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:32:57,157 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:32:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:32:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:32:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-07 14:32:57,312 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:32:57,312 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:32:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:32:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:32:58,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-07 14:32:58,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:32:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-07 14:32:58,106 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:32:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-07 14:32:58,291 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:32:58,291 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [7] total 12 [2019-10-07 14:32:58,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:32:58,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:32:58,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:32:58,292 INFO L87 Difference]: Start difference. First operand 30284 states and 48132 transitions. Second operand 7 states. [2019-10-07 14:32:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:32:59,864 INFO L93 Difference]: Finished difference Result 46442 states and 75163 transitions. [2019-10-07 14:32:59,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:32:59,865 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2019-10-07 14:32:59,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:33:00,075 INFO L225 Difference]: With dead ends: 46442 [2019-10-07 14:33:00,075 INFO L226 Difference]: Without dead ends: 31526 [2019-10-07 14:33:00,166 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:33:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31526 states. [2019-10-07 14:33:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31526 to 31209. [2019-10-07 14:33:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31209 states. [2019-10-07 14:33:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31209 states to 31209 states and 49537 transitions. [2019-10-07 14:33:01,499 INFO L78 Accepts]: Start accepts. Automaton has 31209 states and 49537 transitions. Word has length 170 [2019-10-07 14:33:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:33:01,499 INFO L462 AbstractCegarLoop]: Abstraction has 31209 states and 49537 transitions. [2019-10-07 14:33:01,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:33:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 31209 states and 49537 transitions. [2019-10-07 14:33:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-07 14:33:01,505 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:33:01,505 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:33:01,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:33:01,707 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:33:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:33:01,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1213314239, now seen corresponding path program 1 times [2019-10-07 14:33:01,708 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:33:01,708 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:33:01,709 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:33:01,709 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:33:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:33:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:33:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-07 14:33:01,862 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:33:01,862 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:33:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:33:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:33:02,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 3194 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:33:02,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:33:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:33:02,626 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:33:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-07 14:33:02,762 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:33:02,762 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 4] total 9 [2019-10-07 14:33:02,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:33:02,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:33:02,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-07 14:33:02,763 INFO L87 Difference]: Start difference. First operand 31209 states and 49537 transitions. Second operand 3 states. [2019-10-07 14:33:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:33:06,163 INFO L93 Difference]: Finished difference Result 84585 states and 140105 transitions. [2019-10-07 14:33:06,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:33:06,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 186 [2019-10-07 14:33:06,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:33:06,503 INFO L225 Difference]: With dead ends: 84585 [2019-10-07 14:33:06,503 INFO L226 Difference]: Without dead ends: 53388 [2019-10-07 14:33:06,643 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-07 14:33:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53388 states. [2019-10-07 14:33:08,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53388 to 52926. [2019-10-07 14:33:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52926 states. [2019-10-07 14:33:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52926 states to 52926 states and 86752 transitions. [2019-10-07 14:33:09,344 INFO L78 Accepts]: Start accepts. Automaton has 52926 states and 86752 transitions. Word has length 186 [2019-10-07 14:33:09,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:33:09,345 INFO L462 AbstractCegarLoop]: Abstraction has 52926 states and 86752 transitions. [2019-10-07 14:33:09,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:33:09,345 INFO L276 IsEmpty]: Start isEmpty. Operand 52926 states and 86752 transitions. [2019-10-07 14:33:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-07 14:33:09,349 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:33:09,349 INFO L385 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:33:09,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:33:09,550 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:33:09,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:33:09,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1677048148, now seen corresponding path program 1 times [2019-10-07 14:33:09,551 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:33:09,552 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:33:09,552 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:33:09,552 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:33:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:33:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:33:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-07 14:33:09,719 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:33:09,719 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:33:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:33:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:33:10,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 3211 conjuncts, 94 conjunts are in the unsatisfiable core [2019-10-07 14:33:10,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:33:10,605 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-07 14:33:10,965 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2019-10-07 14:33:11,217 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2019-10-07 14:33:11,492 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2019-10-07 14:33:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-07 14:33:11,591 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:33:11,939 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:33:12,291 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:33:12,644 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:33:13,142 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:33:13,492 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:33:13,858 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:33:14,372 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:33:14,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:33:14,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:33:14,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:33:14,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:33:14,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:33:15,392 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:33:15,881 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:33:16,223 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2019-10-07 14:33:16,494 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 13 [2019-10-07 14:34:08,394 WARN L191 SmtUtils]: Spent 51.49 s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 [2019-10-07 14:34:56,249 WARN L191 SmtUtils]: Spent 46.96 s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 [2019-10-07 14:34:56,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:34:56,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:34:56,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:34:56,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:35:44,439 WARN L191 SmtUtils]: Spent 47.34 s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 [2019-10-07 14:35:44,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:35:44,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:35:44,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:35:44,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:35:44,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-07 14:35:44,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-07 14:35:44,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:35:45,046 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2019-10-07 14:35:45,340 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 13 [2019-10-07 14:35:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-07 14:35:45,542 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:35:45,543 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [7, 26] total 50 [2019-10-07 14:35:45,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-07 14:35:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-07 14:35:45,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2073, Unknown=0, NotChecked=0, Total=2450 [2019-10-07 14:35:45,545 INFO L87 Difference]: Start difference. First operand 52926 states and 86752 transitions. Second operand 22 states. [2019-10-07 14:36:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:36:07,383 INFO L93 Difference]: Finished difference Result 115334 states and 201990 transitions. [2019-10-07 14:36:07,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-10-07 14:36:07,385 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 193 [2019-10-07 14:36:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:36:07,853 INFO L225 Difference]: With dead ends: 115334 [2019-10-07 14:36:07,854 INFO L226 Difference]: Without dead ends: 64294 [2019-10-07 14:36:08,059 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 340 SyntacticMatches, 8 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1620, Invalid=7310, Unknown=0, NotChecked=0, Total=8930 [2019-10-07 14:36:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64294 states. [2019-10-07 14:36:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64294 to 53730. [2019-10-07 14:36:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53730 states. [2019-10-07 14:36:11,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53730 states to 53730 states and 88170 transitions. [2019-10-07 14:36:11,313 INFO L78 Accepts]: Start accepts. Automaton has 53730 states and 88170 transitions. Word has length 193 [2019-10-07 14:36:11,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:36:11,314 INFO L462 AbstractCegarLoop]: Abstraction has 53730 states and 88170 transitions. [2019-10-07 14:36:11,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-07 14:36:11,314 INFO L276 IsEmpty]: Start isEmpty. Operand 53730 states and 88170 transitions. [2019-10-07 14:36:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-07 14:36:11,318 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:36:11,318 INFO L385 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:36:11,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:36:11,519 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:36:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:36:11,520 INFO L82 PathProgramCache]: Analyzing trace with hash -352465544, now seen corresponding path program 1 times [2019-10-07 14:36:11,520 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:36:11,520 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:11,521 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:11,521 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:11,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:36:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:36:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-07 14:36:11,664 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:11,664 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:36:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:36:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:36:12,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 3215 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:36:12,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:36:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-07 14:36:12,516 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:36:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-07 14:36:12,670 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:36:12,670 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 4] total 9 [2019-10-07 14:36:12,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:36:12,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:36:12,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-07 14:36:12,672 INFO L87 Difference]: Start difference. First operand 53730 states and 88170 transitions. Second operand 3 states. [2019-10-07 14:36:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:36:19,971 INFO L93 Difference]: Finished difference Result 157427 states and 274407 transitions. [2019-10-07 14:36:19,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:36:19,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2019-10-07 14:36:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:36:20,609 INFO L225 Difference]: With dead ends: 157427 [2019-10-07 14:36:20,610 INFO L226 Difference]: Without dead ends: 103711 [2019-10-07 14:36:20,871 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-07 14:36:20,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103711 states. [2019-10-07 14:36:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103711 to 103090. [2019-10-07 14:36:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103090 states. [2019-10-07 14:36:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103090 states to 103090 states and 177033 transitions. [2019-10-07 14:36:27,138 INFO L78 Accepts]: Start accepts. Automaton has 103090 states and 177033 transitions. Word has length 196 [2019-10-07 14:36:27,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:36:27,138 INFO L462 AbstractCegarLoop]: Abstraction has 103090 states and 177033 transitions. [2019-10-07 14:36:27,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:36:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 103090 states and 177033 transitions. [2019-10-07 14:36:27,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-07 14:36:27,142 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:36:27,142 INFO L385 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:36:27,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:36:27,343 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:36:27,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:36:27,344 INFO L82 PathProgramCache]: Analyzing trace with hash -177692647, now seen corresponding path program 1 times [2019-10-07 14:36:27,344 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:36:27,345 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:27,345 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:27,345 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:36:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:36:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-07 14:36:27,504 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:27,504 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:36:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:36:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:36:28,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 3232 conjuncts, 113 conjunts are in the unsatisfiable core [2019-10-07 14:36:28,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:36:28,451 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-07 14:36:28,784 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2019-10-07 14:36:29,000 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2019-10-07 14:36:29,257 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2019-10-07 14:36:29,568 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2019-10-07 14:36:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-07 14:36:29,680 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:36:30,039 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:36:30,380 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:36:30,727 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:36:31,076 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:36:31,617 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:36:35,571 WARN L191 SmtUtils]: Spent 3.79 s on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:36:35,937 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:36:36,295 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:36:36,851 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:36:36,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:36:36,954 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:36:36,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:36:36,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:36:36,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:36:37,360 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:36:37,884 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:36:38,381 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:36:38,803 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2019-10-07 14:36:39,067 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 13 [2019-10-07 14:37:27,645 WARN L191 SmtUtils]: Spent 48.17 s on a formula simplification. DAG size of input: 1445 DAG size of output: 55