/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec3_product17.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:43:24,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:43:24,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:43:24,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:43:24,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:43:24,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:43:24,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:43:24,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:43:24,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:43:24,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:43:24,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:43:24,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:43:24,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:43:24,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:43:24,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:43:24,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:43:24,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:43:24,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:43:24,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:43:24,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:43:24,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:43:24,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:43:24,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:43:24,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:43:24,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:43:24,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:43:24,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:43:24,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:43:24,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:43:24,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:43:24,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:43:24,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:43:24,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:43:24,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:43:24,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:43:24,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:43:24,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:43:24,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:43:24,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:43:24,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:43:24,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:43:24,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:43:24,607 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:43:24,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:43:24,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:43:24,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:43:24,609 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:43:24,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:43:24,610 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:43:24,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:43:24,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:43:24,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:43:24,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:43:24,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:43:24,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:43:24,611 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:43:24,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:43:24,612 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:43:24,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:43:24,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:43:24,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:43:24,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:43:24,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:43:24,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:43:24,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:43:24,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:43:24,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:43:24,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:43:24,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:43:24,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:43:24,615 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:43:24,925 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:43:24,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:43:24,955 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:43:24,956 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:43:24,957 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:43:24,958 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product17.cil.c [2019-11-07 00:43:25,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef45e0823/5c356c47d354458dac2c81acd72a1a7f/FLAG9fd4e4804 [2019-11-07 00:43:25,642 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:43:25,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product17.cil.c [2019-11-07 00:43:25,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef45e0823/5c356c47d354458dac2c81acd72a1a7f/FLAG9fd4e4804 [2019-11-07 00:43:25,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef45e0823/5c356c47d354458dac2c81acd72a1a7f [2019-11-07 00:43:25,872 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:43:25,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:43:25,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:43:25,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:43:25,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:43:25,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:43:25" (1/1) ... [2019-11-07 00:43:25,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408fb42a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:25, skipping insertion in model container [2019-11-07 00:43:25,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:43:25" (1/1) ... [2019-11-07 00:43:25,890 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:43:25,969 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:43:26,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:43:26,752 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:43:26,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:43:26,998 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:43:26,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:26 WrapperNode [2019-11-07 00:43:26,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:43:27,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:43:27,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:43:27,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:43:27,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:26" (1/1) ... [2019-11-07 00:43:27,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:26" (1/1) ... [2019-11-07 00:43:27,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:26" (1/1) ... [2019-11-07 00:43:27,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:26" (1/1) ... [2019-11-07 00:43:27,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:26" (1/1) ... [2019-11-07 00:43:27,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:26" (1/1) ... [2019-11-07 00:43:27,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:26" (1/1) ... [2019-11-07 00:43:27,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:43:27,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:43:27,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:43:27,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:43:27,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:43:27,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:43:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:43:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:43:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:43:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:43:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:43:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:43:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:43:27,293 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:43:27,293 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:43:27,293 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:43:27,294 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:43:27,294 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:43:27,295 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:43:27,295 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:43:27,295 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:43:27,298 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:43:27,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:43:27,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:43:27,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:43:27,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:43:27,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:43:27,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:43:27,300 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:43:27,300 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:43:27,300 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:43:27,300 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:43:27,301 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:43:27,301 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:43:27,301 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:43:27,301 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:43:27,302 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:43:27,302 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:43:27,302 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:43:27,303 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:43:27,303 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:43:27,304 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:43:27,304 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:43:27,304 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:43:27,304 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:43:27,304 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:43:27,305 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:43:27,305 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:43:27,305 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:43:27,305 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:43:27,306 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:43:27,306 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:43:27,306 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:43:27,306 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:43:27,307 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:43:27,307 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:43:27,307 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:43:27,307 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:43:27,308 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:43:27,308 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:43:27,308 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:43:27,308 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:43:27,308 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:43:27,308 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:43:27,309 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:43:27,309 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:43:27,309 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:43:27,310 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:43:27,310 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:43:27,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:43:27,310 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:43:27,310 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:43:27,311 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:43:27,311 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:43:27,311 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:43:27,311 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:43:27,311 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:43:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:43:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:43:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:43:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:43:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:43:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:43:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:43:27,315 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:43:27,315 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:43:27,315 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:43:27,316 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:43:27,316 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:43:27,317 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:43:27,317 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:43:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:43:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:43:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:43:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:43:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:43:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:43:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:43:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:43:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:43:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:43:27,321 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:43:27,321 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:43:27,321 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:43:27,321 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:43:27,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:43:27,321 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:43:27,322 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:43:27,322 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:43:27,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:43:27,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:43:27,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:43:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:43:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:43:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:43:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:43:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:43:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:43:27,324 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:43:27,324 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:43:27,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:43:27,325 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:43:27,325 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:43:27,325 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:43:27,325 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:43:27,326 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:43:27,326 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:43:27,326 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:43:27,326 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:43:27,328 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:43:27,328 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:43:27,328 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:43:27,328 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:43:27,328 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:43:27,328 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:43:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:43:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:43:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:43:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:43:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:43:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:43:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:43:27,334 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:43:27,334 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:43:27,335 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:43:27,335 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:43:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:43:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:43:27,337 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:43:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:43:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:43:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:43:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:43:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:43:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:43:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:43:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:43:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:43:27,346 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:43:27,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:43:27,346 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:43:27,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:43:27,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:43:27,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:43:29,768 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:43:29,768 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:43:29,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:43:29 BoogieIcfgContainer [2019-11-07 00:43:29,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:43:29,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:43:29,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:43:29,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:43:29,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:43:25" (1/3) ... [2019-11-07 00:43:29,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cca93ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:43:29, skipping insertion in model container [2019-11-07 00:43:29,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:26" (2/3) ... [2019-11-07 00:43:29,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cca93ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:43:29, skipping insertion in model container [2019-11-07 00:43:29,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:43:29" (3/3) ... [2019-11-07 00:43:29,780 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product17.cil.c [2019-11-07 00:43:29,791 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:43:29,801 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:43:29,812 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:43:29,856 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:43:29,857 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:43:29,857 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:43:29,857 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:43:29,857 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:43:29,857 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:43:29,857 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:43:29,857 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:43:29,900 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states. [2019-11-07 00:43:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-07 00:43:29,926 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:29,927 INFO L410 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] [2019-11-07 00:43:29,929 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:29,935 INFO L82 PathProgramCache]: Analyzing trace with hash 766900618, now seen corresponding path program 1 times [2019-11-07 00:43:29,945 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:29,945 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749661926] [2019-11-07 00:43:29,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:30,726 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749661926] [2019-11-07 00:43:30,727 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:30,728 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:30,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511227524] [2019-11-07 00:43:30,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:30,738 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:30,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:30,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:30,759 INFO L87 Difference]: Start difference. First operand 762 states. Second operand 7 states. [2019-11-07 00:43:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:31,076 INFO L93 Difference]: Finished difference Result 1203 states and 1962 transitions. [2019-11-07 00:43:31,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:31,078 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2019-11-07 00:43:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:31,111 INFO L225 Difference]: With dead ends: 1203 [2019-11-07 00:43:31,112 INFO L226 Difference]: Without dead ends: 610 [2019-11-07 00:43:31,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2019-11-07 00:43:31,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 608. [2019-11-07 00:43:31,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2019-11-07 00:43:31,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 976 transitions. [2019-11-07 00:43:31,258 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 976 transitions. Word has length 115 [2019-11-07 00:43:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:31,259 INFO L462 AbstractCegarLoop]: Abstraction has 608 states and 976 transitions. [2019-11-07 00:43:31,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:31,260 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 976 transitions. [2019-11-07 00:43:31,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-07 00:43:31,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:31,272 INFO L410 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] [2019-11-07 00:43:31,272 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:31,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2028873896, now seen corresponding path program 1 times [2019-11-07 00:43:31,273 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:31,273 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48516213] [2019-11-07 00:43:31,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:31,497 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48516213] [2019-11-07 00:43:31,498 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:31,498 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:43:31,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455792922] [2019-11-07 00:43:31,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:31,500 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:31,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:31,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:43:31,501 INFO L87 Difference]: Start difference. First operand 608 states and 976 transitions. Second operand 4 states. [2019-11-07 00:43:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:31,572 INFO L93 Difference]: Finished difference Result 1182 states and 1917 transitions. [2019-11-07 00:43:31,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:43:31,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-11-07 00:43:31,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:31,578 INFO L225 Difference]: With dead ends: 1182 [2019-11-07 00:43:31,579 INFO L226 Difference]: Without dead ends: 590 [2019-11-07 00:43:31,583 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2019-11-07 00:43:31,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2019-11-07 00:43:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-07 00:43:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 943 transitions. [2019-11-07 00:43:31,663 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 943 transitions. Word has length 116 [2019-11-07 00:43:31,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:31,663 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 943 transitions. [2019-11-07 00:43:31,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:43:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 943 transitions. [2019-11-07 00:43:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-07 00:43:31,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:31,668 INFO L410 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] [2019-11-07 00:43:31,668 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:31,669 INFO L82 PathProgramCache]: Analyzing trace with hash -597122142, now seen corresponding path program 1 times [2019-11-07 00:43:31,669 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:31,669 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63500852] [2019-11-07 00:43:31,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:31,854 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63500852] [2019-11-07 00:43:31,854 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:31,855 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:31,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071669160] [2019-11-07 00:43:31,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:31,860 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:31,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:31,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:31,861 INFO L87 Difference]: Start difference. First operand 590 states and 943 transitions. Second operand 7 states. [2019-11-07 00:43:31,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:31,994 INFO L93 Difference]: Finished difference Result 1151 states and 1859 transitions. [2019-11-07 00:43:31,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:31,995 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2019-11-07 00:43:31,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:32,005 INFO L225 Difference]: With dead ends: 1151 [2019-11-07 00:43:32,006 INFO L226 Difference]: Without dead ends: 584 [2019-11-07 00:43:32,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-07 00:43:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-11-07 00:43:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-11-07 00:43:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 930 transitions. [2019-11-07 00:43:32,071 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 930 transitions. Word has length 116 [2019-11-07 00:43:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:32,075 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 930 transitions. [2019-11-07 00:43:32,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 930 transitions. [2019-11-07 00:43:32,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-07 00:43:32,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:32,081 INFO L410 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] [2019-11-07 00:43:32,081 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:32,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:32,082 INFO L82 PathProgramCache]: Analyzing trace with hash 28817582, now seen corresponding path program 1 times [2019-11-07 00:43:32,082 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:32,082 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205395086] [2019-11-07 00:43:32,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:32,308 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205395086] [2019-11-07 00:43:32,308 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:32,309 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:32,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186834786] [2019-11-07 00:43:32,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:32,310 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:32,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:32,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:32,312 INFO L87 Difference]: Start difference. First operand 584 states and 930 transitions. Second operand 7 states. [2019-11-07 00:43:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:32,425 INFO L93 Difference]: Finished difference Result 1139 states and 1833 transitions. [2019-11-07 00:43:32,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:32,426 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 117 [2019-11-07 00:43:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:32,432 INFO L225 Difference]: With dead ends: 1139 [2019-11-07 00:43:32,432 INFO L226 Difference]: Without dead ends: 578 [2019-11-07 00:43:32,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2019-11-07 00:43:32,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2019-11-07 00:43:32,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2019-11-07 00:43:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 917 transitions. [2019-11-07 00:43:32,468 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 917 transitions. Word has length 117 [2019-11-07 00:43:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:32,469 INFO L462 AbstractCegarLoop]: Abstraction has 578 states and 917 transitions. [2019-11-07 00:43:32,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 917 transitions. [2019-11-07 00:43:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-07 00:43:32,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:32,475 INFO L410 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] [2019-11-07 00:43:32,475 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:32,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2080915130, now seen corresponding path program 1 times [2019-11-07 00:43:32,476 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:32,477 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457045616] [2019-11-07 00:43:32,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:32,746 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457045616] [2019-11-07 00:43:32,747 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:32,747 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:32,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143254621] [2019-11-07 00:43:32,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:32,748 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:32,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:32,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:32,749 INFO L87 Difference]: Start difference. First operand 578 states and 917 transitions. Second operand 7 states. [2019-11-07 00:43:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:32,845 INFO L93 Difference]: Finished difference Result 1127 states and 1807 transitions. [2019-11-07 00:43:32,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:32,846 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2019-11-07 00:43:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:32,851 INFO L225 Difference]: With dead ends: 1127 [2019-11-07 00:43:32,852 INFO L226 Difference]: Without dead ends: 572 [2019-11-07 00:43:32,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-11-07 00:43:32,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-11-07 00:43:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-11-07 00:43:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 904 transitions. [2019-11-07 00:43:32,881 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 904 transitions. Word has length 118 [2019-11-07 00:43:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:32,881 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 904 transitions. [2019-11-07 00:43:32,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 904 transitions. [2019-11-07 00:43:32,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-07 00:43:32,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:32,886 INFO L410 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] [2019-11-07 00:43:32,887 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:32,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1033464967, now seen corresponding path program 1 times [2019-11-07 00:43:32,887 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:32,887 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795349323] [2019-11-07 00:43:32,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:33,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795349323] [2019-11-07 00:43:33,069 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:33,069 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:33,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522228730] [2019-11-07 00:43:33,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:33,070 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:33,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:33,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:33,071 INFO L87 Difference]: Start difference. First operand 572 states and 904 transitions. Second operand 7 states. [2019-11-07 00:43:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:33,156 INFO L93 Difference]: Finished difference Result 1115 states and 1781 transitions. [2019-11-07 00:43:33,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:33,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2019-11-07 00:43:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:33,167 INFO L225 Difference]: With dead ends: 1115 [2019-11-07 00:43:33,167 INFO L226 Difference]: Without dead ends: 572 [2019-11-07 00:43:33,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-11-07 00:43:33,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-11-07 00:43:33,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-11-07 00:43:33,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 903 transitions. [2019-11-07 00:43:33,198 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 903 transitions. Word has length 118 [2019-11-07 00:43:33,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:33,199 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 903 transitions. [2019-11-07 00:43:33,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:33,199 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 903 transitions. [2019-11-07 00:43:33,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-07 00:43:33,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:33,202 INFO L410 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] [2019-11-07 00:43:33,202 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:33,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:33,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1197819858, now seen corresponding path program 1 times [2019-11-07 00:43:33,203 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:33,203 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637631959] [2019-11-07 00:43:33,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:33,403 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637631959] [2019-11-07 00:43:33,403 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:33,403 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:33,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781572926] [2019-11-07 00:43:33,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:33,404 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:33,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:33,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:33,405 INFO L87 Difference]: Start difference. First operand 572 states and 903 transitions. Second operand 5 states. [2019-11-07 00:43:33,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:33,482 INFO L93 Difference]: Finished difference Result 1114 states and 1778 transitions. [2019-11-07 00:43:33,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:33,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2019-11-07 00:43:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:33,488 INFO L225 Difference]: With dead ends: 1114 [2019-11-07 00:43:33,488 INFO L226 Difference]: Without dead ends: 572 [2019-11-07 00:43:33,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-11-07 00:43:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-11-07 00:43:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-11-07 00:43:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 902 transitions. [2019-11-07 00:43:33,514 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 902 transitions. Word has length 119 [2019-11-07 00:43:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:33,514 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 902 transitions. [2019-11-07 00:43:33,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 902 transitions. [2019-11-07 00:43:33,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-07 00:43:33,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:33,518 INFO L410 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] [2019-11-07 00:43:33,518 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:33,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2117874534, now seen corresponding path program 1 times [2019-11-07 00:43:33,519 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:33,519 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452961238] [2019-11-07 00:43:33,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:33,679 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452961238] [2019-11-07 00:43:33,680 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:33,680 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:33,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8111101] [2019-11-07 00:43:33,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:33,681 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:33,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:33,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:33,681 INFO L87 Difference]: Start difference. First operand 572 states and 902 transitions. Second operand 5 states. [2019-11-07 00:43:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:33,754 INFO L93 Difference]: Finished difference Result 1114 states and 1776 transitions. [2019-11-07 00:43:33,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:33,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2019-11-07 00:43:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:33,760 INFO L225 Difference]: With dead ends: 1114 [2019-11-07 00:43:33,760 INFO L226 Difference]: Without dead ends: 572 [2019-11-07 00:43:33,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-11-07 00:43:33,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-11-07 00:43:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-11-07 00:43:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 901 transitions. [2019-11-07 00:43:33,787 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 901 transitions. Word has length 120 [2019-11-07 00:43:33,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:33,788 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 901 transitions. [2019-11-07 00:43:33,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:33,788 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 901 transitions. [2019-11-07 00:43:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-07 00:43:33,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:33,792 INFO L410 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] [2019-11-07 00:43:33,792 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1349008403, now seen corresponding path program 1 times [2019-11-07 00:43:33,793 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:33,793 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452700077] [2019-11-07 00:43:33,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:33,935 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452700077] [2019-11-07 00:43:33,936 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:33,937 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:33,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662423879] [2019-11-07 00:43:33,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:33,938 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:33,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:33,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:33,938 INFO L87 Difference]: Start difference. First operand 572 states and 901 transitions. Second operand 5 states. [2019-11-07 00:43:34,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:34,014 INFO L93 Difference]: Finished difference Result 1114 states and 1774 transitions. [2019-11-07 00:43:34,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:34,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2019-11-07 00:43:34,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:34,019 INFO L225 Difference]: With dead ends: 1114 [2019-11-07 00:43:34,020 INFO L226 Difference]: Without dead ends: 572 [2019-11-07 00:43:34,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-11-07 00:43:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-11-07 00:43:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-11-07 00:43:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 900 transitions. [2019-11-07 00:43:34,046 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 900 transitions. Word has length 121 [2019-11-07 00:43:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:34,047 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 900 transitions. [2019-11-07 00:43:34,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 900 transitions. [2019-11-07 00:43:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-07 00:43:34,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:34,051 INFO L410 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, 1] [2019-11-07 00:43:34,051 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1487182357, now seen corresponding path program 1 times [2019-11-07 00:43:34,052 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:34,052 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53599859] [2019-11-07 00:43:34,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:34,208 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53599859] [2019-11-07 00:43:34,208 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:34,208 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:34,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123996549] [2019-11-07 00:43:34,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:34,280 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:34,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:34,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:34,281 INFO L87 Difference]: Start difference. First operand 572 states and 900 transitions. Second operand 5 states. [2019-11-07 00:43:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:34,369 INFO L93 Difference]: Finished difference Result 1114 states and 1772 transitions. [2019-11-07 00:43:34,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:34,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2019-11-07 00:43:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:34,377 INFO L225 Difference]: With dead ends: 1114 [2019-11-07 00:43:34,377 INFO L226 Difference]: Without dead ends: 572 [2019-11-07 00:43:34,382 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-11-07 00:43:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-11-07 00:43:34,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-11-07 00:43:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 899 transitions. [2019-11-07 00:43:34,408 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 899 transitions. Word has length 122 [2019-11-07 00:43:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:34,409 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 899 transitions. [2019-11-07 00:43:34,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 899 transitions. [2019-11-07 00:43:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-07 00:43:34,414 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:34,414 INFO L410 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, 1, 1] [2019-11-07 00:43:34,415 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:34,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:34,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1599417670, now seen corresponding path program 1 times [2019-11-07 00:43:34,416 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:34,416 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736477689] [2019-11-07 00:43:34,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:34,651 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736477689] [2019-11-07 00:43:34,652 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:34,652 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-07 00:43:34,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908019218] [2019-11-07 00:43:34,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:43:34,653 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:34,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:43:34,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:43:34,654 INFO L87 Difference]: Start difference. First operand 572 states and 899 transitions. Second operand 9 states. [2019-11-07 00:43:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:34,819 INFO L93 Difference]: Finished difference Result 1116 states and 1771 transitions. [2019-11-07 00:43:34,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:43:34,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2019-11-07 00:43:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:34,824 INFO L225 Difference]: With dead ends: 1116 [2019-11-07 00:43:34,825 INFO L226 Difference]: Without dead ends: 572 [2019-11-07 00:43:34,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:43:34,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-11-07 00:43:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-11-07 00:43:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-11-07 00:43:34,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 898 transitions. [2019-11-07 00:43:34,849 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 898 transitions. Word has length 123 [2019-11-07 00:43:34,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:34,850 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 898 transitions. [2019-11-07 00:43:34,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:43:34,850 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 898 transitions. [2019-11-07 00:43:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-07 00:43:34,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:34,853 INFO L410 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, 1, 1] [2019-11-07 00:43:34,854 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:34,854 INFO L82 PathProgramCache]: Analyzing trace with hash -309040120, now seen corresponding path program 1 times [2019-11-07 00:43:34,854 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:34,854 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336105509] [2019-11-07 00:43:34,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:43:35,050 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336105509] [2019-11-07 00:43:35,051 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12859050] [2019-11-07 00:43:35,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:35,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:35,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:43:35,742 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:35,874 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:35,874 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 00:43:35,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448811567] [2019-11-07 00:43:35,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:35,875 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:35,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:35,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:35,876 INFO L87 Difference]: Start difference. First operand 572 states and 898 transitions. Second operand 3 states. [2019-11-07 00:43:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:35,957 INFO L93 Difference]: Finished difference Result 1592 states and 2552 transitions. [2019-11-07 00:43:35,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:35,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-11-07 00:43:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:35,966 INFO L225 Difference]: With dead ends: 1592 [2019-11-07 00:43:35,967 INFO L226 Difference]: Without dead ends: 1054 [2019-11-07 00:43:35,970 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-11-07 00:43:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1041. [2019-11-07 00:43:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1041 states. [2019-11-07 00:43:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1657 transitions. [2019-11-07 00:43:36,016 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1657 transitions. Word has length 123 [2019-11-07 00:43:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:36,017 INFO L462 AbstractCegarLoop]: Abstraction has 1041 states and 1657 transitions. [2019-11-07 00:43:36,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:36,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1657 transitions. [2019-11-07 00:43:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-07 00:43:36,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:36,022 INFO L410 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, 1, 1, 1] [2019-11-07 00:43:36,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:36,238 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:36,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:36,238 INFO L82 PathProgramCache]: Analyzing trace with hash 353455773, now seen corresponding path program 1 times [2019-11-07 00:43:36,238 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:36,239 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671342329] [2019-11-07 00:43:36,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:43:36,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671342329] [2019-11-07 00:43:36,437 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205174908] [2019-11-07 00:43:36,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:37,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:37,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:43:37,244 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:37,356 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:37,357 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 00:43:37,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913148380] [2019-11-07 00:43:37,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:37,358 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:37,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:37,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:37,359 INFO L87 Difference]: Start difference. First operand 1041 states and 1657 transitions. Second operand 3 states. [2019-11-07 00:43:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:37,454 INFO L93 Difference]: Finished difference Result 2530 states and 4072 transitions. [2019-11-07 00:43:37,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:37,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-11-07 00:43:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:37,467 INFO L225 Difference]: With dead ends: 2530 [2019-11-07 00:43:37,467 INFO L226 Difference]: Without dead ends: 1523 [2019-11-07 00:43:37,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2019-11-07 00:43:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1474. [2019-11-07 00:43:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2019-11-07 00:43:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2370 transitions. [2019-11-07 00:43:37,538 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2370 transitions. Word has length 124 [2019-11-07 00:43:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:37,538 INFO L462 AbstractCegarLoop]: Abstraction has 1474 states and 2370 transitions. [2019-11-07 00:43:37,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2370 transitions. [2019-11-07 00:43:37,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-07 00:43:37,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:37,545 INFO L410 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, 1, 1, 1, 1, 1] [2019-11-07 00:43:37,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:37,752 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:37,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:37,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1484756798, now seen corresponding path program 1 times [2019-11-07 00:43:37,753 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:37,754 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212316951] [2019-11-07 00:43:37,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:37,980 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212316951] [2019-11-07 00:43:37,980 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:37,981 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:37,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304126439] [2019-11-07 00:43:37,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:37,986 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:37,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:37,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:37,987 INFO L87 Difference]: Start difference. First operand 1474 states and 2370 transitions. Second operand 7 states. [2019-11-07 00:43:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:41,211 INFO L93 Difference]: Finished difference Result 4344 states and 7131 transitions. [2019-11-07 00:43:41,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:43:41,212 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2019-11-07 00:43:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:41,235 INFO L225 Difference]: With dead ends: 4344 [2019-11-07 00:43:41,235 INFO L226 Difference]: Without dead ends: 2904 [2019-11-07 00:43:41,246 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:43:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2019-11-07 00:43:41,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2834. [2019-11-07 00:43:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-11-07 00:43:41,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 4634 transitions. [2019-11-07 00:43:41,421 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 4634 transitions. Word has length 126 [2019-11-07 00:43:41,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:41,421 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 4634 transitions. [2019-11-07 00:43:41,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 4634 transitions. [2019-11-07 00:43:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-07 00:43:41,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:41,429 INFO L410 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, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:41,429 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:41,430 INFO L82 PathProgramCache]: Analyzing trace with hash 612328635, now seen corresponding path program 1 times [2019-11-07 00:43:41,430 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:41,430 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290940543] [2019-11-07 00:43:41,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:43:41,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290940543] [2019-11-07 00:43:41,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015110180] [2019-11-07 00:43:41,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:42,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 3007 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 00:43:42,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:43:42,419 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:42,604 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:42,605 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [11] total 14 [2019-11-07 00:43:42,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982446860] [2019-11-07 00:43:42,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:42,606 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:42,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:42,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:43:42,607 INFO L87 Difference]: Start difference. First operand 2834 states and 4634 transitions. Second operand 5 states. [2019-11-07 00:43:45,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:45,061 INFO L93 Difference]: Finished difference Result 13026 states and 21545 transitions. [2019-11-07 00:43:45,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:45,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2019-11-07 00:43:45,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:45,160 INFO L225 Difference]: With dead ends: 13026 [2019-11-07 00:43:45,161 INFO L226 Difference]: Without dead ends: 10227 [2019-11-07 00:43:45,189 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:43:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10227 states. [2019-11-07 00:43:45,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10227 to 10107. [2019-11-07 00:43:45,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10107 states. [2019-11-07 00:43:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 16392 transitions. [2019-11-07 00:43:45,714 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 16392 transitions. Word has length 127 [2019-11-07 00:43:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:45,715 INFO L462 AbstractCegarLoop]: Abstraction has 10107 states and 16392 transitions. [2019-11-07 00:43:45,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 16392 transitions. [2019-11-07 00:43:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-07 00:43:45,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:45,722 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:45,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:45,930 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:45,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:45,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1829505526, now seen corresponding path program 1 times [2019-11-07 00:43:45,931 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:45,931 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10693109] [2019-11-07 00:43:45,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:43:46,264 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10693109] [2019-11-07 00:43:46,264 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488325184] [2019-11-07 00:43:46,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:47,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 3021 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:43:47,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:43:47,562 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:47,659 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:47,659 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 11 [2019-11-07 00:43:47,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125178129] [2019-11-07 00:43:47,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:47,661 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:47,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:43:47,661 INFO L87 Difference]: Start difference. First operand 10107 states and 16392 transitions. Second operand 3 states. [2019-11-07 00:43:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:48,337 INFO L93 Difference]: Finished difference Result 28008 states and 45865 transitions. [2019-11-07 00:43:48,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:48,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-11-07 00:43:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:48,515 INFO L225 Difference]: With dead ends: 28008 [2019-11-07 00:43:48,516 INFO L226 Difference]: Without dead ends: 18020 [2019-11-07 00:43:48,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:43:48,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18020 states. [2019-11-07 00:43:49,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18020 to 17854. [2019-11-07 00:43:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17854 states. [2019-11-07 00:43:49,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 28984 transitions. [2019-11-07 00:43:49,449 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 28984 transitions. Word has length 132 [2019-11-07 00:43:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:49,451 INFO L462 AbstractCegarLoop]: Abstraction has 17854 states and 28984 transitions. [2019-11-07 00:43:49,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 28984 transitions. [2019-11-07 00:43:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-07 00:43:49,460 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:49,460 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:49,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:49,668 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:49,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1185598092, now seen corresponding path program 1 times [2019-11-07 00:43:49,669 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:49,669 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907701172] [2019-11-07 00:43:49,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:43:49,881 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907701172] [2019-11-07 00:43:49,882 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885225120] [2019-11-07 00:43:49,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:50,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 3020 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 00:43:50,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:43:50,523 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:50,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:43:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:50,922 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:50,923 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [11] total 20 [2019-11-07 00:43:50,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945945525] [2019-11-07 00:43:50,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:43:50,924 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:50,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:43:50,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-11-07 00:43:50,925 INFO L87 Difference]: Start difference. First operand 17854 states and 28984 transitions. Second operand 11 states. [2019-11-07 00:43:55,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:55,688 INFO L93 Difference]: Finished difference Result 44630 states and 73186 transitions. [2019-11-07 00:43:55,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-07 00:43:55,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-11-07 00:43:55,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted.